🌐 中文版 README

A Comprehensive Network Diagnostics & Utility Toolkit for Android

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⚠️ IMPORTANT: If you use this repository, you MUST keep all author attribution intact. DO NOT REMOVE the author credits. See License & Attribution for details.

Copyright © 2024-2026 Khoo Lay Yang - All Rights Reserved

• About
• Feature Highlights
• Key Features
  • Network Tools
  • Utility Tools
  • Device Tools
  • MY OpenData
  • SG OpenData
  • IE OpenData
• Technical Stack
• Design System
• UI/UX Features
• Multi-language Support
• What's New
• Getting Started
• Features Breakdown
• Use Cases
• Privacy & Security
• Responsible Use
• Contributing
• License & Attribution
• Author
• Support
• Acknowledgments
• Statistics

CV Toolkit is a professional-grade, all-in-one Android application designed for network diagnostics, cloud infrastructure monitoring, system information, and a comprehensive suite of developer utilities. Built with modern Android technologies (Kotlin 2.3.20 + Jetpack Compose), it delivers 133 powerful tools across 139 screens in one beautifully designed app.

Perfect for:

• 👨‍💻 Network Administrators - Comprehensive network diagnostics and monitoring
• 🌐 Cloud Engineers - Test connectivity to 311+ regions across 14 cloud providers with real-time graphs
• 🔐 Security Professionals - Port scanning, SSL checking, and security analysis tools
• 💻 Software Developers - Encoding, hashing, JWT decoding, and development utilities
• 🎓 Students & Educators - Learn networking concepts with hands-on tools
• 🏠 Home Users - Troubleshoot network issues and monitor your connection

Why CV Toolkit?

• ✅ All processing is done 100% locally on your device
• ✅ Your data never leaves your phone - complete privacy guaranteed
• ✅ No registration or account required
• ✅ Works offline for most tools (network tools require connectivity)
• ✅ Professional-grade accuracy and performance
• ✅ Beautiful, modern Material Design 3 interface
• ✅ Regular updates with new features and improvements

The crown jewel of CV Toolkit - a professional-grade network monitoring tool featuring:

• Real-time line graphs with multi-region visualization
• Continuous monitoring with configurable intervals (1s/2s/5s)
• Comprehensive statistics: Min, Max, Avg, Jitter, and Packet Loss tracking
• 311+ test regions across 14 global cloud providers
• Monitor 35+ regions simultaneously with color-coded tracking
• Edge location detection for Cloudflare, CloudFront, and Alibaba Cloud
• Background service support for uninterrupted monitoring

Everything you need for network diagnostics, development, PDF management, image processing, code editing, Malaysia & Singapore open data, and system analysis in one app.

• Zero data collection
• No server uploads
• 100% local processing
• Transparent and well-documented

• Speed Test - Comprehensive internet speed testing with download/upload speeds, ping latency, jitter measurement, and historical tracking. Foreground service support for uninterrupted testing. Custom targets are now persisted across sessions — add your own with the + button and delete them anytime from the dropdown
• Ping Test - ICMP ping testing with packet count configuration, timeout settings, and detailed statistics (min/max/avg/packet loss)
• Continuous Ping - Multi-host real-time ping monitoring with live line graphs, color-coded per host, for ongoing connectivity analysis
• Traceroute - Visual network path tracing showing all hops with latency measurements and geographic information
• Port Scanner - Scan for open ports on any host with service detection and parallel scanning
• Network Scanner (Device Discovery) - Discover all devices connected to your network with MAC address lookup and manufacturer identification
• IP Lookup - Get detailed geolocation, ISP, security flags (VPN/proxy/TOR detection), and carrier information for any IP address with local history
• DNS Lookup - Comprehensive DNS record querying (A, AAAA, CNAME, MX, TXT, NS, SOA, PTR) with custom DNS server support and response time tracking
• Subnet Calculator - Advanced IPv4/IPv6 subnet calculations with CIDR notation, network/broadcast addresses, usable host range, and subnet mask conversion
• SSL/TLS Checker - Detailed SSL certificate inspection including validity period, issuer information, subject details, certificate chain, encryption algorithms, and expiration warnings
• Whois Lookup - Get domain registration information
• HTTP Headers Viewer - Inspect HTTP response headers
• Custom Request Builder - Build and send custom HTTP/CURL requests with headers and body
• WiFi Analyzer - Analyze WiFi signal strength, channels, and network details
• DNS Benchmark - Compare response times across 10 popular DNS providers (Google, Cloudflare, Quad9, OpenDNS, AdGuard, etc.) with bar chart visualization, sorting by speed/name/reliability, configurable query count, and detailed min/max/avg statistics
• CDN & Cloud Latency Test - Real-time monitoring with live graphs - Test latency to 311+ regions across 14 major providers with continuous ping, multi-region tracking, detailed statistics (min/max/avg/jitter/packet loss), automatic edge detection, and color-coded line charts:
  • AWS (Amazon Web Services)
  • GCP (Google Cloud Platform)
  • Azure (Microsoft Azure)
  • Oracle Cloud
  • Alibaba Cloud
  • DigitalOcean
  • Linode (Akamai)
  • Vultr
  • Hetzner
  • OVH
  • Tencent Cloud
  • Huawei Cloud
  • Lightsail
  • Fastly
• Network Stress Test - Quick-access hub for network performance diagnostics including speed tests, DNS lookups, and port scanning

🔄 Encoders & Decoders (8 tools):

• JSON Formatter/Validator - Format, minify, and validate JSON with syntax highlighting, statistics (key/value counts, depth, types), configurable indentation, and one-tap copy
• Base64 Encoder/Decoder - Encode and decode Base64 strings
• URL Encoder/Decoder - Encode and decode URL strings
• Binary Converter - Convert text to/from Binary, Hex, and Octal
• Hex Encoder/Decoder - Convert text to/from hexadecimal
• ASCII Converter - Convert text to ASCII values and vice versa
• JWT Decoder - Decode and inspect JWT tokens
• Image Base64 - Convert images to/from Base64 encoding

🔐 Security & Crypto (6 tools):

• Hash Generator - Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes
• Caesar Cipher - Encrypt/decrypt with Caesar cipher, ROT13, ROT47
• Morse Code Converter - Convert text to Morse code and back
• Password Generator - Generate strong, secure passwords with customizable options
• Password Strength Checker - Analyze password entropy, character composition, crack time estimation, detect common patterns/sequences, and provide detailed security checks with visual strength meter
• File Hash Calculator - Calculate MD5, SHA, CRC32 hashes for files with metadata

📱 QR & Barcode (3 tools):

• QR Code Generator - Generate QR codes from text, URLs, contacts, etc.
• Barcode Generator - Generate various barcode formats (EAN, UPC, Code 128, etc.)
• QR/Barcode Scanner - Scan and decode QR codes and barcodes with camera

🌐 Web & API (4 tools):

• API Tester - Save, organize, and execute API requests with custom headers and body
• User Agent Parser - Parse and analyze browser User-Agent strings
• Robots.txt Analyzer - Fetch and parse robots.txt files from any domain
• Sitemap Viewer - Parse and browse XML sitemaps

📄 PDF & Documents (8 tools):

• PDF Viewer - View and navigate PDF documents
• PDF Merge - Combine multiple PDF files into one with multi-select import, drag-to-reorder, and full page preview before saving
• PDF Split - Split PDF into individual pages or custom page ranges with visual page thumbnails, three split modes (Each Page, Page Range, Select Pages), and page selection/deselection
• PDF to Image - Extract PDF pages as high-quality PNG or JPEG images with configurable DPI (72/150/200/300), JPEG quality slider, per-page preview with dimensions and file size, and individual page saving
• Image to PDF - Convert images to PDF with multi-select import, drag-to-reorder, per-image rotation (90°/180°/270°), visual crop editor with draggable handles, page size/orientation/margin/fit settings, and full page preview before export
• Compress PDF - Reduce PDF file size
• PDF Password - Add or remove password protection from PDFs with 128-bit encryption, configurable permissions (printing, copying, modifying), auto-detection of encrypted files, and password verification
• Slides to PDF - Convert presentation slides (PPT) to PDF

✏️ Editors (4 tools):

• Text Editor - Create and edit text files on device
• Markdown Editor - Write markdown with live preview
• Markdown Preview - Render and preview markdown content
• SVG Viewer & Editor - View and edit SVG vector graphics

🎨 Media & Colors (18 tools):

• Compress Image - Reduce image file size while maintaining quality
• Image Resizer - Resize images to exact dimensions with social media presets (Instagram, Facebook, Twitter/X, YouTube, LinkedIn, TikTok, Pinterest, WhatsApp) and common sizes (HD, Full HD, 2K, 4K, A4), with aspect ratio locking
• Image Cropper - Crop images with 10 aspect ratio presets (Free, 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 5:4, 4:5), visual crop overlay with rule-of-thirds grid, draggable crop area, and corner handles
• Image Format Converter - Convert between JPEG, PNG, WebP (Lossy/Lossless), and BMP with quality control for lossy formats and before/after size comparison
• EXIF Viewer - View detailed image EXIF metadata organized by category: Camera (make, model, lens), Image Details (dimensions, resolution, color space, orientation), Shooting Settings (exposure, aperture, ISO, focal length, flash, metering), Date & Time, GPS Location (lat/long, altitude), and Copyright info. Copy all data to clipboard
• EXIF Remover - Strip EXIF metadata from images for privacy with batch processing support, EXIF tag count display, and clean JPEG output at 95% quality
• Color Picker - Pick colors from any image by tapping, with HEX, RGB, RGBA, and HSL values, per-value copy buttons, color history palette, and copy-all functionality
• Color Converter - Convert between HEX, RGB, HSL, and CMYK color formats
• Color Palette Generator - Generate and explore color palettes
• Favicon Generator - Generate favicons from images in 15 standard sizes (16x16 to 512x512) for browser tabs, Apple Touch Icons, Android Chrome, PWA, Windows tiles, and more, with select all/none, individual previews, and per-size saving
• GIF Maker - Create animated GIFs from multiple images or convert video to GIF with configurable frame delay (FPS), output width, and frame preview
• Photo Collage - Arrange multiple photos (2-6) into 7 layout templates (side-by-side, stacked, grid, L-shaped) with adjustable padding, background color, and output size
• Image Watermark - Add text or image watermarks with customizable opacity, position (9-point grid), rotation, color, size, and tiled pattern mode
• Image Background Remover - Remove image backgrounds by color selection with adjustable threshold and edge sensitivity, side-by-side before/after preview
• Image Filters - Apply visual filters and effects to images
• Image Rotate/Flip - Rotate and flip images with quick 90°/180°/270° rotation and horizontal/vertical flip options
• Meme Generator - Create memes by adding customizable text overlays to images
• Screenshot Stitcher - Combine multiple screenshots into a single long vertical image for sharing

🔢 Converters & Calculators (10 tools):

• IP Calculator - Convert between different IP formats
• Unit Converter - Convert length, weight, temperature, and data sizes
• World Time - View current time across global time zones
• Unix Timestamp Converter - Convert between Unix timestamps and readable dates
• UUID Generator - Generate UUID v1, v4, and v5
• Number Base Converter - Convert numbers between decimal, binary, hexadecimal, octal, and custom bases with real-time conversion
• Currency Converter - Live currency exchange rates for 30+ currencies with conversion calculations and caching
• Aspect Ratio Calculator - Calculate aspect ratios, scale dimensions while maintaining ratios, and preview common presets (16:9, 4:3, etc.)
• Date Calculator - Calculate days between dates, add/subtract time periods, and determine age with detailed year/month/day breakdowns
• Scientific Calculator - Full-featured calculator with trigonometric, logarithmic, and advanced math functions, history tracking, and angle mode selection

📝 Text & Misc (9 tools):

• Text Counter - Count words, characters, lines, and paragraphs
• Text Diff - Compare two texts and highlight differences
• Lorem Ipsum Generator - Generate placeholder text for design and development
• Typing Test - Practice and measure typing speed (WPM) and accuracy with 2,300+ unique content pieces across 25+ topics. Features 3 modes (Words/Sentences/Paragraphs), 3 difficulty levels, configurable duration (30s/60s/120s/Full Text), real-time stats, and repeat/new test options. Every session generates a unique random combination
• Stopwatch - Timer with lap functionality
• Text Case Converter - Convert text between uppercase, lowercase, title case, sentence case, and other formats
• Pomodoro Timer - Time-boxed productivity timer with work/break intervals for focused sessions
• Note Pad - Simple and quick note-taking utility
• Random Generator - Multi-tab random generator for numbers, strings, colors, UUIDs, and dice rolls with customizable parameters

• Device Information - Complete system information (CPU, RAM, storage, OS, etc.)
• DRM & Codec Info - View DRM systems, video/audio codecs, and supported formats
• Camera Information - Detailed camera specifications and capabilities
• Security Audit - Comprehensive device security check and vulnerability assessment
• Sensor Dashboard - Real-time readings from all device sensors (accelerometer, gyroscope, proximity, etc.)
• NFC Reader - Read and display NFC tag contents including tag type (MIFARE, ISO 14443, FeliCa, etc.), tag ID, NDEF records with parsed URI/text/MIME payloads, supported technologies, writable status, and max size. Copy all data to clipboard
• Battery Info - Real-time battery status including level, health, temperature, voltage, and charging information with auto-refresh
• Display Info - Detailed display specifications including resolution, density, refresh rate, supported refresh rates, and HDR capabilities
• Storage Analyzer - Visual breakdown of internal storage usage by category (apps, media, cache, etc.) with ring charts and RAM analysis
• Bluetooth Scanner - Discover and list nearby Bluetooth devices with signal strength (RSSI), device type, bond status, and BLE/Classic support
• GPS Location - Track current GPS location with coordinates, address, altitude, speed, and connected satellite constellation information

Real-time government statistics and data from Malaysia's official open data portal (DOSM & data.gov.my):

• Weather - Weather forecasts, severe weather warnings, and earthquake information for Malaysia using official government API
• Birthday Explorer - Explore the number of births on any selected date in Malaysia with historical data spanning 1920–2022
• Data Catalogue - Browse Malaysia's comprehensive open data catalogue organized by categories (demography, households, economy, etc.)
• Immigration - Track international arrivals to Malaysia by country with monthly trends and demographic breakdowns
• Fuel Price - Historical fuel prices (RON95, RON97, diesel) in Malaysia with weekly change data and price trend charts
• Population - Population statistics by Malaysian states with bar charts, sorting by name or population, and year selection
• Exchange Rate - BNM historical exchange rates for MYR against 15+ currencies with trend visualization
• CPI & Inflation - Consumer Price Index trends and year-over-year inflation rates for Malaysia
• COVID-19 - COVID-19 case statistics by Malaysian state with new cases, active cases, recoveries, and imported case tracking
• Crime Statistics - Crime data by category (assault, robbery, theft, etc.) with yearly trends and summary statistics
• Transport Ridership - Public transportation ridership data for KL/Selangor including LRT, MRT, Monorail, KTM, and ETS services
• Births & Deaths - Annual births vs deaths demographic trends with line charts and natural growth statistics
• Marriage Statistics - Annual marriage trends with counts, rates per 1,000, peak year analysis, and trend visualization
• Household Income - Household income comparison by state with mean/median income, expenditure, bar charts, and year selector
• GDP & GNI - Real GDP and GNI growth trends with per-capita analysis, year-over-year growth percentages, and multi-line charts
• Labour Market - Monthly employment and unemployment statistics with color-coded unemployment rate trends and labour force breakdown
• Blood Donations - Daily blood donation tracking with 7-day/30-day averages, monthly aggregation bar charts, and color-coded donation levels
• Interest Rates - BNM interest rate trends including OPR, base rate, fixed deposit, and savings rates with multi-line comparison charts
• Electricity Consumption - Monthly electricity consumption by sector (residential, commercial, industrial) with trend charts and sector breakdown
• EPF Dividend - Historical EPF dividend rates for conventional and shariah accounts with trend visualization and rate comparison
• Vehicle Registrations - Monthly car registration trends with 12-month averages, peak month analysis, and bar charts
• Transit Tracker - Real-time public transport vehicle tracking on an interactive OpenStreetMap with GTFS Realtime data from 15 Malaysian transit agencies (KTMB, Prasarana, myBAS), live vehicle positions with route/speed/bearing, user geolocation with nearest-first sorting, vehicle route tracing with polyline trails, and auto-refresh every 30 seconds
• Sarawak Data - Browse and search 200+ Sarawak state government datasets with dedicated viewer pages featuring auto-charts, stats, search, filter, and multi-format parsing (XLSX, CSV, HTML, JSON)

Real-time government data and 5,000+ datasets from Singapore's data.gov.sg:

Real-time Weather & Environment:

• SG Weather - 24-hour forecast, 2-hour area forecast, and 4-day outlook with regional breakdowns by area (North/South/East/West/Central)
• SG Air Quality - PSI, PM2.5, and UV Index readings by region with color-coded health indicators and hourly bar charts
• SG Environment - Real-time air temperature, rainfall, humidity, wind speed, and wind direction readings from 50+ weather stations with bar charts
• SG Heat Stress (WBGT) - Wet Bulb Globe Temperature readings from 15 monitoring stations with heat stress level indicators (Low/Moderate/High/Extreme)
• SG Lightning - Real-time lightning strike observations on an interactive OpenStreetMap with Cloud-to-Cloud and Cloud-to-Ground classification
• SG Flood Alerts - Active flood warnings with severity levels, affected areas, and recommended actions from PUB

Transport:

• SG Taxi Availability - Real-time map of 3,000+ available taxis across Singapore on OpenStreetMap with regional distribution summary
• SG Carpark - Real-time HDB carpark lot availability with search, sort by availability/occupancy, and color-coded occupancy bars
• SG Traffic Cameras - Live traffic camera images in a 2-column grid with tap-to-expand full-screen view from 80+ cameras

Intellectual Property:

• SG IP Applications - Design and patent application lookup by lodgement date with status tracking and detailed application info

Reference:

• SG Data Catalogue - Browse and search 5,000+ government datasets, each opening as its own dedicated page with auto-generated charts, summary statistics, search, filter dropdowns, column sorting, and multi-format parsing (XLSX, CSV, HTML, JSON)

Ireland's open data portal with 21,900+ government datasets:

• IE Data Catalogue - Browse and search 21,900+ Irish government datasets from data.gov.ie with theme filters (Government, Environment, Health, Society, Transport), each opening as a dedicated page with auto-generated charts, summary statistics, search, filter, sort, and multi-format parsing (XLSX, CSV, HTML tables, JSON) with WebView fallback for web-based datasets

• Language: Kotlin 2.3.20 (100%)
• UI Framework: Jetpack Compose BOM 2026.03.00 (Modern declarative UI with Material Design 3)
• Architecture: MVVM with Repository pattern for clean separation of concerns
• Build System: AGP 9.1.0, Gradle 8.0+, JDK 11+
• Networking:
  • Retrofit 3.0.0 (Type-safe REST API calls)
  • OkHttp 5.3.2 (HTTP client with interceptor support and logging)
  • Gson 2.13.2 (JSON parsing and serialization)
  • Coroutines (Asynchronous programming)
• Camera & ML:
  • CameraX 1.5.3 (Modern camera API with preview and analysis)
  • ML Kit Barcode Scanning 17.3.0 (On-device QR/Barcode recognition)
  • ZXing Core 3.5.4 (QR code and barcode generation)
• Data Visualization:
  • Canvas API (Custom line graphs and charts)
  • Real-time rendering with Compose recomposition
• Background Processing:
  • Foreground Services (Speed tests and continuous monitoring)
  • Coroutines (Parallel processing and async operations)
• Data Persistence:
  • SQLite (IP lookup history storage)
  • SharedPreferences (Language settings, ad usage tracking)
• Navigation: Jetpack Navigation Compose 2.9.7 with type-safe sealed class routes (139 destinations)
• Minimum SDK: Android 7.0 (API 24) - Wide device compatibility
• Target SDK: Android 16 (API 36) - Latest Android features
• Compilation SDK: 36 (Android 16)
• Transit & Open Data:
  • GTFS Realtime Bindings (Protocol Buffers parsing for real-time transit feeds)
  • Protobuf Java 4.x (Binary protocol buffer deserialization)
  • WebView + Leaflet.js (Interactive OpenStreetMap display with markers and polylines)
  • Built-in FileParser (XLSX via ZIP+XML, CSV/TSV, HTML table extraction — zero external dependencies)
  • CKAN API integration (Ireland, Sarawak open data portals)
  • WebViewAssetLoader (local asset serving for map tiles)
• Image Loading: Coil 2.7.0 (Efficient image loading with SVG support and caching)
• Monetization: Google AdMob (Non-intrusive banner ads with usage-based interstitial and rewarded ads)

CV Toolkit ships a custom diagnostic-tool design language built on top of Material Design 3. The full system lives under app/src/main/java/cv/toolkit/ui/:

ui/
├── theme/
│   ├── Color.kt       ─ Brand palette + semantic latency / chart tokens
│   ├── Type.kt        ─ Full M3 type scale + MonoText (Display/Title/Body/Label)
│   ├── Shape.kt       ─ Tighter corner radii (6 / 10 / 14 / 18 / 24 dp)
│   └── Theme.kt       ─ Light + dark schemes, edge-to-edge system bars
├── components/
│   └── Components.kt  ─ Reusable primitives (see below)
└── UpdateDialog.kt

Dynamic color (Material You) is opt-in so the brand identity stays consistent across devices and screenshots.

Instead of inline hex literals, screens pull from semantic tokens declared in Color.kt:

A latencyColor(ms) helper in ui/components/Components.kt returns the right token for a latency reading.

MonoText styles (Display / Title / Body / Label) deliver tabular numerics for stats, latency, IPs, hashes, hex dumps, byte counters and version strings. UI chrome uses FontFamily.SansSerif.

Common primitives in ui/components/Components.kt:

• SectionHeader(label, count) — "▸ NETWORK TOOLS [16]" terminal-style header
• FlagSectionHeader(label, flagPainter, count) — country-grouped section header
• MonoCountChip(count) — small monospace count pill
• StatusBadge(text, tone) — dot + mono pill for stats and statuses
• StatTile(label, value, icon, tone) — outlined stat card with mono value
• ToolScaffold(title, onBack, actions, content) — consistent tool-screen wrapper
• MonoTag(text) — tiny caps mono label (e.g. RTT, TTL, AS#)

• Custom Diagnostic-Tool Design Language - Distinctive technical aesthetic built on Material Design 3: SignalCyan primary, TerminalGreen secondary, Amber tertiary with deep "ink" dark surfaces and warm "paper" light surfaces
• Monospaced Numerics - IP addresses, hashes, latency readings, byte counters and version strings render in monospace for clean column alignment
• Outlined Card Grid - Dense, scannable tool grid with tinted icon squares, mono section counts and "▸ SECTION" terminal-style headers
• Tab Pills with Mono Counts - Compact scrollable category switcher with per-tab tool counts
• Adaptive Light & Dark Themes - Cohesive light and dark palettes; system-bar icon contrast follows background luminance automatically
• Edge-to-Edge Layout - Transparent system bars across all screens
• Semantic Latency Tokens - Centralized latencyColor() helper (Excellent/Good/Fair/Poor) drives status badges across CDN, Ping, DNS, and SSL tools
• Reusable Design Components - Shared SectionHeader, StatusBadge, StatTile, ToolScaffold, MonoTag primitives keep all 139 screens visually consistent
• Responsive Layout - Optimized for all screen sizes and orientations
• Smooth Animations - Polished transitions and interactions
• Real-time Updates - Live data visualization without page refreshes
• Provider Logos - Visual identification with official brand logos
• Intuitive Navigation - Easy-to-use interface with logical organization
• Copy & Share - One-tap actions for results and data
• Search & Filter - Quickly find what you need across 311+ regions

CV Toolkit supports 18 languages:

A focused release: zero new tools, every screen redesigned. The app moves from the stock Material You purple template to a custom, distinctive brand identity inspired by terminal / network-diagnostic tools, plus a long-standing Speed Test bug is fixed.

New design language across all 139 screens:

Component library — new ui/components/ package with SectionHeader, FlagSectionHeader, MonoCountChip, StatusBadge, StatTile, ToolScaffold, MonoTag, plus a latencyColor() helper that returns semantic latency tokens (LatencyExcellent / Good / Fair / Poor / Unknown) — usable across every tool screen instead of inline hex literals.

Redesigned screens — Home (brand top bar with mono tagline · outlined card grid · pill tabs · terminal-style section headers · refined Privacy/About dialogs and empty-results state) · Settings (section headers · outlined row cards with tinted icon containers · mono English-name subtitle for languages) · Update dialog (mono version + filesize, primary-tinted version label).

Bug fixes:

• Speed Test — custom targets now persist — Targets added via the + button are saved to SharedPreferences (via new SpeedTestTargetsManager, Gson-encoded) and survive both navigation away from the screen and full app restart. Built-in targets stay protected; custom targets gain a trash-icon delete button in the dropdown that falls back to the first default if the currently-selected target is removed.

Internal changes:

• New ui/theme/Shape.kt, ui/components/Components.kt, data/SpeedTestTargetsManager.kt
• Removed deprecated Window.statusBarColor / Window.navigationBarColor calls in favor of enableEdgeToEdge() + WindowInsetsControllerCompat.isAppearanceLightStatusBars

New Malaysia Open Data Tools (22 tools):

• Weather - Real-time weather forecasts, severe weather warnings, and earthquake information from Malaysia's official API
• Birthday Explorer - Discover the number of births on any date in Malaysia with data spanning 1920–2022
• Data Catalogue - Browse Malaysia's open data catalogue organized by demography, economy, households, and more
• Immigration - International arrivals to Malaysia by country with monthly trends and breakdowns
• Fuel Price - Historical RON95, RON97, and diesel prices with weekly change data and trend charts
• Population - State-level population statistics with bar charts, sorting, and year-by-year comparison
• Exchange Rate - BNM exchange rates for MYR against 15+ currencies with trend visualization
• CPI & Inflation - Consumer Price Index and inflation rate trends
• COVID-19 - Case statistics by state with new/active/recovered/imported case tracking
• Crime Statistics - Crime data by category with yearly trends and national summary
• Transport Ridership - Public transit ridership for LRT, MRT, Monorail, KTM, and ETS services
• Births & Deaths - Annual demographic trends with births vs deaths line charts and natural growth analysis
• Marriage Statistics - Marriage trends with annual counts, rates, and peak year analysis
• Household Income - State-level income comparison with mean/median income, expenditure, and interactive sorting
• GDP & GNI - Economic growth with real GDP/GNI trends, per-capita analysis, and YoY growth %
• Labour Market - Monthly employment stats with color-coded unemployment rate and labour force breakdown
• Blood Donations - Daily donation tracking with rolling averages and monthly aggregation charts
• Interest Rates - OPR, base rate, FD, and savings rate trends with multi-line comparison
• Electricity Consumption - Sector-level consumption (residential, commercial, industrial) with trend charts
• EPF Dividend - Historical conventional and shariah dividend rates with trend visualization
• Vehicle Registrations - Monthly car registration trends with averages and peak analysis
• Transit Tracker - Real-time public transport tracking on an interactive OpenStreetMap with GTFS Realtime protobuf parsing, 15 transit agencies, vehicle route tracing with polyline trails, user geolocation, and 30-second auto-refresh

New Device Tools (5 tools):

• Battery Info - Real-time battery level, health, temperature, voltage, and charging status with auto-refresh
• Display Info - Screen resolution, density, refresh rates, and HDR capability detection
• Storage Analyzer - Visual storage breakdown by category with ring charts and RAM analysis
• Bluetooth Scanner - Discover nearby Bluetooth devices with RSSI, device type, and BLE/Classic support
• GPS Location - Live GPS tracking with coordinates, address, altitude, speed, and satellite info

New Media & Image Tools (5 tools):

• Image Background Remover - Remove backgrounds by color selection with adjustable threshold and side-by-side preview
• Image Filters - Apply visual filters and effects to images
• Image Rotate/Flip - Quick rotation (90°/180°/270°) and horizontal/vertical flip
• Meme Generator - Create memes with customizable text overlays on images
• Screenshot Stitcher - Combine multiple screenshots into a single long vertical image

New Converters & Calculators (5 tools):

• Number Base Converter - Convert between decimal, binary, hex, octal, and custom bases
• Currency Converter - Live exchange rates for 30+ currencies with conversion
• Aspect Ratio Calculator - Calculate and scale dimensions with common presets
• Date Calculator - Days between dates, add/subtract periods, and age calculation
• Scientific Calculator - Trigonometric, logarithmic, and advanced math functions with history

New Productivity & Text Tools (4 tools):

• Random Generator - Generate random numbers, strings, colors, UUIDs, and dice rolls
• Text Case Converter - Convert between uppercase, lowercase, title case, and more
• Pomodoro Timer - Time-boxed work/break intervals for focused productivity
• Note Pad - Quick and simple note-taking utility

Network (1 tool):

• Network Stress Test - Quick-access hub for network performance diagnostics

New Singapore OpenData Tools (11 tools):

• SG Weather - 24-hour, 2-hour area, and 4-day weather forecasts from NEA
• SG Air Quality - PSI, PM2.5, UV Index by region with color-coded indicators
• SG Environment - Real-time temperature, rainfall, humidity, wind from 50+ stations with bar charts
• SG Heat Stress (WBGT) - Wet Bulb Globe Temperature from 15 stations with heat stress levels
• SG Lightning - Real-time lightning strikes on an interactive OpenStreetMap
• SG Flood Alerts - Active flood warnings from PUB with severity and area info
• SG Taxi Availability - Live taxi positions on OpenStreetMap with regional summary
• SG Carpark - Real-time HDB carpark availability with search, sort, and occupancy bars
• SG Traffic Cameras - Live traffic camera images in grid with tap-to-expand
• SG IP Applications - Design and patent lookup by date from IPOS
• SG Data Catalogue - Browse 5,000+ datasets, each as a dedicated page with auto-charts, stats, search, filter, and sort

New Ireland OpenData (1 tool):

• IE Data Catalogue - Browse 21,900+ Irish government datasets with theme filters, dedicated viewer pages with auto-charts, and multi-format file parsing (XLSX, CSV, HTML, JSON) with WebView fallback

New Sarawak OpenData (1 tool):

• Sarawak Data - Browse 200+ Sarawak state government datasets with dedicated viewer pages and multi-format file parsing

Universal Data File Parser:

• Built-in parser handles XLSX (Excel), CSV, TSV, HTML tables, and JSON — no external dependencies
• XLSX parsing via Android's built-in ZIP + XML libraries
• HTML table extraction with tag stripping and entity decoding
• WebView fallback for web-based datasets that don't contain tabular data
• All parsed data displayed with auto-generated charts, summary statistics, search, filter, and sort

New Media & Image Tools (3 tools):

• GIF Maker - Create animated GIFs from selected images or convert video clips to GIF. Features configurable frame delay/FPS, adjustable output width, frame preview thumbnails, and video frame extraction (up to 30 frames)
• Photo Collage - Arrange 2-6 photos into beautiful layouts with 7 templates (2 Side, 2 Stack, 3 Left, 3 Top, 4 Grid, 3 Row, 6 Grid). Customizable padding, output size (540-2160px), and 8 background color options with center-crop fitting
• Image Watermark - Add text or image watermarks with full customization: text size/color/opacity/rotation, image scale/opacity, 9-point position grid, and tiled pattern mode for repeating watermarks across the entire image

New Device Tool (1 tool):

• NFC Reader - Read and display NFC tag contents with automatic tag type detection (MIFARE Classic/Ultralight, ISO 14443, FeliCa, ISO 15693), NDEF record parsing (URI, text, MIME), tag ID, technology list, writable status, max size, and copy-to-clipboard support

New Image & Media Tools (7 tools):

• Image Resizer - Resize images to exact dimensions with 12 social media presets and 10 common size presets, aspect ratio locking
• Image Cropper - Crop images with 10 aspect ratio presets, visual overlay with rule-of-thirds grid and corner handles
• Image Format Converter - Convert between JPEG, PNG, WebP (Lossy/Lossless), and BMP with quality slider
• EXIF Viewer - View all EXIF metadata (camera, shooting settings, GPS, dates, copyright) organized by category
• EXIF Remover - Batch strip EXIF data from images for privacy protection
• Color Picker - Tap on any image to extract colors with HEX, RGB, RGBA, HSL values and color history
• Favicon Generator - Generate favicons in 15 standard sizes (16x16 to 512x512) for websites and apps

New PDF Tools (3 tools):

• PDF Split - Split PDFs by page range or select individual pages with visual thumbnails
• PDF to Image - Extract pages as PNG/JPEG at configurable DPI (72-300)
• PDF Password - Add 128-bit encryption or remove password protection with configurable permissions

PDF Merge Improvements:

• Multi-select PDF import - select multiple PDFs at once instead of adding one by one
• Drag-to-reorder - long press and drag to rearrange PDF order
• Full page preview - swipe through all pages before saving the merged PDF

Image to PDF Improvements:

• Image Rotation - rotate any image 90°/180°/270° before conversion with one tap
• Visual Crop Editor - crop images with draggable corner handles, dark overlay preview, and rule-of-thirds grid
• Drag-to-reorder - long press and drag to rearrange image order
• Full page preview - swipe through all pages with settings applied before exporting
• Preview shows all pages (not just the first) with page counter and swipe navigation

The CDN & Cloud Latency Test has been completely redesigned with professional-grade features:

🎯 Real-time Line Graphs

• Multi-color line charts showing latency trends over time
• Support for monitoring 35+ regions simultaneously
• Auto-scaling Y-axis with grid lines
• Time-series X-axis with mm:ss timestamps
• Smooth animations and responsive updates

📊 Continuous Monitoring

• Configurable ping intervals (1s, 2s, or 5s)
• Background service support for uninterrupted testing
• Add/remove regions on-the-fly without stopping monitoring
• Batch monitoring for all regions in a provider

📈 Advanced Statistics

• Per-region statistics cards with color-coded latency badges:
  • 🟢 Green: < 50ms (Excellent)
  • 🟡 Yellow: 50-100ms (Good)
  • 🟠 Orange: 100-200ms (Fair)
  • 🔴 Red: ≥ 200ms (Poor)
• Comprehensive metrics: Sent count, Packet loss %, Min/Max/Avg latency, Jitter
• Historical tracking: Last 30 data points per region
• Graph legend: Color-coded region identification

🌐 Edge Detection

• Automatically detects your CDN edge location
• Shows Cloudflare, CloudFront, and Alibaba Cloud connections
• Visual provider logos for easy identification

✨ UI Improvements

• Provider logos for all 14 cloud providers
• Sort by latency, name, or location
• Search and filter across 311+ regions
• Export results for documentation
• Responsive Material Design 3 interface

Screenshots are pending the V10 design refresh — drop the new captures into docs/screenshots/ and link them here:

<div align="center">
  <img src="docs/screenshots/home.png" width="240" />
  <img src="docs/screenshots/cdn-latency.png" width="240" />
  <img src="docs/screenshots/settings.png" width="240" />
</div>

• Android Studio: Meerkat (2024.3) or later recommended
• Android SDK: API 24 (Android 7.0) or higher
• AGP: 9.1.0+
• Kotlin: 2.3.20+
• Gradle: 8.0+
• JDK: Java 11 or higher

1. Clone the repository:

git clone https://github.com/osscv/CV-Toolkit.git
cd CVToolkit

1. Open the project in Android Studio

   • Select "Open an Existing Project"
   • Navigate to the cloned directory
   • Android Studio will automatically detect the project

2. Sync Gradle dependencies

   • Android Studio will prompt to sync
   • Or manually: File → Sync Project with Gradle Files

3. Configure AdMob (Optional)

   • The app includes AdMob integration
   • AdMob ID is in AndroidManifest.xml
   • Replace with your own ID if publishing your own version

4. Build and run

   • Connect your Android device or start an emulator
   • Click Run (▶) or press Shift+F10

Debug Build:

./gradlew assembleDebug

Release Build:

./gradlew assembleRelease

Install on Device:

./gradlew installDebug

Run Tests:

./gradlew test

APK Location:

• Debug: app/build/outputs/apk/debug/app-debug.apk
• Release: app/build/outputs/apk/release/app-release.apk

• Lookup your current IP or any custom IP address
• Get detailed information: location, ISP, ASN, timezone
• History tracking with timestamps stored locally
• Uses dkly DATAHUB API

Comprehensive Provider Coverage:

• 311+ Test Regions across 14 Major Providers:
  • Azure (46 regions)
  • AWS (30+ regions)
  • Google Cloud Platform (40+ regions)
  • Alibaba Cloud (23 regions)
  • Oracle Cloud (20 regions)
  • DigitalOcean (15 regions)
  • Vultr (32 regions)
  • Linode (12 regions)
  • Lightsail (11 regions)
  • Hetzner (6 regions)
  • OVH (17 regions)
  • Fastly (18 regions)
  • Tencent Cloud (15 regions)
  • Huawei Cloud (12 regions)

Edge Location Detection:

• Automatically detects your nearest CDN edge location
• Shows Cloudflare, CloudFront, and Alibaba Cloud edge servers
• Displays real-time connection information

Real-time Monitoring & Graphing:

• Live Line Graph - Visualize latency trends over time with multi-color line charts
• Continuous Ping Mode - Monitor multiple regions simultaneously
• Configurable Intervals - Choose between 1s, 2s, or 5s ping intervals
• Multi-region Tracking - Monitor up to 35+ regions at once with color-coded lines
• Auto-scaling Graph - Dynamic Y-axis scaling based on latency values
• Time-series Display - X-axis shows timestamps with mm:ss format

Detailed Statistics:

• Current Latency - Real-time latency with color indicators (Green < 50ms, Yellow < 100ms, Orange < 200ms, Red ≥ 200ms)
• Min/Max/Avg - Comprehensive latency statistics
• Jitter - Network stability measurement (variance between consecutive pings)
• Packet Loss - Percentage of failed ping attempts
• Sent Count - Total number of ping attempts
• Historical Data - Stores last 30 data points per region

Advanced Features:

• Provider Logos - Visual provider identification with official logos
• Sort Options - Sort by latency, name, or location
• Search & Filter - Quickly find specific regions
• Export Results - Share and save test results
• Add/Remove Monitoring - Dynamically add or remove regions from monitoring
• Background Service - Continue testing even when app is minimized
• Statistics Cards - Individual stat cards for each monitored region with color-coded badges

• Fast Network Scanning - Discover all devices on your local network
• MAC Address Lookup - Identify device manufacturers automatically
• Parallel Scanning - Multi-threaded scanning for faster results
• Device Details - IP address, MAC address, hostname, and manufacturer
• Export Functionality - Save device list for documentation
• Real-time Updates - See devices as they're discovered

• Comprehensive Port Scanning - Scan any port range (1-65535)
• Common Ports Preset - Quick scan of well-known service ports
• Service Detection - Automatic identification of services (HTTP, FTP, SSH, etc.)
• Parallel Scanning - Multi-threaded for faster results
• Timeout Configuration - Adjustable connection timeouts
• Export Results - Save scan reports for security audits

• ML Kit Powered - Google's machine learning for accurate scanning
• Multiple Format Support - QR Code, EAN-8, EAN-13, UPC-A, UPC-E, Code 39, Code 93, Code 128, ITF, Codabar, Aztec, Data Matrix, PDF417
• Real-time Camera Preview - Instant scanning with visual feedback
• Automatic Detection - No need to press buttons, auto-detects codes
• Smart Actions - Automatic URL opening, contact adding, Wi-Fi connecting
• Scan History - Keep track of all scanned codes with timestamps
• Copy to Clipboard - One-tap copy of scanned content
• Flashlight Support - Scan in low-light conditions

1. Network Troubleshooting

   • Use Ping Test to verify host connectivity
   • Run Traceroute to identify routing issues
   • Scan network with Device Discovery to find unauthorized devices
   • Check DNS resolution with DNS Lookup

2. Infrastructure Monitoring

   • Monitor cloud regions with CDN Latency Test's continuous mode
   • Track jitter and packet loss for quality assessment
   • Export results for reports and documentation

3. Security Audits

   • Scan ports to identify exposed services
   • Check SSL certificates for expiration and validity
   • Verify DNS records and configurations

1. Multi-region Latency Testing

   • Test all AWS/Azure/GCP regions simultaneously
   • Compare provider performance from your location
   • Identify optimal regions for deployment

2. Performance Monitoring

   • Set up continuous monitoring for critical regions
   • Track latency trends over time with graphs
   • Analyze jitter and stability metrics

1. API Development

   • Test HTTP headers and responses
   • Build custom HTTP requests with headers
   • Decode JWT tokens for debugging
   • Generate test data (UUIDs, passwords, QR codes)

2. Data Processing

   • Encode/decode Base64 strings
   • Calculate hash values (MD5, SHA)
   • Convert between formats (hex, binary, ASCII)
   • Parse and analyze user agent strings

• Visualize how network routing works (Traceroute)
• Understand DNS resolution process
• Learn about subnet calculations and IP addressing
• Explore different encoding formats
• See real-time network latency across the globe

Your Privacy Matters:

• ✅ All data processing is performed locally on your device
• ✅ No data is uploaded to our servers or any external servers
• ✅ Network scans, device information, and lookup results stay on your phone only
• ✅ IP lookup history is stored locally only
• ✅ No personal data collection, storage, or transmission
• ✅ Transparent and well-documented

Permissions Used:

• INTERNET - Required for network diagnostics, IP lookups, DNS queries
• ACCESS_NETWORK_STATE - Detect current network configuration
• CAMERA - QR/Barcode scanning and camera info (optional feature)
• FOREGROUND_SERVICE / FOREGROUND_SERVICE_DATA_SYNC - Background speed tests and continuous monitoring
• POST_NOTIFICATIONS - Speed test progress notifications
• ACCESS_WIFI_STATE / CHANGE_WIFI_STATE - WiFi analysis features
• ACCESS_FINE_LOCATION / ACCESS_COARSE_LOCATION - Location-based network features
• REQUEST_IGNORE_BATTERY_OPTIMIZATIONS - Sustained speed testing
• NFC - NFC tag reading (optional feature)

Advertising:

• This app displays ads via Google AdMob
• Google may collect data for personalized advertising
• Refer to Google's Privacy Policy for details

This app is designed for legitimate network diagnostics, troubleshooting, and educational purposes only.

Please Note:

• Only use network scanning tools on networks and devices you own or have explicit permission to test
• Unauthorized network scanning or port scanning may be illegal in your jurisdiction
• The app is provided "as is" without warranty
• The developer is not responsible for misuse or any legal issues arising from use of this app

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the project
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

By contributing to this project, you agree to:

• Maintain all existing author attributions and copyright notices
• Not remove or modify credits to the original author (Khoo Lay Yang)
• Keep the "About Author" section intact in the application
• Preserve all copyright and attribution information in documentation

All contributions will be reviewed to ensure compliance with these requirements.

Copyright © 2024-2026 Khoo Lay Yang. All Rights Reserved.

This project is proprietary software. Unauthorized copying, distribution, modification, or use of this software is prohibited without explicit permission from the author.

IMPORTANT: If you use, fork, or modify this repository, you MUST:

1. Keep all author attribution intact - Do not remove or modify:

   • The copyright notice "Copyright © 2024-2026 Khoo Lay Yang"
   • Author information (Name: Khoo Lay Yang, Website: www.dkly.net)
   • "Made with ❤️ by Khoo Lay Yang" footer in the README
   • Author credits in the app's "About Author" section

2. Maintain the original author credits in any:

   • Documentation files (README, LICENSE, etc.)
   • Source code headers or comments
   • Application UI/About screens
   • Derivative works or forks

3. Give appropriate credit when:

   • Sharing or distributing the app
   • Creating derivative works
   • Using code snippets or substantial portions
   • Publishing modified versions

Removal or modification of author attribution is strictly prohibited and constitutes a violation of the copyright.

For commercial use, licensing inquiries, or permission requests, please contact: www.dkly.net

Khoo Lay Yang

• Website: www.dkly.net

Feel free to open an issue on GitHub for:

• 🐛 Bug reports
• 💡 Feature requests or suggestions
• ❓ Questions about functionality
• 🔧 Technical issues

• Jetpack Compose - Modern Android UI toolkit
• Retrofit - Type-safe HTTP client
• ZXing - QR code generation
• ML Kit - Barcode scanning
• CameraX - Camera API
• Coil - Image loading with SVG support
• OkHttp - HTTP client
• AndroidX ExifInterface - EXIF metadata reading
• PDFBox Android - PDF encryption and password protection
• dkly DATAHUB - IP lookup services
• All cloud providers for their global infrastructure

• 133 Professional Tools organized into 5 tabs (All / Network / Utility / Device / OpenData with 4 countries) across 139 screens
• 311+ Global Test Regions across 14 cloud/CDN providers
• Real-time Monitoring with live graphs and continuous ping
• Advanced Analytics — Min / Max / Avg / Jitter / Packet Loss tracking
• 100% Local Processing — Your data stays on your device
• Custom Diagnostic-Tool UI built on Material Design 3 + Jetpack Compose (V10 refresh)
• Zero Server Dependencies for core functionality
• Multi-region Support — Monitor 35+ regions simultaneously
• Professional Grade — Network diagnostics used by IT professionals
• Privacy First — No data collection, no tracking
• 18 Languages — Global localization support