Tool Apps
August 14, 2026 · View on GitHub
A curated list of open-source utilities, file managers, system tools, and other helpful apps for Android. The list is sorted alphabetically.
| App Name | Description | Language | License | ⭐ Stars | Download |
|---|---|---|---|---|---|
| 2FAS Authenticator | A simple, safe, and open-source 2FA authenticator app. | Kotlin | GPL-3.0 | 1.5k |  |
| AcDisplay | A custom lock screen that provides a new way of handling notifications. | Java | GPL-2.0 | 750 | |
| Aegis Authenticator | A free, secure, and open-source app to manage your 2-step verification tokens. | Java | GPL-3.0 | 12.9k | |
| AFWall+ | An IPTables-based firewall for Android that requires root access. | Java | GPL-3.0 | 3.4k | |
| AIMSICD | An app to detect and warn against IMSI-Catchers (StingRays). | Java | GPL-3.0 | 5.4k |  |
| Amaze File Manager | A beautiful and feature-rich Material Design file manager for Android. | Kotlin | GPL-3.0 | 6.3k | |
| AnExplorer | Another powerful and customizable file manager for Android. | Java | Apache-2.0 | 2.0k | |
| Andlytics | An app for viewing statistics from the Google Play Developer Console. | Java | Apache-2.0 | 536 | — |
| AnotherMonitor | A developer tool that monitors and records CPU and memory usage. | Java | GPL-3.0 | 1.1k | — |
| AppOpsX | A front-end application for the Android AppOpsService to manage app permissions. | Java | MIT | 623 | — |
| Aurora Store | An open-source, alternative client to Google's Play Store with an elegant design. | Java | GPL-3.0 | 8.7k |  |
| Barcode Scanner (ZXing) | The official app for the popular open-source barcode scanning library. | Java | Apache-2.0 | 34.1k | — |
| Battarang Notifier | Get notified with a sound when your battery is low or fully charged. | Kotlin | MIT | 198 | |
| Beta Updater for WhatsApp | An app to update WhatsApp to the latest beta version. (Archived) | Java | GPL-3.0 | 207 | |
| BetterBatteryStats | Provides advanced battery statistics to help diagnose battery drain. | Java | Apache-2.0 | 670 | — |
| BinaryEye | A well-polished, ad-free barcode and QR code scanner for Android. | Kotlin | MIT | 2.3k | |
| Bitocle for GitHub | A simple app for viewing source code on GitHub. (Archived) | Java | Apache-2.0 | 203 | — |
| Bluetooth Simple | An experimental app demonstrating simple chat-style Bluetooth communication. | Kotlin | Apache-2.0 | 1.5k | — |
| BookStack | A self-hosted platform for storing and organizing information and documentation. | PHP | MIT | 19.0k | — |
| Brevent | An app to prevent other apps from running for long periods, without root. | Java | WTFPL | 845 | |
| Camera Color Picker | Uses the device's camera to capture colors around you in real time. | Java | Apache-2.0 | 224 | — |
| Clean Status Bar | A utility to tidy up your status bar before taking screenshots. | Java | MIT | 878 | — |
| Clip-Stack | A clipboard history manager with a Material Design interface. | Java | MIT | 918 | |
| Cloudflare Mobile | Manages Cloudflare from the phone: zones, DNS, cache, WAF, Workers, Zero Trust, and an explorer covering the whole API. | Dart | Apache-2.0 | 8 |  |
| Codecks | Local-first Android command deck, Bluetooth trackpad, and reviewable Mac automation surface. | Kotlin | Apache-2.0 | 1 | |
| ConnectBot | The original, powerful SSH client for the Android platform. | Kotlin | Apache-2.0 | 3.4k | |
| Content Provider Helper | A developer tool to discover, query, and understand content providers. | Java | GPL-3.0 | 71 | — |
| Cryptomator | Provides transparent, client-side encryption for your cloud files. | Kotlin | GPL-3.0 | 1.2k | |
| DashClock Widget | A popular, extensible lock screen and home screen widget. | Java | Apache-2.0 | 486 | — |
| DAVx⁵ | A CalDAV/CardDAV/WebDAV sync app for contacts, calendars, and files. | Kotlin | GPL-3.0 | 2.8k | |
| DesignOverlay | A developer tool that displays a design image overlay to help with UI implementation. | Java | Apache-2.0 | 202 | — |
| Developer Toolbelt | An on-device tool for low-memory testing by filling RAM. | Java | Apache-2.0 | 338 | — |
| Device Control | An app for rooted devices to control various system features. | Java | GPL-3.0 | 183 | — |
| Droid Watcher | A remote control application with rich functionality. (Archived) | Java | Apache-2.0 | 152 | — |
| DuckDuckGo | The official, privacy-focused web browser from DuckDuckGo. | Java | Apache-2.0 | 2.5k | |
| FBReaderJ | A free and ad-free multi-platform ebook reader supporting many formats. | Java | GPL-2.0 | 1.9k | |
| Filester | Temporary cloud storage for fast, private file sharing | Kotlin | GPL-3.0 | 185 | |
| Firefox | The official repository for the Firefox browser on Android. | Kotlin | MPL-2.0 | 6.4k | |
| Firefox Focus | A lightweight, private browser with automatic ad and tracker blocking. | Kotlin | MPL-2.0 | 2.1k | |
| Flock | A private contact and calendar sync solution. (Archived) | Java | GPL-3.0 | 357 | — |
| Florisboard | A modern, privacy-respecting, and customizable keyboard for Android. | Kotlin | Apache-2.0 | 8.6k | |
| FluxDown | A multi-protocol download manager with IDM-style dynamic segmentation for HTTP, FTP, BitTorrent, eD2K, HLS and DASH. | Rust | AGPL-3.0 | 2.0k | |
| Forecastie | A simple weather app that uses data from OpenWeatherMap. | Java | Apache-2.0 | 902 | — |
| GfyCat | An app for browsing and sharing animated content from gfycat.com. (Archived) | Java | Apache-2.0 | 360 | |
| GitFox | A client to manage GitLab projects, built with Clean Architecture. | Kotlin | Apache-2.0 | 514 | |
| GitHub Status | A simple app to view the current status of GitHub's services. | Java | Apache-2.0 | 18 | — |
| GitHub Store | Github Store is a cross‑platform “play store” for GitHub releases. It discovers repositories that ship real installable binaries and lets you install, track, and update them across platforms from one place. | Kotlin | Apache-2.0 | 17.6k | |
| Good Weather | A clean, open-source weather app for Android. | Java | GPL-3.0 | 250 | — |
| Granular Volume: Quiet Dial | Lowers system audio below the hardware volume floor, in seven steps down to -30 dB, from a floating dial. | Kotlin | GPL-3.0 | 25 | |
| GridWichterle | A developer tool that shows a grid overlay on the screen to help verify UI designs. | Java | Apache-2.0 | 403 | — |
| Hash Checker | A fast and simple app for generating and comparing file or text hashes. | Java | MIT | 216 | — |
| Instant Weather | A weather app using MVVM, Retrofit2, Dagger Hilt, Room, and Navigation Components to fetch real-time conditions from OpenWeatherMap. | Kotlin | MIT | 762 | Google Play |
| Intent Intercept | A developer tool to intercept and examine the contents of Android Intents. | Java | Apache-2.0 | 395 | — |
| IYPS | A password strength testing app with crack time estimates and suggestions. | Kotlin | GPL-3.0 | 272 | |
| JianShi | A beautiful note-taking app with a traditional Chinese style. (Archived) | Java | Apache-2.0 | 1.8k | |
| KDE Connect | A multi-platform app that allows your devices to communicate with each other. | Kotlin | GPL-2.0 | 1.4k | |
| KeePassDX | A lightweight and secure password manager compatible with the KeePass format. | Kotlin | GPL-3.0 | 7.1k | |
| LeafPic | An ad-free, open-source, and Material Design gallery alternative. (Archived) | Java | GPL-3.0 | 3.3k | — |
| LibreTorrent | An ad-free, open-source, Material Design torrent client. | Java | GPL-3.0 | 3.8k | |
| LittleFreshWeather | A clean and simple weather forecast app for Chinese cities. (Archived) | Java | Apache-2.0 | 49 | |
| lmgtfyGen | An app that generates "Let Me Google That For You" URLs. | Kotlin | Apache-2.0 | 5 | — |
| LockIt | A simple app lock application with a clean and elegant UI. (Archived) | Java | Apache-2.0 | 282 | |
| Material Color Picker | A simple, minimalistic, and beautiful color picker for developers. | Java | Apache-2.0 | 86 | — |
| Material Design Colors | A developer tool to visualize the official Material Design color palette. | Java | Apache-2.0 | 252 | — |
| Materialize | An app that applies a Material Design theme to other apps. (Archived) | Java | GPL-3.0 | 405 | — |
| MDX | An app for developers and designers to explore Material Design palettes and icons. | Java | MIT | 41 | — |
| MGit | A full-featured Git client for Android. | Java | GPL-3.0 | 1.6k | |
| MLManager | A modern, easy, and customizable app manager for Android. | Java | GPL-3.0 | 1.2k | |
| Moticons | An app to manage and use Japanese Emoticons (Kaomoji) with Material Design. | Java | GPL-3.0 | 76 | — |
| MultiROM Manager | The official companion app for the MultiROM multi-boot mod. | Java | GPL-3.0 | 150 | — |
| NetGuard | A no-root firewall for Android to block internet access on a per-app basis. | Java | GPL-3.0 | 3.8k | |
| Nevolution | Evolve the Android notification experience with community-driven plug-ins. | Java | Apache-2.0 | 677 | — |
| Nextcloud | The official client for the self-hosted Nextcloud productivity platform. | Kotlin | GPL-2.0 | 5.5k | — |
| Ninja | A web browser that opens links in the background without leaving your current app. | Java | Apache-2.0 | 963 | — |
| Notally | A beautiful, minimalist, and offline-first notes app. | Kotlin | GPL-3.0 | 2.2k | |
| Notification Analyser | An application to analyze your device's notification history. | Java | MIT | 65 | — |
| Obtainium | Get app updates directly from their source (e.g., GitHub, F-Droid). | Dart | GPL-3.0 | 18.9k | — |
| Off Grid | A privacy-first, on-device AI suite for text generation, image generation, vision, and voice transcription — all offline. | TypeScript | MIT | 2.9k | — |
| Omni Notes | A feature-rich, open-source note-taking application for Android. | Java | GPL-3.0 | 2.8k | — |
| OpenHub for GitHub | An open source GitHub Android client app, faster and concise. | Java | GPL-3.0 | 4.4k | — |
| OS Monitor | A tool for monitoring your Android system's processes, network, and logs. | Java | GPL-2.0 | 328 | — |
| ownCloud | The official Android client for the self-hosted ownCloud file sync platform. | Kotlin | GPL-2.0 | 4.2k | |
| Permission Nanny | An experimental app to access resources without declaring permissions. | Java | Apache-2.0 | 22 | — |
| photo-affix | A utility to stitch photos together vertically or horizontally. | Kotlin | Apache-2.0 | 1.0k | |
| PocketPal AI | An on-device AI assistant powered by small language models (SLMs). | TypeScript | MIT | 7.9k | |
| PocketSage | A fully offline, on-device RAG assistant built with LiteRT-LM, Jetpack Compose, and Room. | Kotlin | Apache-2.0 | 7 | |
| PokePortal | A map application for finding PokeStops and Gyms in Pokémon GO. (Archived) | Kotlin | Apache-2.0 | 8 | — |
| Preferences Manager | A developer tool to view and edit any app's SharedPreferences. (Root required) | Java | Apache-2.0 | 167 | |
| Prey Anti Theft | The official client for the Prey anti-theft and device tracking software. | Java | GPL-3.0 | 441 | |
| Random Image Generator | A developer tool to generate a large number of random images quickly. | Kotlin | MIT | 7 | |
| Red Moon | A feature-rich screen filter app to reduce blue light at night. | Kotlin | GPL-3.0 | 727 | — |
| Ringdroid | The classic, open-source ringtone maker from early Android days. (Archived) | Java | Apache-2.0 | 859 | — |
| RxWeather | A weather app built to demonstrate architecting Android with RxJava. | Java | Apache-2.0 | 562 | — |
| S Tools+ | A utility app to track CPU, sensors, and other device information. | Java | GPL-3.0 | 200 | — |
| Secret Codes | An app to explore and launch hidden "secret codes" on your device. | Java | Apache-2.0 | 334 | |
| Shadowsocks | A secure socks5 proxy client, widely used for bypassing network censorship. | Kotlin | GPL-3.0 | 36.8k | |
| SmsCodeHelper | Automatically detects and copies verification codes from SMS messages. | Java | Apache-2.0 | 1.9k | |
| Snapdrop for Android | An Android client for the open-source local file sharing solution, Snapdrop. | Java | GPL-3.0 | 1.1k | |
| SoundRecorder | A simple sound recording app with a Material Design interface. | Java | GPL-3.0 | 1.5k | — |
| Status | A no-root status bar replacement for Android. | Java | Apache-2.0 | 9 | — |
| StockTicker | A resizable stock ticker widget for your Android home screen. | Kotlin | GPL-3.0 | 568 | |
| SuperCleanMaster | An open-source clone of the popular Clean Master utility app. | Java | Apache-2.0 | 1.9k | — |
| Talalarmo Alarm Clock | A simple and beautiful alarm clock for Android. | Java | MIT | 237 | — |
| Telecine | A simple app for recording full-resolution video of your device's screen. | Java | Apache-2.0 | 2.4k | — |
| Terminal Emulator | A classic VT-100 terminal emulator for the Android OS. | Java | Apache-2.0 | 3.2k | — |
| Termux | A powerful terminal emulator and Linux environment for Android. | Java | GPL-3.0 | 59.2k | |
| ToGoZip | Adds an "Add to Zip" option to Android's share menu. | Java | GPL-3.0 | 64 | — |
| ToolWizAppLock | A smart app lock utility for Android. | Java | Apache-2.0 | 501 | — |
| TrackerControl | An app to monitor and control hidden data collection (tracking) in other apps. | Java | GPL-3.0 | 2.6k | |
| translate-bubble-android | A floating translation bubble that works without interrupting your workflow. | Scala | Apache-2.0 | 280 | — |
| TranslateApp | Another take on an app that provides translations without interruptions. | Java | Apache-2.0 | 1.8k | — |
| Travis Client | An Android client for the Travis CI continuous integration service. | Java | Apache-2.0 | 45 | — |
| UPnP Browser | A simple browser for discovering UPnP devices on your local network. | Java | Apache-2.0 | 47 | — |
| UrlScheme Interceptor | A developer tool to intercept and debug URL schemes. | Java | Apache-2.0 | 38 | |
| v2rayNG | A V2Ray client for Android, supporting Xray and v2fly cores. | Kotlin | GPL-3.0 | 61.0k | — |
| Wassword | A simple app to generate complex and secure passwords. | Dart | MIT | 93 | |
| WhatsDeleted | Recovers deleted WhatsApp messages by scanning your device notifications. | Kotlin | Apache-2.0 | 51 | |
| WiFiKeyShare | A utility to share your Wi-Fi passwords with others via QR codes and NFC. | Java | GPL-3.0 | 122 | — |
| Work Tracker | A simple app to keep a log of the hours you have worked. | Kotlin | Apache-2.0 | 17 | — |
| Xsocks | A secure and fast proxy to protect your network traffic. | C | GPL-3.0 | 85 | |
| XWriter | An app for printing text as many times as needed and copying to the clipboard. | Java | GPL-3.0 | 3 | |
| ZigDash | A Material 3 MQTT dashboard built for Zigbee2MQTT smart homes, with automatic device discovery. | Dart | MIT | — | |
How to Contribute
Found an awesome open-source app that's missing? Feel free to open an issue or submit a pull request to add it!