Android
5104 apps · platform
OSS Card Wallet
APK
OSS Card Wallet is a free and Open Source app to transform your mobile device into a powerful card scanner and walletSCAN * Scan your IDs, business cards, loyalty cards with a fast camera scan. * Enjoy the automatic edge detection feature allowing you to quickly scan many documents * Bulk scan to quickly add recto/verso * Import cards from images or even existing PDFBARCODE * automatic detection of barcodes, qrcodes... * manually create a card with a barcode * add as many barcodes as you want to a simple cardPASSBOOK * Full Passbook support * import from .pkpass * view your Passbooks as you would in the official Apple Passbook App * Export and share your passbooks as .pkpass or PDFENHANCE * Improve PDFs quality by applying enhancing filters for color or black & white cards. * Edit crop * Reorder pages, merge cards * Rotate pages * Change brightness and contrast to create beautiful cardsORGANIZE * Create folders with colors for easy access * Sort cards * Name cardsEXPORT * create PDF directly from your mobile device by converting photos, images, other documents, into beautiful and configurable PDFs. * export and share your cards to PDF or JPEG or PNG with your friends, family, colleaguesSEARCH * OCR your cards using offline (to be downloaded first) and open source models in many languages. * Generate searchable PDFs by converting images to text using the powerful OCR models from the Tesseract project.SECURITY * Improve the security of your generated PDF by adding a password.SYNC * Synchronize your cards, PDFs, Images with your computers, other devices or local folder sync. * Sync using WebDAV, Google Drive, OneDrivePRIVACY * Use a free and Open Source card wallet to protect your privacyCOMMUNITY * Provide feedback or even help translate the app. You are part of this project and you make help it grow so that everyone can enjoy the best free and open source card wallet
GitHubIzzyOnDroid
OSS Document Scanner
APK
The OSS Document Scanner is a free and Open Source app to transform your mobile device into a powerful document scanner. SCAN * Scan your documents or receipts with a fast camera scan. * Enjoy the automatic edge detection feature allowing you to quickly scan many documents * Bulk scan documents or book pages * Import documents from images or even existing PDF * You can scan to PDF any kind of document: Receipts, IDs, notes, recipes, photos, business cards, whiteboards, books. You can then use and work with the generated PDFs on all your devices, phones, computers, tablets... ENHANCE * Improve PDFs quality by applying enhancing filters for color or black & white documents. * Edit crop * Reorder pages, merge documents * Rotate pages * Change brightness and contrast to create beautiful documents ORGANIZE * Create folders with colors for easy access * Sort documents * Name documents EXPORT * create PDF directly from your mobile device by converting photos, images, other documents, into beautiful and configurable PDFs. * export and share your documents to PDF or JPEG or PNG with your friends, family, colleagues SEARCH * OCR your documents using offline (to be downloaded first) and open source models in many languages. * Generate searchable PDFs by converting images to text using the powerful OCR models from the Tesseract project. SECURITY * Improve the security of your generated PDF by adding a password. SYNC * Synchronize your documents, PDFs, Images with your computers, other devices or local folder sync. * Sync using WebDAV, Google Drive, OneDrive PRIVACY * Use a free and Open Source document scanner to protect your privacy COMMUNITY * Provide feedback or even help translate the app. You are part of this project and you make help it grow so that everyone can enjoy the best free and open source document scanner
GitHubIzzyOnDroid
OSS Tracker
APK
Android OSS Release Tracker lets you keep track of updates to Open Source Applications directly from their resp. repositories. The application uses the QUERY_ALL_PACKAGES permission in order to fetch the currently installed version of each app in the tracker to compare against. * Subscribe to Android OSS repositories (GitHub and GitLab) * Compare versions with what you have installed on the device * Opens new version in browser for you to install yourself
F-DroidGitHub
OSS Weather
APK
OSS Weather — a lightweight, privacy-first, open-source weather app for Android that gives you fast, clear, and trustworthy forecasts without tracking or ads.Key Android featuresLocal current conditions: temperature, feels‑like, humidity, wind (speed & direction), pressure, and visibility.Hourly, minutely and multi-day forecasts: interactive timelines with up to 48‑hour hourly data and 7–14 day daily summaries (provider dependent).Radar maps: animated precipitation radar (MapTiler), zoom / pan and time layers — note: the map interface currently shows radar overlays.Home screen widgets: multiple widget sizes and configurable layouts for quick glances and real‑time updates.Multiple weather providers: switch between OpenWeather, Open‑Meteo, AccuWeather and Meteo France; supply your own API key if necessary.Offline caching & efficient updates: recent data stays available when connectivity is limited and background refresh is optimized for low battery impact.Customizable UI & appearance: light/dark/auto theme, compact or detailed layouts, and locale‑aware formatting.Privacy & open source: no ads, no tracking or analytics (only optional crash reporting); full source code under MIT license.Astronomy & sun/moon dataSun information: sunrise, sunsetMoon information: moonrise, moonset, moon phase, moon position and related path/visuals.Data you can view (examples)Temperatures: current, hourly, daily high/low, feels‑likePrecipitation: probability, amount, minute‑by‑minute (where supported)Wind: speed, gusts, bearing/directionAtmospheric: pressure trends, humidity, dew point, cloud coverUV index, visibility, and other provider‑specific metricsAir Quality (AQI) and individual pollutant breakdowns when the selected provider supplies that dataSettings & customizationIcons style: choose between multiple icon styles. Supports icon providers from Breezy Weather and Geometric WeatherUnits: temperature, wind, pressure, precipitation, distance, ...Time format: 12/24‑hour toggle and locale‑aware formattingProvider & API keys: choose provider and enter your own API key to avoid rate limits or use the included default key (rate limits may apply)Refresh frequency: configurable background refresh intervals and widget update cadenceWidget options: choose saved location, select displayed metrics, and pick widget style/sizeLocation: use device location (approximate or precise) or add/manage locations manuallyPermissions (minimal)Location (optional): used only to provide local forecasts and radar centered on your locationNetwork / Internet: required to fetch forecasts, maps and provider dataPrivacy & contributions OSS Weather is designed to respect your privacy — no tracking, no ads. The project is open source (MIT). Inspect, fork, report bugs or contribute on GitHub: https://github.com/ossappscollective/oss-weather
GitHubIzzyOnDroid
OSS-Dict
APK
OSS‑Dict is a fast, privacy-friendly offline dictionary reader — a modern fork of Aard 2 with Material design and enhanced features for comfortable reading and lookup. Highlights * Blazing fast searches: punctuation, diacritics and case insensitive — find entries instantly. * Bookmarks & history: save and revisit important articles quickly. * Dictionary management: import, enable/disable and organize multiple dictionary files. * Customizable article appearance: add your own CSS to change fonts, colors and layout. * Beautiful math rendering: scalable, styleable formulas that look great on any screen. * Random article for discovery, volume-button navigation, and fullscreen reading mode. * Clipboard auto-paste and easy external link sharing for fast lookups from other apps. Why OSS‑Dict? OSS‑Dict is designed to work entirely offline — your dictionaries stay on your device for fast lookups and better privacy. It’s lightweight, configurable, and ideal for travelers, students, and anyone who needs reliable dictionary access without an internet connection. Network access The app requests the INTERNET permission for internal use by the built-in renderer and to open external links. This permission is not required for core dictionary lookups — the app functions offline with local dictionary files. Open source OSS‑Dict is open source and available on GitHub. Contributions, bug reports and feature requests are welcome. Get started Install or import your offline dictionaries, customize the look with CSS if you like, and start searching — fast and offline.
F-DroidGitHubIzzyOnDroid
OTG Keyboard
APK
BluetoothConnect lets you use your Android device as A Bluetooth Keyboard, supporting OTG as well.How to usepair Android and other devices, like Windows or iPhone to get the device nameforget this Android on Windows; no need for iPhoneopen this app, choose Windows or iPhone's name to connectif it's Windows, it will pop pair-dialog up, pair it; no need for iPhoneOTG connect this Android with wired keyboard, choose aosp English keyboard as input method on Androidno need to repeat above steps for reopen this app, but if the PC's changed, it needs to repeat it again; no need for iPhoneMore details and hints can be found in the project's Readme.
GitHubIzzyOnDroid
OTR Speed Calculator
APK
OTR SC is a tool to work out the top speed of vehicles in OTR. It lets you calculate the average speed.
GitHubIzzyOnDroid
OUI Lookup and Database
APK
With OUI Lookup you can figure out who manufactured a device simply by inserting its MAC address in the search bar. You can also search for a manufacturer and see its assigned OUIs. Features: Trusted source - The database is sourced from the IEEE to be as correct and updated as possible.Works Offline - OUI Lookup works completely offline, an internet connection is only needed to update the database.Bulk lookup - You can paste a comma/semicolon/whitespace/new line separated list of MAC Addresses to perform a multiple lookup.Auto-paste from the clipboard when there is one or more MAC addressesDark theme is supported
F-DroidGitHub
OW Camera 2 For Pebble
APK
Remote shooting from your Pebble watch. See a live preview of your phone's camera and trigger the shutter from your wrist without touching your phone. Perfect for group photos, selfies, and stable shots! Take photos and videos with complete camera control from the phone - adjust exposure, ISO, white balance, focus modes, and more. Re-released to support the last Pebble smartwatches and added support for camera preview, Supports newer Pebble 2 Duo and Pebble Time 2 Features: - Pebble smartwatch remote shutter and camera preview - Full manual controls from the phone (ISO, exposure, white balance, focus) - Grid overlays and level indicators - And many other camera features and customizations Forked from Open Camera with added Pebble functionality.
F-DroidGitHub
ObjViewer
APK
Copy the .obj file that you want to view (and associated .mtl file, if any) onto a directory named “Models” on the SD card of the Android device. It should then appear in the list that is shown when you select “Open...” from the options menu in ObjViewer. You can interactively adjust the orientation of the object by dragging across the view; drag across the middle part to rotate about the X (horizontal) and Y (vertical) axes, and drag around the periphery to rotate about the Z axis (perpendicular to the view) as well.
F-DroidGitHub
Oblique Strategies
APK
A deck of cards. Over one hundred worthwhile dilemmas. Insights into creative processes. Gnomic challenges, constraints, and questions for you to interpret. First published by Brian Eno and Peter Schmidt in 1975, Oblique Strategies is a tool for working past creative blocks and reorienting (or disorienting) thought processes. This app presents you with a single strategy card at a time. - Swipe to reveal the next card. - Use the back button to bring previous cards back. - Create recurring notifications. - Favorites cards to change how frequently they occur.
F-DroidGitHub
Oblivion
APK
Oblivion is a security-focused Android application that allows a user to lock and wipe a device when a trigger is fired. The application is intended for high-risk situations such as device loss, forced unlock, or temporary loss of physical control. Trigger methods: * Panic button (Quick Settings tile) * Remote message containing a secret code * Trigger when the device has not been unlocked for a configurable period of time Actions: * Perform a factory reset (wipe) Device control is implemented using the Android Device Administration API. The has full support for GrapheneOS. Security notes: * Only encrypted (password protected) devices can guarantee that data cannot be recovered * The application does not function in Safe Mode License Free and Open Source Software GPL-3.0
F-Droid
Obscura VPN
APKDesktopiOS
Privacy-focused VPN with two-party architecture that makes logging impossible.
GitHub
O
ObscuraCam: The Privacy Camera
APK
In a world of viral videos and facial recognition, ObscuraCam helps you share photos and videos while protecting the privacy of you and those you care about. With ObscuraCam you can blur and disguise faces in your photos and videos. Information that could identify you as the cameraperson is removed from the files for added security * PRIVACY FOR YOUR PICTURES: ObscuraCam can be used as a camera to take photos, or to anonymize photos and videos you’ve already taken * DISGUISE YOURSELF: Cover faces with pixelate, redact (blackout) or funny nose and glasses * AUTOMATIC FACE DETECTION: ObscuraCam automatically detects faces in both photos and videos, so you can quickly and easily anonymize a crowd or a long video * MULTIPLE PRIVACY MODES: Faces can be pixelated, removed completely, or disguised with funny nose and glasses. You can also blur everything except a small portion of an image * SHARE SECURELY: We remove all identifying data stored in photos including GPS location data and phone make & model so you can save the protected photo back to the Gallery, or share it directly to Facebook, Twitter or any other "Share" enabled app * PROTECTS THE IDENTITY OF THE PHOTOGRAPHER: Smartphones attach information to every photo they take, including where it was taken and by what type of camera. ObscuraCam removes all of this information * AWARD-WINNING: ObscuraCam was a Winner of the 2013 Knight News Challenge ***Learn More*** * PARTNERSHIP: ObscuraCam is a partnership between the security experts at the Guardian Project and WITNESS.org, a non-profit using the power of video and storytelling to open the eyes of the world to human rights abuses * ABOUT US: Guardian Project is a group of developers that make secure mobile apps and open-source code for a better tomorrow * OUR WEBSITE: https://GuardianProject.info * ABOUT WITNESS: A non-profit using the power of video and storytelling to open the eyes of the world to human rights abuses * WITNESS’ WEBSITE: http://witness.org * ON TWITTER: https://twitter.com/guardianproject & https://twitter.com/witnessorg * OPEN-SOURCE: ObscuraCam is free software. You can take a look at our source code, or join the community to help make Orweb even better: https://github.com/guardianproject/ObscuraCam * MESSAGE US: Are we missing your favorite feature? Found an annoying bug? Please tell us! We’d love to hear from you. Send us an email: support@guardianproject.info face detection, blur, pixelize, human rights, activism, orbot, tor, privacy, obscure, obscura, privacy camera, camera, photo editor, journalist, journalism, photoshop, video, video processing, mosaic, anonymity
F-DroidGitHubguardian
Obsidian
APK
GitHub
ObsidianTodoWidget
APK
Obsidian provides a widget to display an interactive todo list from a markdown file.After having the app installed, start it once to grant it the storage permissions – then the widgets are ready to be used.Setup:Select widget from the widget listDrag to HomescreenEnter the Obsidian Vault name to useConfigure the file to usePress "Select" to define the folder where the file(s) is/are stored.Enter the single filename or enter a date patternIf you want to limit the the tasks to a specific header enter the header name into the "Header" fieldIf you want to include sub Headers check the "Include Sub Headers" switchPress Create
GitHubIzzyOnDroid
Obsqr
APK
Fast and simple QR code scanner that uses the zbar library. Minimalistic design allows you to access QR content with a single tap. N.B QR codes only, not other kinds of barcodes. QR types that can be decoded by Obsqr: * URLs * phone numbers * SMS * geolocations * emails * contact information * applications on Play Store * WiFi configuration * plain text
F-DroidGitHub
ObtainX
APK
ObtainX is a modern, supercharged fork of Obtainium. Re-engineered with a stunning Material 3 Expressive UI and power-user utilities that make managing your apps effortless. Get updates straight from the source: GitHub, GitLab, F-Droid, IzzyOnDroid, APKMirror, APKPure, and more. No central repository, no account, no tracking. 🚀 ━━ ✨ UNIQUE FEATURES (not in Obtainium) ━━ • Build Verification — cryptographic checks (F-Droid/Izzy reproducible builds and GitHub Release Attestations) flag manipulated binaries before install. ObtainX's own updates carry GitHub attestations too. • Third-Party Installer Support — hand off updates to installers like InstallerX or App Manager to review APK metadata the stock installer hides. Essential under Advanced Protection. • Bulk Import from Device — select apps already on your phone and ObtainX finds their sources automatically — no URL hunting. • Dynamic Folders — named folders, manual or rule-based (by name, author, package ID, category, or source); each keeps its own layout. • On-Demand Only mode — hide rarely-updated apps from the main list and skip them in global scans; check them only when you want. • Configurable swipe gestures — independent left/right actions per row: Update, Install, Pin, Edit, Delete, and more. • Custom app icons — set your own icon for any app, from your gallery or the web. • Undo after delete — swipe- and bulk-delete show a 5-second Undo snackbar. • Verified "also available on" links — each app shows other stores where it's confirmed present. • RegEx Assist — a built-in helper walks you through building version and APK filters — no regex knowledge required. • Know the update size beforehand — see the exact download size before updating. • Skip Version — pass on a release without marking the app "updated." • Stop download — cancel any ongoing download from the app, notification, or queue. • Save assets — save downloaded APKs to a folder of your choice during the update. ━━ 🔧 ENHANCED FEATURES ━━ • APKMirror updates — enabled (disabled upstream), opening the specific release page. • Smarter version status — six distinct states instead of a binary update / up-to-date. • Add App — three paths, one screen — URL, Search, and From Device under one segmented control, results inline. • Editable package ID for track-only sources — restores correct install detection and updates. • Active filter chips — a dismissible chip per active filter; tap to clear it. • Category customization — any color, rename, and bulk assign. ━━ 🎨 UI & UX ━━ • Adaptive tablet, foldable & landscape layout — on large screens a navigation rail replaces the bottom bar and your app list sits side-by-side with the detail page, opening apps in place. Adding and bulk-importing go two-pane too, and adapt in landscape — so big phones and foldables benefit, not just tablets. • Material 3 Expressive across every screen — cards, fluid animations, expressive controls. • A full theme engine — system/light/dark/AMOLED themes, Material You or any hex color, 9 palette algorithms, shading, gradients, progressive blur, corner roundness, and UI scale. • Per-app color theming derived from each app's own icon. • Customizable app rows — app type, source, and category at a glance, as text badges or minimal color strips. • Hero icon transitions, inline collapsible search, inline edit on the detail page, source favicon badges, and auto-hiding action bars. ━━ 🔄 BRING YOUR DATA FROM OBTAINIUM ━━ In Obtainium, export your app list to a .json file (Import/Export → Export). In ObtainX, open the Backup tab and Import it — your tracked apps populate instantly. ━━ 🛡️ FREE & OPEN SOURCE ━━ Free and open-source software (GPLv3). Runs entirely on-device — no accounts, no telemetry, no proprietary services.
F-DroidGitHub
Obtainium
APK
Obtainium allows you to install and update Apps directly from their releases pages, and receive notifications when new releases are made available.Read the WikiCurrently supported App sources:Open Source - General:GitHubGitLabForgejo (Codeberg)F-DroidThird Party F-Droid ReposIzzyOnDroidSourceHutOther - General:APKPureAptoideUptodownitch.ioHuawei AppGalleryTencent App Storevivo App Store (CN)RuStoreAPK4FreeFarsroidCoolApkLiteAPKsJenkins JobsAPKMirror (Track-Only)RockMods (Track-Only)Other - App-Specific:Telegram AppNeutron CodeDirect APK Link"HTML" (Fallback): Any other URL that returns an HTML page with links to APK filesLimitations:For some sources, data is gathered using Web scraping and can easily break due to changes in website design. In such cases, more reliable methods may be unavailable.
F-DroidGitHubIzzyOnDroid
Oburo.O
APK
Your personal attendance recorder where you can clock in working hours.
F-DroidGitHub
Occtax-mobile
APK
Occtax-mobile allows you to enter observations of fauna and flora in the Occtax module of GeoNature. It must be connected to a web instance of GeoNature by entering its URL during the first launch.
GitHubIzzyOnDroid
OceanNex for DigitalOcean
APK
A powerful native Android app to control your DigitalOcean droplets, domains, managed databases, firewalls, volumes and more... Features - Multiple accounts support - Theme to blend with your system UI (dynamic colors) - Biometric support for security - Set your default home screen - Change to your native language, if available - Dashboard to view all important info - Create and view droplets - View all events - View and create firewalls - Manage domains with records - Reboot, rebuild, delete, destroy, rename, reset password of droplet and more.. - Enable and manage droplet backups - Manage droplet snapshots - View regions, OS images and marketplace apps, plans and sizes - View and create VPCs - Manage and create your certificates - Add and manage your uptime checks - View, manage, add, delete managed cluster databases - Add and remove users and databases for a database cluster - View billing info, invoices and recent history - Download invoices as PDF - Create and manage your projects - and many more... Complete list of features: https://codeberg.org/swatian/OceanNex/wiki/Features Source code: https://codeberg.org/swatian/OceanNex Developer: https://mastodon.social/@mmarif
F-Droid
Ocelot
APK
A chat client for the Lichat protocol. This supports the full Lichat 1.3 protocol, including the extensions for data, emotes, and backfill.
F-DroidGitHub
Octal Sun Time
APK
A clock that shows the octal solar time of your chosen location. Octal solar time is a location-specific time system that defines a day as the time between two consecutive solar midnights. Known to contain 24 hours in the regular clock system, a day is divided into 8 equally long octal hours. Each octal hour is divided into 64 equally long octal minutes. Each octal minute is divided into 64 equally long octal seconds. The clock is visualized by an hour finger that runs one cycle per day, with 0 (solar midnight) at the bottom and 4 (solar noon) at the top. In addition, the octal hour and minute is also shown digitally as a three-digit octal number in the center. A golden arch visualizes the time between sunrise and sunset. Locations can be managed and chosen. Locations can be added by an online search function backed by wikidata. Privacy notice: When using the location search function, the app connects to a wikidata server and shares your typed search term in order to get search results. This is the only situation when the app uses internet connection.
F-DroidGitHub