Apps
OpenDocument Reader - view ODT
APK
View and modify documents created using LibreOffice or OpenOffice on the go using the Document Reader & Document Editor!📄🚶 The file reader & document editor allows you to open files like ODF (Open Document Format) documents created using LibreOffice or OpenOffice wherever you are. In the bus on your way to school wanting to look at your notes before the big exam? No problem! With the Document Reader you can open files wherever you like and read & search through your documents to go in a clean and simple way. Is there just one last typo left to fix in your document before sending it out to colleagues? The File Editor supports modification of documents now! Fast, simple and well integrated. You can open files from ODF (ODT, ODS & many more) that you have created with Libre Office or OpenOffice also from within other apps. Supported apps include GMail, Google Drive, iCloud, OneDrive, Nextcloud, Box.net, Dropbox and lots of others! Or use our integrated file explorer instead to open files on your device. THE ALL IN ONE DOCUMENT READER AND DOCUMENT EDITOR 📄 ➡️open files with ODF: ODT (writer), ODS (calc), ODP and ODG without a hassle ➡️basic editing of documents with the file editor to fix typos, add sentences, etc ➡️securely open password-protected documents ➡️search for keywords in your ODT (writer), ODS (calc) or ODG and highlight them ➡️print documents if your device is connected to a printer ➡️read your documents in fullscreen to avoid distractions ➡️select and copy text out of your documents ➡️enjoy your documents even without internet connectivity - fully offline capable ➡️read out aloud your documents using Text-To-Speech technology DOCUMENTS TO GO - WHEREVER YOU LIKE 🚶 In addition to that, the document reader & document editor aims to support various other file formats as well as possible: - Portable Document Format (PDF) - Archives: ZIP - Images: JPG, JPEG, GIF, PNG, WEBP, TIFF, BMP, SVG, etc - Videos: MP4, WEBM, etc - Audio: MP3, OGG, etc - Text files: CSV, TXT, HTML, RTF - Microsoft Office (OOXML): Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX) - Apple iWork: Pages, Numbers, Keynote - Libre Office and Open Office ODF (ODT, ODS, ODP, ODG) - PostScript (EPS) - AutoCAD (DXF) - Photoshop (PSD) This app is open source. We are not affiliated with OpenOffice, LibreOffice or similar. Made in Austria. Ads are shown in order to support the development of this app. They are free to remove temporarily via the in-app menu. We highly appreciate all kinds of feedback via email. ODF is the format used by office suites like Open Office and Libre Office. Text documents (Writer, ODT), as well as spreadsheets (Calc, ODS) and also presentations (Impress, ODP) are supported, including support with the file editor for complex formatting and embedded images. Graphs are no problem either. If you want to secure your data you can even open password-protected documents. Other applications that are using this format are LibreOffice, OpenOffice, NeoOffice, StarOffice, Go-oo, IBM Workplace, IBM Lotus Symphony, ChinaOffice, AndrOpen Office, Co-Create Office, EuroOffice, KaiOffice, Jambo OpenOffice, MagyarOffice, MultiMedia Office, MYOffice, NextOffice, OfficeOne, OfficeTLE, OOo4Kids, OpenOfficePL, OpenOfficeT7, OxOffice, OxygenOffice, Pladao Office, PlusOffice, RedOffice, RomanianOffice, SunShine Office, ThizOffice, UP Office, White Label Office, WPS Office Storm, Libre Office, Collabora Office and 602Office.
F-DroidGitHub
OpenDrummer - Drum Loops
APK
Collection of drum loops in various styles and tempos, designed to enhance your practice by providing solid, high-quality grooves. All loops are audio files converted from MIDI using premium soundfonts. The tempo can be adjusted by up to 10% in either direction; however,this alters the pitch, so use this feature with caution.
F-Droid
OpenFoodFacts
APK
Scan food products or their barcode to obtain data on ingredients, additives, allergens, nutrition facts… The app allows to view the 3.000.000 products already contained in the free and open database Open Food Facts. More importantly, it also lets you easily be part of the solution: * contribute pictures and data for missing products * team up with the Open Food Facts Artificial Intelligence by answering its blue questions You will get: * The Nutri-Score grade, from A to E : Nutritional quality * NOVA groups, from 1 to 4 : Avoid ultra-processed foods (Group 4) * CO2 levels and Eco-Score: find the environmental impact of food * Vegan, vegetarian and palm-oil detector * Allergens, labels (bio, gluten free, vegan, vegetarian, halal, kosher ...), traceability information (packaging codes, origins of ingredients). To discover the Open Food Facts and Open Beauty Facts projects and help us open food and cosmetics, please visit openfoodfacts.org where you can discover how to contribute.
F-DroidGitHub
OpenFool
APK
OpenFool is a free and open source Fool (Durak) card game for desktop and Android. Features * Individual game for 2 to 5 players and 4-players partnership game * 52-card decks: Standard Russian (designed by A. Charlemagne in 19th century, public domain - from Wikimedia), international (by Chris Aguilar - LGPL v3), French deck (by David Bellot - LGPL v3) * Standard rules for throwing in (some convention can be customized)
F-DroidGitHub
OpenGPX
APK
N.B Switch to the OpenStreetMap map provider in settings. The app will crash if you try to use Google Maps and you don't have that installed. * Copy gpx files to the folder /sdcard/gpx (or /sdcard/download) * Optional: create / edit the text file /sdcard/gpx/info.txt (e.g. your personal cache search order) * Run OpenGPX Variation 2 (faster imports): * Create a cache database by using the Cache Database Management tool * Copy database.db4o to /sdcard/gpx/database Variation 3 (Online): * Use the "Search Online" feature (requires a free account at bcaching)
F-Droid
OpenHIIT
APK
Elevate your fitness routine with OpenHIIT, the ultimate open source workout interval timer app. Designed for High-Intensity Interval Training (HIIT), this powerful tool helps you optimize your workouts and embrace the spirit of collaboration.OpenHIIT is ad free and will never offer in-app purchases or a paid version.🏋️♂️ Workout Intervals: Set high-intensity and rest periods that align with your fitness level, allowing you to push your limits and maximize results.⏱️ Precise Timing and Intuitive Controls: Experience seamless workout sessions with accurate timing and intuitive controls. OpenHIIT ensures precise intervals, letting you focus on your exercises without any distractions. Stay in the zone and maintain a consistent rhythm throughout your workout.🔊 Audio and Visual Cues: Stay informed and motivated during your workouts with audio and visual cues. OpenHIIT offers clear auditory signals and visual indicators, keeping you aware of interval changes without needing to constantly check your device. Maintain your momentum and never miss a beat.🌍 Open Source Community: Embrace the power of collaboration and be part of the OpenHIIT open source community. Contribute to the app’s development, suggest enhancements, and share your ideas with fellow fitness enthusiasts. Together, we can shape the future of workout interval timers.Download OpenHIIT now and experience the freedom, flexibility, and efficiency of an open source workout interval timer. Take control of your HIIT sessions, surpass your limits, and unlock your full fitness potential. OpenHIIT is here to support you on your fitness journey.Note: OpenHIIT is an open source project developed by one person, along with some help from the community, that is committed to providing a high-quality app that respects intellectual property rights.
GitHubIzzyOnDroid
OpenHub
APK
An open source GitHub Android client app, faster and concise. Features: * Project use MVP+dagger2+retrofit framework,save Activity,Fragment,Presenter data when onSaveInstanceState; * On the basis of Retrofit2+RxJava,load cache first if cache available,then load from network,better user experience; * Support the theme switch,16 kinds of accent color switch,language switch; * Support the trending repositories view,every one hour,the server update data at a time; * Start immediately show the splash screen,no bad time; * Faster and cool syntax highlighting; * And more...
F-DroidGitHub
OpenJot
APK
OpenJot is an open-source journaling app built with a minimal UI, focused on privacy and simplicity. Everything is stored securely on your device—never in the cloudKey Features:📝 Rich Text Editing: Express yourself with a powerful editor supporting styles and formatting.🖼️ Media Support: Attach photos, videos, and voice recordings to your entries.🔒 Privacy First: Your data stays on your device. Secure your journal with biometric authentication.📍 Location Tagging: Remember where your memories happened with integrated maps.📂 Save entries as PDF: Save your entries as PDF🎨 Beautiful UI: A clean, distraction-free interface with a focus on typography and ease of use.OpenJot is completely offline and respects your privacy. No tracking, no cloud syncing, just you and your thoughts.
GitHubIzzyOnDroid
OpenKeychain: Easy PGP
APK
OpenKeychain helps you communicate more privately and securely. It uses encryption to ensure that your messages can be read only by the people you send them to, others can send you messages that only you can read, and these messages can be digitally signed so the people getting them are sure who sent them. OpenKeychain is based on the well established OpenPGP standard making encryption compatible across your devices and systems. For a list of compatible software for Windows, Mac OS, and other operating systems consult http://openpgp.org/software/. Modern encryption is based on digital “keys”. OpenKeychain stores and manages your keys, and those of the people you communicate with, on your Android smartphone. It also helps you find others’ keys online, and exchange keys. But its most frequent use is in using those keys to encrypt and decrypt messages. ★ Integration with other Apps: • K-9 Mail • Conversations • and many more… ★ Open Source: OpenKeychain is designed to be trustworthy. It’s Free Software with no secrets; anyone can examine and validate every bit of it (Source code available at https://github.com/open-keychain/open-keychain) ★ Independent Security Audit: The auditing company Cure53 performed an intensive security audit of OpenKeychain. The security experts summarize their final result with "[...] none of the spotted issues were considered to be of a critical severity in terms of security implications. The latter is a significant and impressive result for an app of this complexity and relevance." ★ Permissions: Because OpenKeychain is Free Software, anyone can validate that the permissions are indeed only required for the listed features. • In-app purchases: Donate to the developers • Identity: Pre-fill name and email addresses • Contacts: Connect keys to your contacts (only offline) • Photos/Media/Files: Import/export keys from SD card • Camera: Scan QR Codes to add other people's keys • Others: Internet permission to retrieve keys, NFC permission to use YubiKeys Starting with Android 6, permissions are requested when required in-app!
F-DroidGitHub
OpenLynx
APK
A FOSS application used for navigating the public transit systems using live GTFS data. - Favorite Routes - Saved Locations - Manage Tickets & Passes - Advanced Trip Planning Currently, not all cities are covered. This app will help with the Lynx bus system in Orlando, Florida. Want this for your city? It really is very easy! Open an feature request issue on the source code repository. This is not a map app. Please use OSMAND+ available on f-droid.org.
F-Droid
OpenMW
APK
[Note: The upstream repo was replaced with @xyzz's one, where the Android app is developed, it's recommended to install https://f-droid.org/packages/is.xyz.omw instead] OpenMW is an open-source, free-software game engine that reimplements the one powering Bethesda Softworks' 2002 open-world role-playing game Morrowind. This is an OpenMW port for Android, adapted to be played with touchscreen or remote controller. To play it, you need to use your own, legally acquired Morrowind data files.
F-DroidGitHub
OpenMapKit
APK
OpenMapKit (OMK) is an extension of OpenDataKit allowing users to create professional quality mobile data collection surveys for field data collection. OpenMapKit launches directly from OpenDataKit when the OSM question type is enabled in a standard survey. Simply include OSM questions and tags in your survey to collect information on OSM in the field. Traditional field data collection tools for OpenStreetMap have either relied on paper or are too complicated, targeted at GIS professionals, or lack an understanding of traditional survey techniques. As new projects such as Missing Maps and other humanitarian field data collection projects focus on field data collection the need for a structured, yet simple, OpenStreetMap field data collection tool became apparent. OpenMapKit serves this need. * View OpenStreetMap tiles via web and pre-cached mbtiles. * Download OSM data from the Overpass API for offline use. * Create and update tags for OSM features. * Integration with ODK Collect.
F-DroidGitHub
OpenMensa
APK
OpenMensa zeigt dir, was es heute in der Mensa Deiner Uni zu essen gibt. Zur Zeit werden rund 150 Mensen im deutschsprachigen Raum unterstützt. Diese App stellt dabei eine Verbindung zur Datenbank auf http://openmensa.org/ her. Features: - Speiseplan und Preise für hunderte Mensen - Vorschau der nächsten Tage - Mehrere bevorzugte Mensen festlegbar - Funktioniert auch, wenn man nicht mit dem Internet verbunden ist - Mensa auf einer Karte, Tippe auf Adresse um zur Mensa zu navigieren Melde Fehler auf https://github.com/domoritz/open-mensa-android/issues. Deine Mensa fehlt? Mit etwas technischem Wissen, sollte es Dir leicht fallen, einen Parser für Deine Mensa zu schreiben. Weitere Informationen auf http://openmensa.org/. Im Moment unterstützt die App Mensen an vielen deutschen Universitäten unter Anderem in Berlin, Hamburg, Aachen, Karlsruhe und München. Außerdem die Mensen an HPI, KIT, LMU, HU und der FU.
F-DroidGitHub
OpenMoneyBox
APK
OpenMoneyBox is an application designed to manage small personal money budgets in the easiest way.
F-Droid
OpenMultiMaps
APK
OpenMultiMaps is an application that allows to display maps from OpenStreetMap and to quickly switch from a map to another one. Maps are grouped in categories: - Trips - Life-skills - Hobbies - Regional maps - Contributions Each of these categories contain several maps allowing to use the current location.
F-Droid
O
OpenNIC
Web
User-owned DNS network offering privacy-respecting alternative to ICANN nameservers.
OpenNavBar
APK
OpenNavBar is an open-source and customizable navigation bar for Android.Features:Background and button custom colorsButton padding and sizeSwap back and recents buttonsSwap back and recents in landscapeUse custom button images with masking supportAuto-hide navbarTogglable haptic feedbackLong press / slide actions:All Android versions: None, Back, Home, Recent Apps, Notifications, Quick Settings, Power Menu, Hide NavbarAndroid 9+: Lock Screen, Take ScreenshotAndroid 12+: All Apps DrawerAndroid 15+: Media Play/Pause, System MenuTechnical advantages:Low size (approx. 4MB), minimal dependenciesNo data collection
IzzyOnDroid
OpenOrienteering Mapper
APK
OpenOrienteering Mapper is an orienteering mapmaking program and provides a free and open source alternative to existing commercial software. OpenOrienteering Mapper runs on Android, Windows, macOS and Linux.While it is under continuous development and considered in beta state, it has been used to produce maps for classical orienteering, MTBO and radio orienteering races. All required functions for drawing maps are implemented and the program works very stable. So it can be considered ready for productive use, although it is like always a good idea to keep backups of your files. We are happy about feedback to the program.
GitHubIzzyOnDroid
OpenPaperView
APK
OpenPaperview's purpose is to browse, search in, download and display or send OpenPaper.work documents. A static HTTPS server is required but the application is designed to be useable offline with configurable pre-download and local full-text search. See full setup instructions. The camera permission is only used for the (experimental) pairing with Paperwork
F-DroidGitHub
OpenPass
APK
MobilePass is a one-time password generator for 2-factor authentication used in various remote access systems. OpenPass is a fully compatible reimplementation.
F-DroidGitHub
OpenPhotoFrame
APK
OpenPhotoFrame is a free, open-source slideshow app that syncs photos from your private cloud (Nextcloud) or local storage. No ads, no subscriptions, no nag screens – just your photos. Features: • Beautiful Slideshow – Smooth crossfade transitions between your photos • Nextcloud Sync – Sync photos from a Nextcloud public share link (WebDAV) • Local First – Works offline, photos are cached locally • Simple Settings – Configure slide duration, transition speed, and sync interval • Always On – Designed to run 24/7 as a dedicated photo frame • Privacy First – Your photos stay on your server, no third-party cloud required Why OpenPhotoFrame? Existing apps like Fotoo or PhotoCloud Frame Slideshow are either riddled with ads and nag screens, require paid subscriptions for basic features, or force you to use public cloud services like Google Photos. OpenPhotoFrame is different: • 100% Free & Open Source (GPLv3) • No ads, no in-app purchases, no tracking • Works with your self-hosted Nextcloud • Simple & focused – does one thing well
F-DroidGitHub
OpenPillReminder: Birth Control Pill Tracker
APK
OpenPillReminder is a simple and reliable way to stay on track with your birth control routine. Setup takes just a moment; select the type of pill pack you use (number of pills) and choose the time you usually take your pill. From there, Open Pill Reminder will send you discreet notifications so you never miss a dose. You can also easily view the status of your current pack at any time. OpenPillReminder helps you manage your birth control routine with ease—simply, effectively, and for free (no ads either). Features: - Daily reminders so you don’t forget your pill - Automatic pause of reminders on days when no pill is required - Notifications instead of intrusive alarms - Alerts when it’s time to start a new pack or purchase more pills - Customizable pack size to support all types of birth control pills - Clear display of your current pack status Note: Certain device settings or third-party apps may interfere with notifications. OpenPillReminder should be used as a supportive tool and not as your sole reminder system. We are not responsible for missed pills due to notification issues.
F-DroidGitHubIzzyOnDroid
OpenPods
APK
The Free and Open Source app for monitoring your AirPods on Android. Features: * Shows a notification with AirPods status when they are connected * Respects your privacy * Free and Open Source software * Supports Dark Theme Supported devices: * Apple AirPods 1st gen * Apple AirPods 2nd gen * Apple AirPods 3rd gen * Apple AirPods Pro * Apple AirPods Max * Beats X * Beats Flex * Beats Solo 3 * Beats Studio 3 * Powerbeats 3 * Powerbeats Pro
F-DroidGitHub
OpenRec
APK
OpenRec is a minimal, open source, offline audio recording app.Features:Material designOfflineWorks on Android 6.0 and above devicesSupports both light and dark themeNo adsNo collection of personal dataPrivacy policy is mentioned here.
GitHubIzzyOnDroid
OpenRedmine
APK
Connect to Redmine servers (running 1.2 or later) and access the Wiki, Issue Tracker, Source code, etc. easily. Features: * View issues offline * Get API key from web site * Filter (by Status/Tracker/Category/Priority) * Download files * Wiki * Connect to unsafe SSL sites powered by transdroid
F-DroidGitHub