FOSS apps: free and open source

Free and open-source software: the source code is public under an open licence.

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OnePlus Flash Control

Advanced LED control for OnePlus (root required)
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OnePlus Laser Tool

Professional laser rangefinder for OnePlus devices with Laser AF hardware.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OneShot

Remember the happy days!
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
OneTimeAlarm

Alarm reminders which delete themselves automatically after firing.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
OneTwo

Provides you with dices, counter and timers
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
OnionShare

Securely and anonymously share files using the Tor network
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Onloc

Self-hosted real-time device tracker.
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OnStop2FinishAndRemoveTask

If change other app, Auto close task in prev app. Required Shizuku APP.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OnTime - Presentation Timer

Presentation timer for speakers at live events
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
ONVIF Camera

Simple RTSP viewer for IP cameras
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Onyx

Your new app to guide you around La Doua Campus
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OONI Probe

Measure Internet Censorship, Speed & Performance
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
OOS Firmware Extractor

Extract firmware from official Oneplus roms
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Open 100x

Extreme 100x hybrid zoom camera with local image processing.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Open Alert Viewer

Fetch and display server alerts
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open Biking

Bluetooth application for generating training on an indoor bike (CBC Pro-form)
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open Camera

Camera App
- Multimedia
- FOSS
- Free
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Open Chaos Chess

A chess game with randomized moves
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Open Ear

ear training app for musicians
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Open FNDDS Viewer

Displays information from the USDA's Food and Nutrient Database for Dietary Stud
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
O
Open Golf

A mini golf game currently featuring about 20 levels
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Open Hitomi

Floating hedgehog assistant with local chat and browser tools
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open In WhatsApp

Open Chat in WhatsApp
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open Link With...

Open links in native apps when you're stuck in the browser! 🚀
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open Map

OpenStreetMap map viewer
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
OPEN NGA

Third-party client for bbs.nga.cn
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Open Note Scanner

Scan documents, handwritten notes or arts
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Open Passkey Authenticator

App for managing passkey integrating in the Android Credential Manager.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open Patience

Free, open-source Klondike & FreeCell solitaire — no ads, no tracking
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Open Pet Food Facts

Look up pet food ingredients, allergens, nutrition facts
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Open Pros & Cons

A simple and free pros and cons app.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Open Recorder

Open-source screen recorder with internal audio and no internet access
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Open Stable Diffusion

An app for generating images using AI
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Open Sudoku

Open Sudoku is an Open Source Sudoku game.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Open Surge: retro game engine

A retro game engine with a fun platformer inspired by 16-bit Sonic games.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Open TeleScope VR

A VR-based digital telescope camera application for people with low vision
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Open TimeLimit

Simply limit the usage duration
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Open Video Editor

Open source Android video editor, built with Media3 and Jetpack Compose.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
open2share

Enable sharing files from every app (like WeChat)
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OpenArcade

OpenArcade is an open-source game arcade for Android.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
OpenAvisio

Beta companion for your self-hosted OpenAvisio medical-record instance
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
OpenBeautyFacts

Look up cosmetic
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
OpenBible

OpenBible provides the Bible with as little distractions as possible
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
OpenBike

A lightweight, open-source NextBike client for Android
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
OpenBooksDownloader

This is an app that uses dbooks.org api to download open published books.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
OpenCalc

Simple and beautiful calculator for Android
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
OpenCamera Sensors

Synchronized recording of video and IMU data with advanced camera options
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
OpenCloud

File Sync, Workspaces, Smart Search & Web Office
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore