FOSS apps: free and open source

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

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aaaaa

a minimalist keyboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
AAAAXY

A nonlinear 2D puzzle platformer taking place in impossible spaces.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Aalener Optik-Formelrechner

Quick and easy calculate a bunch of optical functions
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
A
Aard 2

Offline dictionary
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
AAT Another Activity Tracker

GPS-tracking application for sportive activities, with emphasis on cycling.
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
ABCore

Bitcoin Core wrapper
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Abstract Dots and Lines

Abstract Dots and Lines is a libre implementation of a pen-and-paper game.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Accelerrace

Simple HTML5 racing game made just for fun.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Accessibility Button Launcher

Assign one app to the Android accessibility button or shortcut
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Accordion
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Achie

It's a simple app for registering achievements
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Acho

Lightweight WebView client for Acho Chat
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Acode IDE: Terminal & AI Code

Code editor for Android with Linux terminal, Git, plugins and AI tools.
- System & tools
- FOSS
- Free
- Paid
- In-app purchases
- No ads
- No tracking
- Android only
Google Play F-Droid GitHub Zapstore
Acoustic

Simple internet radio application for Android
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Acrylic Paint

Simple finger painting
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Activity Launcher

Create shortcuts for apps and activities
- System & tools
- FOSS
- Free
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Activity Manager

Advanced activities and shortcuts launcher
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Activity Trace

Find something you saw on your phone — privately and on-device.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ActivityWatch

Track how you spend your time on your devices.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Actualizador ODNS
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Acutis Firewall

Parental control app that blocks adult content and dangerous sites on-device.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Ad-Free

AdBlocker for Spotify
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Ad-silence

Silence ads in Accuradio, Spotify.. or any Custom App. Lightweight under 150KB.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Adaptive Brightness Tile

Quick settings tile for adaptive brightness
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Adaptive Theme

Auto-switch dark theme & wallpapers using the ambient light sensor
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
AdaptKey

Privacy-first Android keyboard that learns your typing style. Fully offline.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
AdAway

A free and Open Source ad blocker for Android.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ADB Captain

Run ADB commands on your phone. No root, no PC — via Shizuku.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ADBio

Widget that enables/disables the Android Debug Bridge (ADB)
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
ADBKeyBoard

Android Virtual Keyboard Input via ADB
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
ADBungFu

superuser ADBcmd appOps freezer ^4 root ed :# su Magisk (aosp/opPerms)
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
AddictoLogs

Activity tracker for your bad habits
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
AddisMapTransit

AddisMapTransit is a trip planner for Addis Ababa's public transport
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub
addy.io

Anonymous Email Forwarding
- Communication
- FOSS
- Free
- In-app purchases
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
A
AdGuard Content Blocker

Ad blocker app to block ads in Yandex Browser and Samsung Internet browser only
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Adiresy

Find, share and navigate to Madagascar's community address codes
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
AdminControl

Additional security settings
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Adnihilation

This is just a very small app to allow you take out on those nasty ads.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Adresilo

Search for places
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Advanced Charging Controller (ACCA)

AccA empowers users to have full control over the device charge cycle.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Advanced PassGen

Generate passwords with ease.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Advanced PortChecker

Check if TCP ports are open.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Aegis Authenticator

Free, secure and open source 2FA app to manage tokens for your online services
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
A
AELF - Bible and day's reading

A simple and discrete daily reading application
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Aeon's End

Unofficial market setup randomizer for boardgame Aeon's End
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Aer - Fork of Anemo

Private storage utility for android with support for external storage media
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Aerial

Just radio.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
AF Weather Widget

Graph weather widget for Android
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore