FOSS apps: free and open source

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

page 20

Colemak Mod-DH Keyboard

The Colemak Mod-DH layout for physical keyboards connected via USB
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Collect the Cookies!

Collect cookies in this fun idle-ish game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Collective Club Maze

A game similar to the board game ricochet robots.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Colony Control

Management and tracking of ant colonies with NFC and QR.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
ColorBlendr

Express yourself with colors
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Colorful

Simple 2D side-view shooter
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Colorgram

A free, open-source color logic puzzle game with no ads or tracking
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Coloring Book

Coloring book - pictures from examples and photos
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Colors Overflow

Colors Overflow is a very simple but very addictive board game developed by Velb
- Games
- FOSS
- Free
- No tracking
- Android only
F-Droid Zapstore
Colota - GPS Location Tracker

Self-hosted GPS tracker. Open source, geofencing, offline mode, no telemetry
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Com-Phone Story Maker

Create, tell, share and enjoy multimedia digital stories
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Coma Phone

Auto-answers calls on speakerphone. Always hear your friends talk, even while in
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
CoMaps - Hike, Bike, Drive Offline with Privacy

Easy map navigation - Discover more of your journey - Powered by the community
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Comfort Reader

Streams text directly to your eyes
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
ComfyChair

Native Android client for ComfyUI - generate AI images and videos on mobile
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Commons

Upload images to wikimedia.org
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Compass

A simple and clean compass
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Compass

Compass with a range of styles
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Compete

Challenge everyone!
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid Zapstore
Competition Radio Trainer HFLÜ

Training for the Hessische FW-Leistungsübung: practice key calls and commands.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Complica4

Puzzle game
- Games
- FOSS
- Free
- No tracking
- Android only
F-Droid
Compose Stopwatch

Stopwatch in the Material You theme, designed for ease of use and best features
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Compound Calculator

Simple offline compound interest calculator
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Computational Demonology

Battle Lovecraftian horrors with this set of algorithms
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Conceal

Concealing WAVE audio files inside images
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Conceal Authenticator

Secure 2FA authenticator with blockchain backup and encryption.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Conceal Mobile

Secure mobile client for the Conceal Network web wallet.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Conduit

SSH, Mosh, SFTP & local Linux terminal
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
cone

Data entry tool for the plain text accounting ledger format
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Connect You

Privacy focused contacts and SMS messenger app build with MD3
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ConnectBot

Simple, powerful, open-source SSH client for Android
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Conscrypt Provider

Conscrypt Provider provides TLS 1.3 to apps supporting older Android devices
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
ConsoleFlow

Developer browser with automatic Eruda console injection
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Constanza - Good habits

Habit reminders you answer without opening the app. No cloud, no ads.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Contacts

Contacts Organised by Group
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Contacts Import

Import your CSV contacts from a desktop client without any cloud syncing.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Contextium

Configurable Android context menu helper
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Controller for QLC+

An Android native 3rd party application for controlling QLC+ v4.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Controlloid

Turn your phone into a real game controller for PCs
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Conversations

Encrypted, easy-to-use XMPP instant messenger for your mobile device
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Converter NOW: Unit Converter

A simple, immediate and fast unit converter!
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Cookie Extractor

Extract your own session cookies after a manual login
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Cool Mic

Icecast source client
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Coordinate Joker

A geocaching add-on – generates waypoints from formulas with up to 2 variables
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Coppelia

Beautiful, native Jellyfin music player
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Coptic for AnySoftKeyboard

AnySoftKeyboard Coptic Language pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Copy SMS Code - OTP Helper

an open-source app that can detect and copy any code for you
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
C
Cosmic IDE

A full fledged Java and Kotlin IDE for Android devices.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub