FOSS apps: free and open source

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

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GuitarFretboardTrainer

Learn the notes on the guitar fretboard.
- Multimedia
- FOSS
- Free
- No tracking
- Android only
F-Droid
Gurgle

Word game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Gym Bott

Local-only exercise and routine tracking app to organise your gym workouts.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
GymLog

Simple offline workout tracker. No accounts, no cloud, no tracking
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
GymLoga

Simple, native, and private workout logger for strength training.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
GymMane

Dark, offline gym log. Tap the muscle, log your sets, watch your numbers move.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
GymRoutines

Open-Source fitness tracker for Android.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
G
GymWen

Official App for the Gymnasium Wendelstein
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
HA Bluetooth Proxy

Home assistant Bluetooth proxy Companion
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Habit-Maker

A reward-based habit tracker for android.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Habits

Habits is an app for tracking and helping to maintain good habits.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
HabsGleich

HabsGleich is a mini diary with a mind test included.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Hacker for AnySoftKeyboard

AnySoftKeyboard Hacker Keyboard layout pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Hacker's Diet Offline

This is an offline version of the Hackers Diet Online.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid Zapstore
Hacker's Keyboard

Four- or five-row soft-keyboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Hacki for Hacker News

An open-source Hacker News client.
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Hackover 2026 Schedule
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
H
HACS

Hackspace Access Control System
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Hail

Freeze Android apps
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Haircomb

Haircomb crypto currency wallet, core and a blockchain syncing software.
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
H
Halachic Prayer Times

Times for Jewish prayers
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
HalfDot for Umami

HalfDot is a minimalistic client for Umami Analytics
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Halma

Chinese checkers (Halma) to play with friends. Try this strategy board game now!
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Haltestellenanzeige (Display Monitor)

Displays the departure times of all stops in Germany (Display Monitor).
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Ham Test

Prepare for and pass all three US Amateur Radio license exams
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Hamburger

An open client app for the news by the oldest German TV station.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Hamfisted

Prepare for the German HAM radio license exam
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Hammer

A simple tool for building stories.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
HAMtrainer

Study for the American HAM radio license exams
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Handy Reading

Feature-rich, pure (offline) reading experience on all Your interests.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Hanuman Chalisa

Voice and text parts of the Hanuman Chalisa
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
HappyTaxes

Private bookkeeping for freelancers, small business, or personal finances.
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Harbor

Local, FOSS work-profile isolation and app management
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
H
HardWhere

Asset management app for snipe-it, requires a custom setup
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Hash Droid

Verify file integrity
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Hate It Or Rate It

Track and decide: Love it or leave it with every purchase.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
H
Hauk

Self-hosted real-time location sharing
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Haven

Isolate and run multiple instances of apps using Work Profiles
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Haven SSH Client

SSH terminal, Wayland desktop, VNC/RDP, cloud storage & SFTP for Android
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Hawaiian for AnySoftKeyboard

AnySoftKeyboard Hawaiian Language pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Hazel

Download video and audio from over 1000 sites, powered by yt-dlp.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Headi - Your headache diary

Headi (Headache Diary) is a privacy-friendly app to log your headaches
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
H
Heading Calculator

Flight navigation aid
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Headphone detector for Vanilla Music

Launch Vanilla when a headset is plugged in
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Headphone indicator

Shows a notification icon in the status bar when headphones are plugged in
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Headwind MDM Agent

Mobile Device Management (MDM) System for Android (mobile agent - launcher)
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Health Connect Shortcut

A shortcut to the Android Health Connect.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Health Disconnect

View your Health Connect data in charts and widgets. Offline. Private. No ads.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore