FOSS apps: free and open source

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

page 31

Firefly III Shortcuts

Application simplifies transactions of FireflyIII
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
FirTube

FirTube — simple webView browser for YouTube
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Fish Rings Puzzle

Fish Rings Puzzle game developed by Velbazhd Software LLC (c) 2005-2026
- Games
- FOSS
- Free
- No tracking
- Android only
F-Droid Zapstore
FiSSH

SSH authentication via Fingerprint scanning over network (TLS Sockets)
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
F
Fit Notifications

Enable all notifications for compatible Fitbit devices
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
FitBook

Track your calorie intake - Completely offline!
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
FitBuddy

AI calorie & workout tracker with region-aware diets — log by photo or text
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
FitForge

Offline fitness & nutrition tracker with optional AI coaching
- Android only
Google Play Aurora Store F-Droid Zapstore
Fitness Calendar

A private and offline by default activity tracker.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
FitoTrack

A privacy oriented fitness tracker
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
fivethreeone_log

Track your workouts and progress with the 5/3/1 method.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
FixupXer - URL Enhancer

Clean tracking, choose link frontends, and spot sensitive data in URLs
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
flabr

client for habr.com
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Flac-R

Perfect your collection.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Flang

A board game similar to chess
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Flare

Browse Mastodon, Bluesky, X, Misskey, Nostr and RSS all in one app.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
FLARE

An action RPG with gameplay alike to the games in the Diablo series
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
F
Flare Enough

Calm, private, offline tracking for medication, symptoms and stillness.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Flash Alert (Calls & SMS)

Blink the terminal when receiving a call, SMS or an application notification
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Flash Deck

A simple and easy to use flash card to help you study
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Flashbyte

A fast cross-platform file sharing app.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
F
FlashCards

Make cards with csv files as input to memorize things
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
FlashDim - Dim your flashlight

Modern flashlight app with dim functionality on Android 13+
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore Accrescent
Flashlight Tiramisu

An application that allows you to smoothly adjust the brightness of the flashlig
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Flashy

Simple and Privacy-Friendly Flashlight App
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Flashy Alarm

Turn on flashlight/torch when alarm goes off.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
F
Flask

A cute app to buy items from the Computer Science House vending machines!
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Flauth

Privacy-first, open-source TOTP authenticator for 2FA token management.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Flexify: Gym Workout Log

Log workouts, reps, cardio, and rest timers. Track strength offline.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
FlickBoard

The Predictable Keyboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid Zapstore
Flicky

Unofficial Fdroid client (for Android TV)
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Flicky Bee

Flick and Bumble your way through the flowers.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Flindex

Flindex is an inventory management app. Find your stuff (again).
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Flip 2 DND

Toggle Do Not Disturb mode by flipping your phone face down
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Flip a coin

Game to help you to choose between two options!!.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Flipper Mobile App

Organize data and keys on your Flipper Zero device
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
FloatDeck

3D parallax live wallpaper with gyroscope sensor support
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Floating Mute

Quickly mute and unmute your device.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Floating Volume

Control your Android device’s volume with a slider, accessible from any app.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
floccus bookmark sync

Sync your bookmarks privately across browsers and devices
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
FloFla Cards

FloFla Cards – Passive learning with your phone! 🎓📱
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Florae

Keep care of your green, leafy best friends.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
FlorisBoard

An open-source keyboard which respects your privacy. Currently in beta.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Flowit — Block Puzzle

Fill all boxes with the color of their border
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Fluffy

A TV friendly file manager and archive viewer
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Fluffyboard

Open source Flutter Whiteboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
FluffyChat Matrix Messenger

The open-source, non-profit European alternative to big tech’s messaging and vid
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Flutter McSweepy

A simple Minesweeper clone
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore