FOSS apps: free and open source

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

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Blidraughts

Play draughts games over Bluetooth
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Blink Comparison

Simplifies comparing photos of tamper-evident seals using your eyes
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Blitz: Fischer Chess Clock

A minimalist Fischer chess clock for Android.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore Accrescent
BlitzMail

Share content and notes via email
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Blitzortung Lightning Monitor

Get an overview of the current thunderstorm situation
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Block Blast

A minimal, privacy-focused block puzzle game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Block Puzzle Stone Wars

Addicting classic game, completely free, with multi-player mode
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Block'Buster

Simple HTML5 arkanoid-type game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
BlockAds: Clean Internet

Block ads & trackers system-wide. Firewall, SafeSearch, profiles
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
BlockDrop: Block Puzzle

Free and open source block-stacking puzzle game. Arrange falling shapes to clear
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Blocker

A component controller for Android applications
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Blockstream App (Green)

Bitcoin - secure and easy
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
B
Blokish

Board game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Blood pressure monitor

Save, analyze and export your blood pressure!
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Blorp

A Threadiverse client for Lemmy and PieFed
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
BlowTorch 2

BlowTorch 2 — a versatile mobile MUD client
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Blue Line Console

Keyboard based launcher
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Blue Line Solar Info

Sun & moon information
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Blue Square Speedometer

Simple speedometer & GPS viewer
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Bluecheese

Offline text encryption-fast, local, no trackers.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
BlueGate

Android client to control bluegate BLE gate controller
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Bluemoon

Open source, privacy friendly menstruation tracking app. Your period, your data!
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
BluePass

BluePass extracts 2FA tokens from SMS and forwards them via Bluetooth
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
BlueSound Controller

Control BluOS and Sonos multi-room audio players on your network
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Bluetooth LE Spam

Impersonate Bluetooth Low Energy devices, causing pop-ups on receiving devices.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Bluetooth QR & Barcode to PC

Enables sending QR/Barcodes to a Bluetooth Device (e.g PC) without any Software
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Bluetooth Remote

Bluetooth remote control for Android TV.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Bluetooth Remote

Open-source universal serverless Bluetooth HID remote control for Android.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Bluke

Use your phone as a Bluetooth mechanical keyboard, gamepad, and trackpad
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
B
Blurred Lines

Live wallpaper
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
BMI Calculator

Simple BMI calculator
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
BMI Calculator

Body Mass Index calculator
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
BmiCalc

BmiCalc is a software to calculate the body mass index (BMI).
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Boardgame Clock (Privacy Friendly)

(SECUSO) Boardgame Clock offers timers for boardgame time tracking
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Boardgame Pal

Dice, score counter, starting-player draw & more – 100% free and ad-free!
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
BoatSpeedy

GPS speedometer and waterway navigation for boats, with battery analytics
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
BoB

Baby on Board is an application of pregnancy tracking that respect your privacy
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
B
BobBall

Jezzball style clone
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
B
Bodhi Timer

Elegant Meditation Timer
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
BodyCheck

Scan and visualize body composition QR codes from your gym
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Boilr

Pricealarm for Bitcoin, altcoins, assets & futures
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
BOINC

Use your device to advance scientific research.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Boky Fivavahana Anglikana

Madagascar's Anglican common prayer book app
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Bold Bitcoin Wallet

Seedless, secure Bitcoin wallet using Threshold Signatures.
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
BoltOn

An open-source bluetooth file manager for the Wahoo ELEMNT Bolt.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
B
BombusMod

Messaging client
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
B
Bondwidth

Private, offline phone & contacts app that helps you keep up your bonds
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
BonjourBrowser

Browse Bonjour services for http
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore