FOSS apps: free and open source

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

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World Scribe

Help story writers with fictional world-building
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub
World Weather

View weather forecast
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub
WorldMap

Display a world map
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Worm 🐍

Worm is worm, 🐍 wrom 🐍🪱
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Wormhole

Send and receive files using the Magic Wormhole protocol
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Wormhole File Transfer

A simple end-to-end file transfer app.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Wortmühle

Daily German word puzzle — 9 letters, one pangram, fully offline
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
WPGen

Wallpaper generator
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
WR Battle Sim

Battle Simulator for WAR ROOM®
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Wristotle Companion

Voice control for Pebble watches — on-device by default, no account.
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Wrong PIN Shutdown

Shutdown device on wrong PIN
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Wuxia Learn - Learn Chinese

App to learn Chinese
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
wX

Weather app geared towards storm chasers, meteorologists and weather enthusiasts
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Wyoming Android TTS

Use your Android's TTS engines in Home Assistant via the Wyoming protocol.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
XCSoar

Tactical glide computer and maps
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
XDYou

Free and Open Source data assistant for XDU students.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Xed-Editor

Advanced Text Editor for Android
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Xenia

Browse Gemini sites using a normal web browser
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Xeonjia: Ice Adventures

Save the world by solving ice puzzles and defeating enemies!
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Xia Express

Create interactive images by croping zoomable details
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Xime IME

A Rime-based Chinese IME for Wubi and Pinyin input
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
XiVPN

Proxy client based on XRAY
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
xlog2

Peer-to-peer amateur-radio field logbook that syncs with the xlog2 desktop
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Xmp Mod Player

Tracker module player
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
XMPP Admin

The mobile helper for XMPP server admins
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
XMRPod

Podcast player with Monero tipping support.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
xnotes

Handwriting notes and sketching app with stylus support
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Xournal++
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Xournal++ viewer

This app is capable of opening and displaying .xopp files on Android.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
XOverrideHeadphoneJackDetection

Manually override the headphone jack detection
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
XPENC

Offline expense tracker — accounts, budgets, dues and insights, all on-device
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Xray

Xray GUI Client For Android
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
XrayFA

XrayFA is a fast, secure, and user-friendly Android client for Xray-core.
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
XRCB
- Multimedia
- FOSS
- Free
- No ads
- Android only
F-Droid Zapstore
XScreenSaver

Standard screen saver collection shipped on most Linux and Unix systems
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Xtra

Third-party Twitch client
- Internet
- FOSS
- Free
- No ads
- Android only
F-Droid GitHub Zapstore
xvii messenger for vk

simple and handy messenger for vk social network but with extra features
- Internet
- FOSS
- Free
- No ads
- Android only
Google Play Aurora Store F-Droid GitHub
YA Habit Tracker

YA Habit Tracker is a Modern Habit Tracker
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
YAACC

UPNP/DLNA client and server
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
YacGuide

Yet Another Climbing Guide
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
YacGuide Dev

Yet Another Climbing Guide - Development Version
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
yadaw

A multiplatform sfx creator with no plugin GUI
- Multimedia
- FOSS
- Free
- Paid
- No ads
- No tracking
- Android only
Google Play F-Droid GitHub Zapstore
Yagni Launcher

Stock Android Launcher From Scratch
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Yahora

One tap records that something happened. There is nothing else to fill in
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
YAM

Simplistic metronome app by an amateur musician
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
YAM Launcher

YAM Launcher is a minimalist text-based launcher for Android with weather!
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid Zapstore
YAPL — Yet Another Pilot Log

Private, offline flight logbook with EASA/BCAA paper-logbook PDF export.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
YARC

YARC - Multi rate converter services
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid