FOSS apps: free and open source

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

page 88

UPI Expense Tracker

Offline UPI expense tracker: auto-captures payments, no cloud or tracking
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Urdu for AnySoftKeyboard

Urdu Language Pack for AnySoftKeyboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Urik Keyboard

Privacy-focused Android keyboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Url forwarder

Save bookmarks
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
URLCheck

Allows analyzing (or sharing) URLs before opening them.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
URLSanitizer

A simple tool to get rid of all those annoying tracking GET query from URLs.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Urn

Offline polls to decide and vote using Majority Judgment
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
URnetwork

Goodbye VPN!
- System & tools
- FOSS
- Free
- In-app purchases
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
URSA

Native Android client for Uptime Kuma with FOSS push, no Google services.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
US Travel Converter

Converts some imperial units to SI units for travel to the USA.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
usageDirect

Display screen time statistics
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Usagi

Open-source manga reader for Android
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
USB Descriptor Explorer

Inspect USB devices with full descriptor and HID details
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
USB Device Info

List USB Devices
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
U
USB Gadget Tool

Convert your Android phone to any USB device you like
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
UsbGps4Droid

USB GPS Provider for Android
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
User-controlled decryption operations

Emulates a smart card and lets you control the decryption operations
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
UserLAnd

Easiest way to run GNU/Linux Distros on Android - no root required
- System & tools
- FOSS
- Free
- In-app purchases
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub
UT.urn - YouTube facilitator for Podcini.A

A service app providing YouTube contents to Podcini.A
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
UUID 0xFD6F Scanner

Scan for BluetoothLE Beacons with UUID 0xFD6F
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
UVC Camera / Usb Camera custom

App for using a video camera over usb from userspace.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
UWR Planer

Match planning for underwater rugby – the UWR Planer app.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
V2compose

A Material You style V2ex client!
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
V2EX
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
V2ray Plugin

A SIP003 V2ray plugin
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Vadhod APK Extractor

Offline, privacy-first APK extractor with proper split-APK support.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Valencia Transit Reloaded

Transit info for the metropolitan area of Valencia and Alicante
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Valentin's PowerTools #002 - Passwords to remember

Generates human speakable and readable passwords
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valentin's PowerTools #003 - Gesture Drawing Pract

Displays pictures for a set time with optional timer - for drawing practice.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valentin's PowerTools #005 - Roll Some Dice

Minimalistic Android app for rolling 2 dice.
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Valentin's PowerTools #006 - Yes XOR No?

Assists you in your decisions!
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valentin's PowerTools #012 - Rate Your Pics

Rate your pictures very quickly.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valentin's PowerTools #016 - Tomato Potato Clock

Distraction-free pomodoro timer
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valentin's PowerTools #018 - Volume Percent Calcul

Calculate alcohol mass, content and volume in drinks.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valentin's PowerTools #023 - MemorizeYourClassics

Memorize poems, songs, etc. with this nice poem viewer.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Valet

The Bitcoin Lightning Wallet with Extra Features
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Valetudo Companion

Easily find and connect Valetudo robot vacuums on and to your network
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Valv

An encrypted gallery vault for Android devices
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
VanAccess BMS Monitor

Monitor LiFePO4 batteries and Victron devices over Bluetooth
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Vanilla

A cute and elegant calculator app for Android
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Vanilla Lyrics Search

Vanilla Music player Lyrics Search plugin
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Vanilla Metadata Fetch

Vanilla Music player Metadata retrieval plugin
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Vanilla Music

Listen to and manage songs
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Vanilla Tag Editor

Vanilla Music player Tag Editor plugin
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Vape Tools

Coil and e-liquid tools.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Varengold activeTAN

2FA for online banking
- Security & privacy
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Variometer

Inertial vertical speed indicator
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
VAT Calculator

Calculate VAT for any country in the world
- System & tools
- FOSS
- Free
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore