FOSS apps: free and open source

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

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Table Mesh

Board games around a real table — phones play together over Bluetooth, no internet, no host, no sign-up.
- Games
- FOSS
- Free
- Nostr
- Android only
Zapstore
Tally

Private offline journey log and country presence-day counter.
- Productivity
- FOSS
- Free
- Android only
Zapstore
Teleprompter

A mobile teleprompter app to manage and play your video scripts while recording.
- Multimedia
- FOSS
- Free
- Android only
Zapstore GitHub
tendrl

Read, write and navigate knowledge on Nostr.
- Education
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Tenna

An nsite browser. A home screen for the apps that live on Nostr.
- Internet
- FOSS
- Free
- Nostr
- Android only
Zapstore
The Habit

Track app usage and sync to Nostr.
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore
Time Sheet

Alarm-driven timesheet and job hour tracker
- Productivity
- FOSS
- Free
- Android only
Zapstore GitHub
topaz

simple nostr relay for android
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
T
Trakstr Client

Trakstr Client for Android
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore
TravelTelly

Travel the world. Share your story. Own your data.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore
TravelTelly

Travel the world. Share your story. Own your data.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore
Treasures

Decentralized geocaching on Nostr
- Navigation
- FOSS
- Free
- Nostr
- Android only
Zapstore
Trustroots

Meet travellers and find hosts in the Trustroots community
- System & tools
- FOSS
- Free
- Android only
Zapstore
TWENTY ONE Companion

Meetups, events, courses and group chat of the Bitcoin community
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Unfiltered

A photo-sharing social app built on the Nostr protocol for Android.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
U
UnstableKraft

Podcasting 2.0 music aggregator with live streams, private feeds and collaborative playlists
- Multimedia
- FOSS
- Free
- Nostr
- Android only
Zapstore
UsernameGenerator

Memorable usernames in 11 languages, generated on your device
- Android only
Zapstore GitHub
UTX Wallet

Self-custodial Bitcoin wallet with personal node and full UTXO control
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
UtxoPocket

Privacy-first Android watch-only wallet for Bitcoin descriptors and UTXO inspection.
- Finance
- FOSS
- Free
- Android only
Zapstore
Vector

A decentralized, privacy-focused community messenger with zero metadata leakage
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
veelog

A simple nostr vlogging application for short clips
- Multimedia
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Veksli

Bitcoin SK ATM codes exchange app
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
Vexl

Vexl is a mobile app giving its users a simple, accessible and safe way to trade bitcoin as it was intended - peer-to-peer and without KYC.
- Finance
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
Voca

If you can read it, Voca can say it.
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore Google Play Aurora Store
Voyager

Automotive dashboard for Android built on Roadstr — navigation, music, podcasts, weather, voice and phone in one screen.
- Navigation
- FOSS
- Free
- Android only
Zapstore GitHub
WalletScrutiny

Help check whether Bitcoin wallets are reproducible from sources
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore
Warden

Browser router — choose which browser opens your links
- Internet
- FOSS
- Free
- Android only
Zapstore
WaveFunc

Internet Radio on nostr
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
waves

A Nostr-enabled Flutter photo sharing application
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore
Week Calendar

A calendar app showing the week view
- Calendar
- FOSS
- Free
- Android only
Zapstore GitHub
WhiSPa

Bitcoin Silent Payments wallet
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
WhiSPa (Signet)

Bitcoin Silent Payments wallet — Signet test build
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
Whistle

Decentralized group location sharing over Nostr + MLS
- Security & privacy
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
WildBit

WildBit is an offline-first hiking and navigation app that turns real-world maps into a 64-bit pixel-art adventure, combining GPS tracking,…
- Navigation
- FOSS
- Free
- Android only
Zapstore GitHub
Wisp

The Client that Just Works
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore Google Play Aurora Store GitHub
Wordsoul

Hand a totem to someone. Speak the word. Trace the mark.
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore
Write Nostr

A long-form writing and publishing app for Nostr
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
XBT Widget

Live XBT (Bitcoin-BLAKE2b / BIP110) price on your Android home screen
- Finance
- FOSS
- Free
- Android only
Zapstore GitHub
XChat

Secure messaging with end-to-end encryption. Connect with friends and family through private, encrypted chats.
- Android only
Zapstore Google Play Aurora Store GitHub
XM Arcade

Shorts, mini apps, music, Concord chats with zaps and xaps
- Multimedia
- FOSS
- Free
- Nostr
- Android only
Zapstore
YakiHonne

YakiHonne is a decentralised social payment client on Nostr & Bitcoin.
- Finance
- FOSS
- Free
- In-app purchases
- Nostr
- Android only
Zapstore Google Play Aurora Store GitHub
Yana

Yet Another Nostr Application
- System & tools
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Yana Wallet

NWC wallet
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Zaint

Zaint is a free Android image editor for drawing, retouching, and creative photo editing.
- Multimedia
- FOSS
- Free
- Android only
Zapstore GitHub
Zap Cooking

Cook, share, plan meals, and zap recipes on Nostr
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore Google Play Aurora Store
Zap Tracker

Lightning-powered dashboard for Nostr and more!
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore
zap.stream

Live streaming on nostr
- Multimedia
- FOSS
- Free
- Nostr
- Android only
Zapstore Google Play Aurora Store GitHub
zapbook

Read together. Share progress. Get sats
- Education
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub