FOSS apps: free and open source

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

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Moneytopia

Moneytopia is a fully functional personal expense tracker built with Jetpack Compose and Material 3.
- Finance
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
moStard

bash git clone https://github.com/roguehashrate/moStard.git cd moStard pnpm install pnpm run dev
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
Moviesy

A beautiful client for YTS website which also provides built-in torrent & subtitles downloader with Chromecast support.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
mpvEx

A beautiful media player for android, based on mpv-android and built with Jetpack Compose. Forked from mpvKt
- Multimedia
- FOSS
- Free
- Android only
Zapstore GitHub
MqttDroid

MqttDroid is an Android app that aims to provide MQTT support to Android's built-in device controls (Android 11+).
- System & tools
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
mucke

A music player that gets the best out of your local collection.
- Multimedia
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
Muezzin

Muezzin ======= Muezzin is an application for Islamic prayer times. It is a lightweight and easy to use application.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
Multi Launcher Nightly

Minimal Launcher app for Android. Customized olauncher as I just started learning kotlin .
- Education
- FOSS
- Free
- Android only
Zapstore GitHub
MusicBee Remote

Application for controlling MusicBee through your Android Device · · ·
- System & tools
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
My Diary

Well, not much to say, all this does that you can write your daily journal in it!
- System & tools
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
NClientV2

An unofficial NHentai Android Client. This app works for devices from API 14 (Android 4.0) and above. Releases:
- Internet
- FOSS
- Free
- Android only
Zapstore GitHub
Nearby Settings

Connect securely to nearby devices - Modify app settings right from your phone - Easily define a schema for nearby devices to edit app…
- System & tools
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
Nekogram

Nekogram is a third-party Telegram client with not many but useful modifications.
- Android only
Zapstore Google Play Aurora Store GitHub
NekoSMS

A pattern-based text message blocker for Android.
- Communication
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid
NetBird

Connect your devices into a single secure private WireGuard®-based mesh network with SSO/MFA and simple access controls.
- Communication
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
NeverTooManyBooks

~ @Copyright 2018-2026 HardBackNutter ~ @License GNU General Public License ~ ~ This file is part of NeverTooManyBooks.
- Education
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
Nex Notes

⚠️ Project Status: Archived > This project is no longer being actively developed or maintained.
- Productivity
- FOSS
- Free
- Android only
Zapstore GitHub
Nibras Reader 3

A web-based self-hosted open-source system for the long-term management of personal information.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
Night Screen

🌙 A nighttime eye care software. The software is developed using Jetpack Compose. Material Design 3 (You) style.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
Nightly

Multilingual: English, Italian, German, Russian, French, Spanish, Czech, Turkish, Romanian and more.
- Multimedia
- FOSS
- Free
- Android only
Zapstore GitHub
Nmail

Take back your inbox. Private, decentralized mail that you truly own.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
nocodb

A prototype Android/iOS client for NocoDB
- System & tools
- FOSS
- Free
- Android only
Zapstore
nostrcal

A decentralized calendar application built on the Nostr protocol.
- Calendar
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
Nostros
- Finance
- FOSS
- Free
- Nostr
- Android only
Zapstore IzzyOnDroid GitHub
Note Companion

This is an android aimed at students who cant take proper notes in school because most note-taking apps don't support equations etc.
- Education
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
NotesMaster

Notes app for android 📝📓
- Productivity
- FOSS
- Free
- Android only
Zapstore GitHub
NowiPass

https://github.com/cuadratico/NothingK
- Android only
Zapstore IzzyOnDroid GitHub
Nozzle

Nozzle is a lightweight nostr client for Android.
- Communication
- FOSS
- Free
- Nostr
- Android only
Zapstore GitHub
NPSReact

Created with React Native, featuring Material You design.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
Nullgram

中文日本語
- System & tools
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
Nunchuk

Nunchuk Android is a natively written multisig wallet powered by libnunchuk.
- Finance
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
nutstash

⚠️ NOTICE! Nutstash is currently unmaintained. For the time being, please consider using a different cashu wallet like https://cashu.me .
- Finance
- FOSS
- Free
- Android only
Zapstore
Oblivion

Unofficial warp client for android
- System & tools
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store GitHub
ObsidianTodoWidget

Android Widget to display an interactive todo list from a markdown file
- Productivity
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
OC Remote

Android client for OpenCode servers with a native UI and broad feature coverage.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
OCR (Ml Kit)

This app bundles OCR functionality that can be called from other apps via Intents.
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
OCS-NG Agent

OCS Inventory NG Android Agent Web site : https://ocsinventory-ng.org/
- Internet
- FOSS
- Free
- Android only
Zapstore GitHub
OctoPrint For Android

You don't have a Raspberry Pi, but you want to control your 3D printer remotely? Use your phone as an octoprint host!
- System & tools
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
OctoTC

Dedicated touch screen Octoprint UI for older Android phones / tablets
- System & tools
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
OdinTools

Collection of utilities for the AYN Odin 2
- System & tools
- FOSS
- Free
- Android only
Zapstore GitHub
oj_helper

一款帮助你查询各大oj信息的应用。
- System & tools
- FOSS
- Free
- Android only
Zapstore
Omni

Up-to-date Material 3 design - Lightweight, no spyware or bloat - Compass with latitude & longitude - Spirit Level - Ruler - Strength…
- System & tools
- FOSS
- Free
- Android only
Zapstore IzzyOnDroid GitHub
Open Note

[!IMPORTANT] > This project is no longer being maintained. Please switch to Kori.
- Education
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store IzzyOnDroid GitHub
OpenAthena™ for Android

OpenAthena allows common drones to spot precise geodetic locations
- Navigation
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store
OpenCloud

Build status:
- System & tools
- FOSS
- Free
- Android only
Zapstore
OpenCloud QA

Build status:
- System & tools
- FOSS
- Free
- Android only
Zapstore
OpenDTU

View and control your OpenDTU. Check how much energy your solar system is producing and see how it compares to the past.
- System & tools
- FOSS
- Free
- Android only
Zapstore Google Play Aurora Store IzzyOnDroid GitHub
OpenLynx
- Navigation
- FOSS
- Free
- Android only
Zapstore