FOSS apps: free and open source

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

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Shikaku

A minimalist block logic puzzle game
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ShikiApp

Unofficial Shikimori mobile app
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Shiori

Android client for the Shiori Bookmark Manager
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
Ship Captain and Crew

Play a classic dice game for up to 4 players
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
ShizuCallRecorder

Empowers ADB through Shizuku to record phone calls on non-rooted device!
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
ShizuStore

App store for Shizuku apps that installs APKs from their upstream sources.
- System & tools
- FOSS
- Free
- No ads
- Android only
F-Droid GitHub Zapstore
ShizuWall

Lightweight no root, no vpn firewall solution powered by Shizuku
- Security & privacy
- FOSS
- Free
- Paid
- No ads
- No tracking
- Android only
Google Play F-Droid GitHub Zapstore
ShockAlarm

Full featured Cross Platform OpenShock Client optimized for Mobile usage
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Shop With Mom

Create price and unit comparisons and create a shopping list.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Shopping List

Shopping list and weekly planner with local sync
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Shopping List

Manage (grocery) lists
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Shopping List (Privacy Friendly)

(SECUSO) Create shopping lists and manage them privacy friendly
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Shopping List Calculator

Plan your grocery trips, add up costs, and keep track of your budget.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Shopping List for Nextcloud

A fast, offline-friendly shopping list that syncs with your Nextcloud server.
- Productivity
- FOSS
- Free
- Paid
- No ads
- No tracking
- Android only
Google Play F-Droid Zapstore
ShoppingList

A Shopping List with reminders, price tracking and list sharing.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ShoppingList

a simple shopping list application
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Shopt

A simple shopping list app with shop grouping and item ordering.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Shorty
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Shosetsu

The extendable novel reader for Android.
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Shots Studio

AI powered screenshots manager and organizer
- Multimedia
- FOSS
- Free
- No ads
- Android only
F-Droid Zapstore
S
Show Articles in Map

Show articles from Wikipedia near a given location in an interactive map.
- Navigation
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
ShowCase

Explore and organize your personal collection of movies and shows
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ShutApp

Manage multiple computers on your local network remotely with this Android app.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
SicMu Neo

Simple, full-featured, file-based music player
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
SicMu Player

Folder based music player. Shows and follows folder hierarchy.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
SideDeck

Free DJ app. Mix on your phone. No subscriptions.
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Sideload Helper by Rebble

Sideload to the Official Pebble App with an app from Rebble
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Sidestep

Intercept URLs, remove tracking, and redirect to privacy-friendly frontends.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Siete y media

Classic game of the Spanish deck 'Half past seven'
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Sift

A minimalist recipe keeper.
- Productivity
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Signal Generator

Audio Signal Generator
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
SignalSense – Network Switch Alerts

Know the instant your network switches between 5G, 4G, 3G, or 2G
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Signet

Verify calls from family, colleagues, sources against deepfake impersonation.
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Silence

Block unknown callers
- Communication
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
SilverDict

Android client of the SilverDict dictionary server
- Education
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
SimbaDroid

A simple SMB file server (needs root)
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Simlar - secure calls

Protect your privacy with encrypted phone calls.
- Communication
- FOSS
- Free
- No ads
- Android only
Google Play Aurora Store F-Droid Zapstore
Simon Tatham's Puzzles

40 single-player logic games
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Simpill

Easily set reminders for your medications.
- Health & fitness
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Simple Accounting

Manage your money easily
- Finance
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Simple Alarm Clock

Improved alarm clock
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid
Simple Audio Converter

A simple audio converter app for Android
- Multimedia
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Simple Chess Clock

Two touchable chess timers
- Games
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Simple Cleanup

Clean unneeded files with one click
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Simple Clipboard Editor

View, edit or delete the phone clipboard's text with a simple and fast editor.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Simple Counter

Keep track of things
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Simple Crypto Widget

A simple widget to display prices for lots of cryptocurrencies.
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Simple Decred Widget

Widget for viewing Decred exchange rate
- Internet
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid