← All apps

System & tool apps

Launchers, keyboards, file managers and utilities.

page 20

R
RPN

Very easy to use RPN Calculator
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
RPNcalc

A simple, modern calculator that uses RPN (Reverse Polish Notation).
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Rtl-sdr driver

Port of rtl-sdr's rtl_tcp
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Rufid

Write and recover bootable USB media
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Rumble

Off-the-grid micro-blogging application for communities
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Running Services Monitor

Monitor running services on your Android device with Root or Shizuku
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
ruNNNpe bridge

Automatic bridge from NPE RUNN to Health Connect.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Russian for AnySoftKeyboard

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

An open-source remote desktop application, the TeamViewer alternative
- System & tools
- FOSS
- Free
- No ads
- Android only
F-Droid GitHub Zapstore
Rusyn for AnySoftKeyboard

AnySoftKeyboard Rusyn Language pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Rview

Gerrit code review client
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
SAI

SAI lets you install and export split APKs
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
Sapio

Android apps that respect you!
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Sardinian for AnySoftKeyboard

Sardinian language pack for AnySoftKeyboard
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
SavaPage Print Service

A Print Service for SavaPage Open Print Portal
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Save Locally

Using an app that doesn't allow Saving but allows Sharing? No problem!
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Save on Device

Save shareable data to your device
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
SaveAsTxt

Very small tool to save as txt from share menu of other applications
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
SaverTuner

Extension to the built-in Android Battery Saver
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Sayboard

An open-source on-device voice IME (keyboard) for Android using the Vosk library
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ScanBridge
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Schulrechner

The calculator you know from school
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Scrambled Exif

Remove the metadata from your pictures before sharing them
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid Zapstore
Scratchpad Launcher

A minimal launcher with an always-visible scratchpad. Zero ads.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
scrcpy

Mirror a second Android device over wireless ADB. No root required.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Screen Off Timer

Clean sleep timer to stop media and lock screen.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Screen Time

Easily track the time you spend on your device and apps.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Scrunch

Play sounds whenever you fold or unfold your Galaxy Z Fold.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
SD Maid 2/SE - System Cleaner

A trusted assistant for your Android, to keep it clean and tidy.
- System & tools
- FOSS
- Free
- In-app purchases
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid IzzyOnDroid GitHub Zapstore
SDK Monitor

Display and monitor the targetSDK from installed apps
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
SDRemount

remounts the SD Card to allow write access
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid
Search to browser

Forward GLOBAL_SEARCH intents to your default browser
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
SearchLauncher

Search apps, contacts and the web, and open results in an ad-free browser
- System & tools
- FOSS
- Free
- No ads
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
SecondsClock

Clock with seconds as widget or fullscreen
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
SecScanQR

The QR code scanner/generator that cares about your privacy
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
SecureOTP - Universal OTP Extractor

Auto-detect and copy OTP codes from SMS, Email, and app notifications
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Senior Launcher

Launcher reduced to the essential, intended for elderly people
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Sensa Gram

Stream Android sensor data over UDP with minimal latency.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Sensor Server

Stream phone's sensors to websocket clients
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
Sensor Spot

Stream real-time Android sensor data over MQTT
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Sensors Sandbox

Probe available sensors
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid
Seqular

Seqular, A Social Network without Place or Nation.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid IzzyOnDroid GitHub Zapstore
Serbian for AnySoftKeyboard

AnySoftKeyboard Serbian Language pack
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
S
SerialPipe

A USB Serial to UDP bridge app
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub
SerialTest

A cross platform debugger for Bluetooth/TCP/UDP
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid GitHub Zapstore
ServeIt

A simple http-server on android using flutter.
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
F-Droid Zapstore
Shader Editor

Create and edit GLSL shaders
- System & tools
- FOSS
- Free
- No ads
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore
Shadowsocks

A shadowsocks client
- System & tools
- FOSS
- Free
- No tracking
- Android only
Google Play Aurora Store F-Droid GitHub Zapstore