Tools
Handy helpers: 500+ apps, all free and open source.
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In testing
Round Sync
Sync your phone with almost any cloud storage
RTranslator
Talk to someone in another language, live
Rufid
Make a bootable USB stick straight from your phone
RunnerUp
Track your runs with the GPS in your phone
Running Services Monitor
See what is quietly running on your phone
RustDesk
Control your computer from your phone, from anywhere
SafeHaven Store
An alternative app store focused on open-source, malware-free apps
SambaLite
Browse and sync files on your Windows or NAS network share
Sapio
See which apps still work without Google services
SatDump
Pull pictures out of satellite radio signals
Sayboard
Voice typing that never leaves your phone
ScanBridge
Scan paper documents straight to your phone over Wi-Fi
Scanly
A quick, private document scanner
Scrcpy for Android
See and control another Android phone from your phone, by Wi-Fi or USB
Screen Stream
Show your phone screen in any web browser
Screenshot Tile
Take a screenshot from the quick settings
ScreenTrans
Read the words on your screen in your own language
SD Maid SE
Clear out the junk filling up your storage
SDR++
Listen to the radio spectrum with an SDR dongle
Seamless
Translate speech without an internet connection
Secure Dialer
Make calls and keep contacts without anything leaving your phone
Sefirah
Link your phone and your PC
SensorServer
Stream your phone's sensors to a computer
SensorSpot
Send your phone's sensors to a home server