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1,550+ free, open-source Android apps, and growing.
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OpenScan
A document scanner that keeps your papers private
OpenSCQ30
Control Soundcore headphones without their app
OpenStop
Answer simple questions to map how accessible public transport stops are
OpenTagViewer
See your AirTags on an Android phone
OpenToday
Plan your day and never forget a reminder again
Operit AI
An AI helper that can actually use your phone
Oppia
Free, friendly lessons that work even without internet
Organic Maps
Offline maps that respect your privacy
Orgro
Read and edit your Org Mode notes and to-do files on your phone
Orgzly
Organize your notes and to-do lists with a simple outliner
Origo Reader
An elegant ebook reader for EPUB, PDF, and text files
OsmAnd
Super-detailed offline maps for adventurers
OSMfocus Reborn
Point at any building or road to see its OpenStreetMap tags
OsmGo
Add places to the open map as you walk past
Osmin
GPS navigation for roads and trails, powered by OpenStreetMap
OSMTracker
Record a GPS track with notes, photos and voice memos
OSS Document Scanner
Scan documents and read the text on them
OSS Weather
A clean forecast app for phones and watches
OtakuWorld
Three readers and watchers sharing one design
OTP Helper
Copies verification codes out of notifications
OuterTune
Plays your own music files and YouTube Music
Outline
Reach the open internet with a key to your own VPN server
Overlay Translator
Translate on-screen text instantly, right over the page
OvertChat
Chat with AI models on your own server