o3

O3 Platforms Limited

In-app purchases

About this app

O3 creates environments that bring out the best in people.

Unlock our 24/7 study cafés or study anywhere with friends using our social study timer. Stay focused, catch Oysters, and earn rewards like lifetime O3 café discounts.

Android AccessibilityService usage disclaimer (optional): O3’s optional Focus Protection uses the AccessibilityService API during user-started study sessions to detect which app is visible. If you open a distracting app, O3 returns you to your device’s Home screen and shows a focus warning. App identifiers are processed on-device; O3 does not read, store, or share screen content. You can disable access anytime in Android Settings.

The world is your oyster. You’ve got this!

What’s new

Study to collect oysters

Invite friends to study

Get superpowered oysters

Explore our study cafes