Twitch Crowdsourcing

Building a map of human activity in the world, one phone unlock at a time.

Install Twitch for Android »

Stanford research

Help us help science. Twitch Crowdsourcing is our approach to coordinating millions of micro-contributions in spare seconds. We need your help to demonstrate that it's possible.

The Android app is now open source! Check out or fork the code on our Github page.

Unlock your phone, tell us about your world

Each time you use your phone, answer a roughly one-second question about your surroundings. How many people are nearby? Are those people energetic or lethargic?

Available for Android

To join the team, download our Android app and use it to replace your phone's default lock screen. Twitch will appear after your security unlock if you have one.

Android app on Google Play

We are grateful for support from Google Research and HTC.