The eB2 Sensor Logger is an application developed in order to record activity information from an Android Phone. This application records information from the inertial sensors and uploads it anonymously to a server for processing.
If you want to collaborate with the AID project you just need to download the eB2 Sensor Logger from the Google Play Store and install it in your smartphone. Next enter a username to register on the server and scan the QR code that will appear under the submit bottom as the application tells you. Once the application lets you start it will record the needed information in background and upload it to the AID servers.