The application is still in flux so documentation may not be up to date.
There are a total of five Tabs on the app.
1.Progress - Intended to track GPS readings
2.Measure - Originally intended to average out all GPS readings while the device was in a static position.
3.About - Details sensors found on the device and allows them to be switched on or off
4.Map - Show the last location on Google maps
5.Test - A scratch page for test info.