The log of the orientation sensor is displayed in the graph.
API Reference( http://goo.gl/EWA3c )
Top graph is azimuth.
Middle graph is pitch.
Bottom graph is roll.
3 is for OS 1.5.
This application icon is Japanese Yajirobee.
Another Graph is replace Accelerometer Sensor and Magnetic Field Sensor.
More Infos :
Google Group :