Please look at a developer web site about the details.
It supports Android 2.2 (Froyo) and or later. It needs network connection. It uses an acceleration sensor and Magnetic filed sensor.
This application is equipped with GPS Logger, and the recording function and compass function of positional information. It can record the positional information on external storage or an internal memory in GPX format at a file. It is convertible for a KML file format.
Your setting may be lost if this application is updated. And if you uninstall this application, you had better copy a GPX file to somewhere else.
The software does not transmit your personal information freely.
Please use it for traveling, hiking, trekking, sailing, hang gliding and so on.