Very useful!

This is in my opinion one of the best app for GPS tracking available in the store.
Great to track your family members, if you have sons who drive a car you can also check if they drive too fast :)
Historical data views are very useful for post analysis, as well as the panic button to alert who you want to be alerted in the unlikely case you should need some help.

Dancin_ about GPS Tracker and Locator Chirp, v2.0.1