My Tracks is probably one of the most underappreciated mobile apps from Google.
The app lets you record your movements along with tons of additional data. You can watch it later on Google Maps or Google Earth.
The second version is out now and features a brand new user interface optimized for Android 4.
Google highlighted the major updates:
The ability to play back your tour directly on Google Earth for Android
Aggregation of statistics over time to show trends in your performance
Simpler, faster user interface
Improved charts and stats tables that are easier to read