Logging your trip is absolutely easy. Just start the app and select "Quickstart".
If you would like to set up some logging parameters: it's totaly simply done.
GPSLogbook even logs your waypoints when flight mode is enabled.
Have a look at your archived tours as well and export, rename, or delete them.
Have a nice map view of your archived tours or have a look at the currently running tour.
Tap on any waypoint to gather more information like distance, altitude, or speed. Or just enter a note.
Via iTunes or mail: Choose whatever export format you like.
Decide what type of information you want to include in the export file and tap on "Start export". Easy as 1-2-3.
Nice: Open KML and KMZ files with Google Maps on your desktop PC.