My take on the MobileTracker software is that it is half baked and free software accomplishes the same thing for no cost. Here are some of my issues with the Pearl:

Does not always start GPS when I hit start tracking
Stops tracking if you get into a tunnel with no warning that it has stopped
No display that it is actually working unless you enable the annoying feature to tell you when it has captured xxx tracks
No ability to change where the file will be stored
No distance is captured
No speed is captured

They need to do some work on this app before people really find it useful, it is as flaky as SPOT at this point and if SPOT is any indication of their speed at updating the software is any indication don't expect any new features any time soon.

Good luck to all.

SIB