Just a small post that we have released an update of GPSSerial which should fix some issues found on certain AppStore software and especially those issues which were stopping updating the GPS position and then making GPSSerial to crash. So now everything should work a lot smoother and your battery should not be drained anymore by GPSSerial when it is not used. We are aware that there is still a bug with the speedometer (which, sometimes, show 0 for the speed), especially with xGPS. We are working on this. In the mean time you can run your Cydia or Icy to fetch the latest GPSSerial number 1.1.
Oh and by the way, don’t buy any costly GPS softwares that you can found now on the AppStore. The next gen. xGPS will certainly be better and even cheaper. More information about that soon.
Thanks a lot for your support.