Thank you for sharing, have you tried Harry's Lap Timer or Racechrono with it? (if not internal GPS, there are BT GPS units which work well).
If it's not too much trouble, can you please do a bench test as can be found at the following URL?
https://play.google.com/store/apps/d...labs.geekbench
Would be useful to compare it to the suggested minimums for the apps.
http://browser.primatelabs.com/android-benchmarks
-Ryan.