hi guys. you may have missed this if you're looking for a hack for droid.
it hacks the counters for coin/gem/social so you will earn them instead of spending.
If you want to keep your prevous save, you must have a rooted phone, and make a backup of the following:
/data/data/com.gameloft.android.ANMP.GloftPOHM/files/mlp_save.dat (and maybe backupsavefile.dat)
(using ti backup may also work)
if you like the game please support the developers.
good luck.