For anyone who got crash problem.
1. I log in by use unsigned mod (emulator or other device that you have root access).
2. Apply in-app-purchase patch from lucky patch it's work !! go buy every buff and remove ad LOL
3. Clicking save to made it sync
4. Log in on your LEGIT game from playstore.
VOLAAA now your save now got maximum currency. And got all the buff that need real money and remove ad (BEST PART)
PS. English not my first language sorry if you don't understand.