I know how to hack gems and coins in this game. But will use a little of penny. U must buy. but before buy u must change the value to whatever values it is.
First memory range choose anonymous. Go to the gems section. Buy the CHEAPEST one yaa. Select DWORD. N then search 30;80;170 At shop. Keep searching until the result under the 200. N then go to more . Change increment all the value to 1. It will change the value. N then u find the value that has change at gems section. N then u change it to what value u want. N then there you go. Buy it. You got that gems for sure.