Look, first of all I have to mention it is a fun game. Also to remove ads just turn on airplane mode. Now to the main part, I have put the amount I want and it takes me forever to get. At first it starts off at around 1000 gems or whatever each level and now at the point I am at it is 0.05 per. Its a fun game but takes a while to progress. I am currently at level 187 and have 29997.51 gems, will update when I reach the required amount. 2/5 (so far).