indeed still laggy ....they should rollback to the version without ingame ads
Also, my phone said that IdleMiners app is using 99% of my phone CPU...

i think they use it like "The St. Bernard Lake" on mybitmine ...app uses your cpu to mine crypto stuff
If it did, that would be stupid, as even with all (smart)phones of the world you wouldnt be able to mine even a single bitcoin in less than over 10k years, from what a study found out.
According to MyBitMine (Michael the admin) not even cpu-mining via browser (the said St. Bernard Lake feature of MBM), yields anything to compensate the expenses given with 18 satoshis per hour. You can see this for yourself by going to minergate and trying web-mining there (needs an account to accumulate any crypto coins), its the same as the api used on MyBitMine.
There ya go:
https://minergate.com/a/465d75bf3d4625dd