User blog comment:Bfplayer001/HELP FOR CRASHING ON ASUS ZENFONE 5/@comment-70.1.183.59-20150903193909

My phone often has the same problem. The app just crashes when I go into battle. I think it has to do with phone processing or memory but I can't give you a clear answer on that. All I can say is turn graphics options to low, turn off BB effects and background effects, and reduce the amount of items shown on screen. This can all be found in settings

Hopefully that'll help, but I personally still get crashes every now and then.