I play on an iPhone 6s; it's a couple years old and I'm sure the battery isn't what it once was. Even so, no other apps deplete my battery as fast as ABE does! In the last 24 hours it has been responsible for 67% of my battery drain; in the past week 54%. If my phone is not charging, while playing ABE my battery goes down about 1% every minute. Normally if I leave my phone plugged in while playing, it charges up slowly - in other words the charger beats out the ABE drain. But today (right now still in fact) I am in a conference call that has been going on for a couple hours and I have also been playing ABE; the whole time my phone has been plugged in and charging. All of a sudden I received the dreaded "battery at 20% message." In other words, while using the phone as a phone and playing ABE at the same time, the battery drain is depleting the battery faster than the charger is charging it!