From what I've seen on reddit, it was removed from the iOS build because iPhones don't use AMOLED screens, meaning that making the screen blacked out doesn't really save any power. It also had some bug-out issues. It's still in the android version because a lot of android phones use AMOLED, meaning that just blacking the screen reduces power consumption, making it actually work as expected.COMaestro said:What did they do to the battery saver? I still have a battery save option in the settings, my screen still dims when I turn it upside down and it tracks my movement just fine (or at least as well as it ever does).Saltyk said:I just want the battery saver option back. It was apparently removed as well. Why? I tended to keep it on in my pocket at work so I could hatch eggs, but not the game likes to do stuff in my pocket (nothing too bad, but it might click on a nearby Pokemon or open the menu) and it kills my battery even faster. Without battery saver, it basically makes egg hatching way more difficult for me.
For the record, I could easily hatch 2-3 2 Kilometer eggs or a five kilometer egg each day at work.