I installed iOS 9 B1 without UDID registration. The battery life is somehow a bit better then ios 8.3.
But the widespread reports say otherwise. Kinda baffled. Any comments?
Re: Suggest me best app to clean cache of my iphone 6 (16gb)
The best way is to hard reset. It will do the trick.
Hold Home Button and Power Button at the same time until the screen goes black and the Apple logo comes up again.