
I want to show these other applications' Battery Usage percentage values from my own application. Can I do that?

I want to show these other applications' Battery Usage percentage values from my own application. Can I do that?
You can monitor the current battery percentage using UIDevice. https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIDevice_Class/index.html
Unfortunately there is no way to tell which applications are draining the battery.