App that doesn't overcharge?

I need an app that when I sleep, it doesn't charge after 100%.Is there an app like that for my iPhone?

There's no such thing as "overcharge" for Lithium Ion batteries in Iphones, Androids, Blackberries, Windows phones, Palms, and 96% of all phones on Earth (those that use a Lithium Ion battery)… OverCharge is a 20th Century Concept and no longer applies.

It should stop charging and start using the corded power.

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