Please recommend an Android app that correctly indicates battery wear.
What is battery wear? After a Lithium-Ion (Li-Ion) battery has been repeatedly discharged and recharged, it will no longer hold it's full capacity.
For example, a battery, when new, might hold 3500mAh of energy. After it has been discharged and recharged 100 times, it might only hold 3200mAh of energy. I'm looking for an app that can correctly determine that second value.
A gratis, open-source, ad-free app is preferred, but none of those preferences are requirements.