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I want to have a very simple iPhone app to understand whether an amperage that iPhone receives while charging from different sources is different (computer, car...).
The app should have one simple screen with changing number if the ampreage is changing during a charge. The number not neccesery should be an amperage itself (as it might be difficult to measure). For example, number 1000 can be chosen as a default amperage from computer USB, 0 - from another source. Everything else will be somewhere else based on this scale