No it doesn't! In fact it could be as rewarding as seeing those bar graphs that do track my physical activity – only inverted.
I'm not sure if that would be possible on iOS. But they do already report app usage and allow you to set timers on your own usage to make sure you aren't spending more than your allowance. "Screen Time": https://support.apple.com/en-us/HT208982
I'm not sure if that would be possible on iOS. But they do already report app usage and allow you to set timers on your own usage to make sure you aren't spending more than your allowance. "Screen Time": https://support.apple.com/en-us/HT208982