Looking for a way to collect resource usage (processor, at least) on unrooted OS for running apps over time. This last part is crucial, since there are numerous apps presenting current usage for running applications, but i’m yet to find one which can generate statistics, collected by running in the background, for used apps over a period of time. Basically my question is a duplicate of this one, but it was last active in 2012 and also never really got an answer for realtime statistics collection.