Don't waste your $...you do all the work. – App Usage Tracker- Apps Time Review

You're basically paying $2 to have to manually check (and screenshot...which I couldn't even get to work) your app usage once a day. I'm sure it provides *some* additional info, but you might as well just set a reminder to check your battery use every day. For the price I expected automation.
Review by TheReal GiFreak on App Usage Tracker- Apps Time.