If there will be an integrated stopwatch right inside the app which will be automatic- will start when the app will open & will stop when the app goes into baground or, got closed. By this way I'll be able to calculate the total study time easily than the traditional rough time calculation.

  And there will be stats about how many hours I studied, on a daily basis & if there will be an option to set goals about daily reading of fixed hours & with Google calender integration, it'll be all in one app for study.