Almost there.
Pretty good app! Almost perfect for the disciplined music student! Two possible improvements would be: to be able to modify the measurement of the amount of time spent on a subject the day after, for it happens to leave the stopwatch on; and also I would find extremely useful a calculator of average time spent on each subject and of total practice.
Demarco Da Lio about
Music Journal Pro - Practice + metronome app to log time and bpm