Nice way to keep track of an activity. It works. Its a clean interface with nice options to personalize. It is not glitchy. It allows total vs average duration. Individual activities can be reviewed over different periods of time or a specific date.
Suggestions to make it even better:
* Hold off starting timer when activity is tapped. It may be an extra step but I would rather start the clock after tapping activity
* Ability to resume a timer not start over
* Timer on more than one task occurring at the same time or overlapping.
* Group activities by color
* Ability to reposition an activity in the list
Pandabear62 about BusyBox - Track your time