App - simple black-white stopwatch.
1. Button on bottom: start/pause/stop timer
2. Button on top: reset timer
3. Format data: hh:mm:ss.ms
4. Presentation of the current date and time
5. When you press home key timer will be still run.
If on bottom is text "START" then the timer is stopped.
If on bottom is text "STOP" then the timer is running.