1.Click on "Stopwatch" icon or "Hourglass" icon to enter different function.
2.In "Stopwatch" tab. Click "Start", while stopwatch running, click "Record" to record intermediate time.
3.In "Hourglass" tab. Use "+" "-" button to set count down time. You can set up to 99 minutes. Click "Start".
4.While timer counting down, there is notification in notification bar. It contains information when the count down stops. Click it can bring you back to stopwatch application.
5.When count down to 0, there will be a message sound.

Screenshots: