Droid timer and stopwatch is a simple and easy to use digital timer and stopwatch.
The interface is very user friendly and beautiful.
You can switch between stopwatch mode and timer mode using the menu.
When the timer counts to zero, the phone will vibrate and make a sound.
The sound is same as the notification sound and the volume is also the same as the notification sound volume.
Droid timer and stopwatch: https://market.android.com/details?id=com.williamkingdom.timer