20ClockThe Clock app has many features to go with its world clock abilities. Set alarms, use it asa stopwatch, and even turn it into one (or more!) countdown timers.Alarm: Tap the New Alarm/+ button to add an alarm. From hereyou can choose the time of day, the sound the alarm makes(including music), on what days it repeats, and its name.World Clock: By default, this displays your current time. You can addother world clocks by using the world button and then selecting one ormore cities. Use the Back arrow to get out of the city selection process.Pressing the Menu button lets you configure the exact behavior of theclock.Countdown Timer: Use the keypad to enter in a length of time, thentap “Start”. Once you’ve started a timer, you can change its labelextend the time , stop it, or delete it . You can also use the +button to add more timers, which can run simultaneously if you like.