The Alarm Clock version 1.6.1 is a minor update that re-enables the proximity detection feature that was removed from an earlier version. The iPhone SDK 3.0 now officially supports the use of the proximity detector in third party iPhone OS applications.

If you dislike the iPhone glowing even with the brightness level set to its lowest value then switch Proximity Sensing in advanced options to on and set the phone upside down on your nightstand. This will turn the display completely off until you pick up the phone.

The Alarm Clock version 1.6 adds another user requested feature. The application now monitors the battery power level when the device is unplugged and sounds a warning when the level falls below a user defined threshold.

This new feature can help you avoid waking up to a dead iPhone if you forget to plug-in your power adapter or if you have a power outage overnight.

The Alarm Clock version 1.5 was finally released! Now you can choose any song in your iPod library as an alarm sound.