Sleep is an application that will automatically respring your iPhone or iPod Touch after a specified amount of time. When you open Sleep, you will see two wheels…one for Hours and one for Minutes. You can use them to choose how long you would like before your iPhone/iPod Touch resprings. The interface is slick and simple. Yet another app/function that Apple should have included with the device to begin with.

Let’s say, for example, 1 hour and 30 minutes. Once you have chosen your amount of time, select Start in the lower left corner. This will bring up a Z.z.z.Z icon at the top of the page as well as the amount of time that is left before it resprings. Now, to actually enable Sleep, you will need to press the Home Button to exit the application (not the Exit button in the lower right corner).

The nice thing about this app is that when it resprings your SpringBoard, it brings it to the lock screen. Which means, if you want to listen to music as you fall asleep and you set Sleep for 30 minutes, it will respring to your SpringBoard and lock the screen. That way, it does not sit unlocked and drain your battery all night.

Very useful tool for preserving your iPhone’s batteries while sporadically using the device. The download is free right on Cydia if you have a jailbroken iPhone.