Salaat First is an app designed to help Muslims pray properly. The app has everything, from a compass that points in the direction of Mecca to a comprehensive schedule with all the hours of the day when it's necessary to pray.
The app also explains the steps for performing a proper salat and even has several different widgets that can be added to your Android device's desktop. These widgets will count down the time remaining until the next prayer.
Salaat First is an extremely useful app for any follower of Islam. The app interface is well-designed and simple with plenty of useful tools. It's also pretty lightweight (under 10 megabytes) and works on many different Android devices.