Root Booster is an app that lets you activate several special modes for your rooted Android device. Obviously you do need superuser privileges to get any use out of this app. If not, there's not much sense in downloading it.
Using Root Booster is simple: in the pullout menu on the left you'll find six different modes you can activate on your device. Just tap any of them to find out exactly what it does and then activate it. The modes include: speed, performance, and stability.
Root Booster is a very useful tool for people with rooted Androids, especially those who don't have very powerful devices.