With this app you can disable or enable both your user-installed apps and the preinstalled Android apps. With one tap you can toggle between enabled and disabled states.

What's the benefit of disabling a built-in app?

Normally Android applications that came preinstalled on Android devices can be a little cumbersome: it can eat your battery or even make your phone to struggle with different actions you're not aware of.

By disabling a preinstalled app you give your Android device room to grow reduce battery usage and even get rid of certain icons in the launcher you can't usually remove because it came preinstalled. For example are you a Gmail user but you also have a Mail app impossible to uninstall? With this app you can disable it.

Why disable it and not uninstall it?

Simple: if you screw something up you can always came back to the app and re-enable it. If you suffer for any force-close or apps becoming unresponsible go back to the app and toggle the state once again. If you uninstalled the app you're no longer able to recover it unless you have a backup somewhere and still it won't probably be as it was before.