To be able to use Toolbox for Minecraft: PE, as you might expect, you have to have Minecraft Pocket Edition on your device already. Otherwise the app is of no use whatsoever. It's important to keep in mind, as well, that you need the full version of Minecraft, as it doesn't work with the demo.
Toolbox for Minecraft: PE is a very interesting app for Minecraft lovers as it lets you gets way more out of the Minecraft gaming experience on Android.
Requires Android 4.0.3 or higher.