Activate Commands Mod minecraft pe was created specifically for MCPE. Activate Commands Mod activates "debug mode" in the game and includes commands that have been shown to us in Minecon 2015, but were not added to the release of the game. If you can't wait and want to be able explore the new commands right away then you can get the Activate Commands Mod which adds all of the commands we are likely to see in the official release of Minecraft PE.
Note: This "Activate Commands Mod" app is not affiliated with Minecraft, Mojang or Microsoft