And for all of you people you don't have to use that! You can just type in the chat (if your on a flat world) type in: /fill 2000 0 2000 2000 (how many blocks deep) 2000 (the block you want) then that's it! This works for android and iOS but it may be a little laggy so be warned...but it works really well. Enjoy!
Sorry for the mistake on the first comment, I did 2000 0 2000 and I messed up on the other 2000s. Because they were supposed to be -2000 :)
Now compatible with 1.0.X