IGNORE THAT APP. There is a very slim chance that it is the same thing, as it has been around since January and has tons of installs and ratings. I doubt Ed would keep that from the public for so long. If I'm wrong, I'm wrong.
The only thing we know is that http://www.mydcoin.com was registered on February 25, 2014, the same day that mj-pay.com was registered, and Ed updated the site once it was discovered on the board.