The Secret of the mDeck is partly in the app itself. The mDeck-App helps the mDeck-Performer line up everything in the actual physical mDeck so that the magic works. The App tells the magician something special so that the magician will know what to do. Hint, before the app came into existence, what was there to fulfill that role for the magician?

Steffan Soule performed the mDeck for many years before developing this app in response to covid-19, as an aid for performers everywhere who have a good mind and a deck of cards, both of which should be easy to obtain for anyone.