Shake Shake Shake Only 9S

Shake Shake Shake. is limited to the 9th of Spade
Effect:
The magician gives a card to choose; which must be memorized or remembered by the viewer and/or the audience. The magician then asks the spectator to insert the card into the deck and shuffle to prevent the magician from knowing its location or value.
The magician leaves the deck on the table... Flipping the first card as if it were the spectator's chosen card. But this time the magician has failed. He leaves the card on top of the deck and to correct the problem he shows his cell phone he puts it on the deck of cards.
Tap on the device's screen to activate it... and that's it.... The card that the magician showed becomes visible on the screen, when he sees that the problem continues, he takes the cell phone and shakes it "Shake" three times while on the screen you can see how the card transforms into the one chosen by the spectator.
But it's not all, the magician asks the spectator to flip over the card that he previously said it wasn't, and magically it has also transformed.
This app will transform any of the nines into six of the chosen pint.
Note: You must be able to force a card and control it.