App uses for this trick 24 cards.You need a companion for this trick. Your 5 years daughter or son will be an excellent companion. You can use this trick to impress your friends or colleagues.
After shuffling the cards your friends should randomly select 5 cards.
One of your friends should select and flip the Magic Card: one of this 5 cards. Your companion should Not see the Magic Card. You have to put the remaining 4 cards in an envelope and ask your companion to take the envelope. The companion takes the envelope, uses the app and tells the Magic Card Suit and Rank.
In order to use the app you need to be a smart person, understand the Algorithm and put in the envelope Cards in a Special Order.
Companion role is easy. He (she) should use the app, select those 4 cards and click Go. The Magic Card will appear on the screen.