The app, step by step. The rules are on their own page; this is what you'll see and what to tap.
Someone deals a game and picks Switch at the top of New game. You get the invitation the same way as any table — say Deal me in. The table deals itself when everyone has answered: seven cards each, one turned up to start the pile.
The pile's top card sits in the middle, the stock beside it face down with its count. Under the top card is the suit in force — usually the card's own; after an eight, the one that was named.
Tap a card that matches the top by suit or number, then Play. Cards that don't match sit dim. Tap an eight and four suit buttons appear — pick the one you want the table to follow.
Draw takes one card from the stock and passes the go. When the stock is gone, the pile turns over and becomes the new stock by itself.
Someone plays their last card and the results card comes up: the order, the points each hand was caught with, and the crown on the winner. Rematch deals the same table again.