Pass-and-Play Games on One Phone: How They Work

What pass-and-play is

Pass-and-play means two or more people share one device and hand it over after each turn. Nobody needs a second device or an account. The device is the board, and each turn it changes hands.

How a game keeps your side secret

Some games depend on hidden information: your fleet, your secret person, your dice, your colour code. If the phone shows your side when it changes hands, the game is spoiled. In Twofold, a cover screen between turns hides everything.

1. You finish your turn and tap the Pass button, such as "Pass to Sam".
2. A cover appears and names the next player, in a line such as "Sam, you're up."
3. Sam takes the phone and taps Reveal. Sam's own side appears.
4. If the wrong person is holding the phone, the cover tells them to pass it on without looking.

What happens on iPhone Duo

iPhone Duo is a book-style foldable phone with a small outer screen and a large inner screen. Twofold is built for it, and in Broadside the fold does the hiding.

• Half-folded on its side, the raised screen covers your board.
• Folded shut, the outer screen shows who plays next.
• On opening, your board stays covered until you tap Reveal.

The fold behaviour above is for Broadside. The other hidden-information games use the cover and the Pass button.

Which games work this way

Five of the seven games in Twofold hide information, so they use the cover between turns.

• Broadside: hide your fleet and fire shots to sink theirs.
• Who's Who: each player has a secret person, and you ask yes or no questions to find theirs.
• Liar's Dice: hide your dice, raise the bid, call the bluff. See the Liar's Dice rules.
• Codebreaker: hide a secret colour code and crack theirs in fewer guesses.
• Fog of War: chess where you only see what your pieces can reach. See chess and Fog of War.

Chess and Four in a Row have nothing to hide, so they have no cover. The phone lies flat between two players and by default each player gets one half of the screen, turned to face them. See Four in a Row.

Do pass-and-play games work on iPad?

Twofold plays on iPhone and iPad. Outside Broadside on iPhone Duo, and on any device without a fold, you tap Pass between turns.

Which pass-and-play games are free?

Twofold is free to download, and each game is free to play once. After that you can buy a game on its own, or all games in one purchase, including games added later. The App Store shows the price in your currency.

Play pass-and-play on one phone

Download Twofold on the App Store

More two-player games on one phone: see all games.