Mahjong solitaire with a full board on both Duo displays
Does Shanghai Ultra work on iPhone Duo?
Yes, the developer says so: the App Store release notes for version 1.30 of Shanghai Ultra mention iPhone Duo support, and its site shows the board closed and open.
- Developer claimedThe developer, in the App Store release notes for version 1.30 (released October 9, 2026), which add iPhone Duo support, and on its website, with screenshots of the board on the cover, open, and open turned upright. The screenshots don't say how they were made.
Adapted for the fold
- Closed · Outer display
Board beside the controls
On the cover, the new-game, hint, pause and navigation controls sit in a column to the right of the board.
- Open · Inner display
Open, either way up
Open, the controls stay on the right. Turned upright, they move above the board, with navigation below it.
About Shanghai Ultra
Shanghai Ultra is a mahjong solitaire game. Version 1.30 adds iPhone Duo support, and the developer’s screenshots show the tile board filling the play area on the cover and the open display, with the controls moving from the side to above and below the board when the open phone is turned upright.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· Developer media reviewed
Developer claimed · iphone-duo
Looked at the developer's three Duo screenshots (folded-play-1, unfolded-play-1 and portrait-play-1): the tile board with the Duo's system controls on the cover, open, and open turned upright.
Poses shown: Closed, Open. These are observations of the evidence, not a test of every interaction.
App version: Not recorded in this evidence.
The site calls them screenshots but doesn't say whether they come from the simulator or a running app. No build number, app test, hardware, folding or half-folded layout was verified.
View reviewed evidence ↗
Related guides
iPhone Duo games: what's coming, and what the fold does for play
Which games have been shown on iPhone Duo, how un-updated games look on the open display, and the new kinds of play builders are making with the hinge, the half fold and two screens.
The best iPhone Duo apps so far (October 2026)
The apps worth installing on day one, from Apple's four launch partners to indie apps whose developers have shown a real iPhone Duo layout, picked for what they do when you open the phone.
Do your apps work on iPhone Duo? What happens before they're updated
Every iPhone app opens on iPhone Duo, but only updated ones fill the inner display. What an app looks like before its developer adapts it, how to tell which are ready, and which popular apps have said so.
Is this your game?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
<a href="https://foldhunt.com/games/shanghai-ultra/"><img src="https://foldhunt.com/badges/featured-on-foldhunt.svg" alt="Featured on FoldHunt" width="220" height="54"></a>Need to update the listing? Email the editor.
Sources: Shanghai Ultra on the developer's site, with Duo screenshots (us.nz) · Shanghai Ultra on the App Store (apps.apple.com)
More for iPhone Duo
Orisuji
Adrien Friggeri
A paper maze you solve by folding the phone: fold it to lay one page on the other
Simulator verified: Adrien Friggeri, the game's designer, in an email to FoldHunt on October 15, 2026, with a recording of the game in the iPhone Duo simulator on the press page (orisuji.com). Orisuji comes out on October 23, 2026, and is on pre-order on the App Store, whose description says it is designed for iPhone Duo: folding the phone is the move. On other iPhones and on iPad, the two pages sit side by side and you fold with a tap or a pinch.
- Open
- Closed
Cube: 3x3 Cube Solver
Haruhiko Kishi (MusicFlow)
A cube solver and solve timer, with a two-hand pad for the half-folded Duo
Simulator verified: MusicFlow, in an article on note.com on October 7, showing Cube 1.3.0 in the iPhone Duo simulator: the timer puts the clock above a two-hand pad. The current App Store version, 1.3.2, came out on October 10.
- Open
- Closed
Fold: Gravity Puzzle
SixTwelve Studio
A gravity puzzle that widens as the Duo opens, with face-to-face tabletop duels
Developer claimed: The developer, in the App Store release notes for version 1.0.3 (released October 10, 2026): opening the phone widens the chamber without restarting the run; half-folded, aiming moves to the lower half; laid flat, two players race face to face. The developer's product page also names the iPhone Duo.
- Open
- Book