A number puzzle that puts the score and pieces beside a larger board on the open Duo
Does Tenchain work on iPhone Duo?
Yes, the developer says so: version 1.4.0 has a larger board with a side panel, and your game carries on when you fold or unfold the phone.
- App Store confirmedSerhii Kotenko, the developer, in the App Store release notes for version 1.4.0 (released October 14, 2026), which describe a bigger board on iPhone Duo and iPad, with score, pieces and daily goals in a side panel, and a game that carries on when you fold or unfold the phone. The App Store pictures show ordinary portrait phone screens.
Adapted for the fold
- Open · Inner display
A board beside its panel
Open, the board gets bigger, and the score, pieces and daily goals move into a side panel. A setting puts the controls on the left.
About Tenchain
Tenchain is a number puzzle. Place numbered tiles from 1 to 9 on a five-column board, and when two or more neighboring tiles in a row or column add up to exactly 10, they clear. The tiles above fall, which can set off chains that multiply your score. Play Classic, Time-Limited or Speed mode, or the Daily Challenge, the same puzzle for every player.
Version 1.4.0 adds a bigger board on iPhone Duo and iPad, with the score, pieces and daily goals in a side panel. Fold or unfold the Duo mid-game, and your game carries on. The update also lets the Duo and iPad rotate.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· App Store page reviewed
App Store confirmed · iphone-duo
The App Store release notes for version 1.4.0 (released October 14, 2026) mention iPhone Duo: "iPhone Duo and iPad: a bigger board, with score, pieces and daily goals in a side panel"
App version: 1.4.0.
Store text only: we haven't seen the app running, and the store page doesn't show how each pose is used.
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 now that iPhone Duo is on sale, from the apps Apple named as 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/tenchain/"><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.
More for iPhone Duo
Find Objects: Hidden & Diff
Nguyen Vinh
A cozy hidden-object game where spot the difference opens like a book across the fold
Simulator verified: Nguyen Vinh, the developer, in a submission to FoldHunt on October 26, 2026, with a 24-second recording from the iPhone Duo simulator and a public TestFlight. The App Store seller is Nguyen Vinh. The release notes for version 1.2.6 (released October 24, 2026) say it is made for iPhone Duo.
- Open
- Closed
Starlift: Falling Block Puzzle
Banjo Obayomi
A block-launching puzzle game where two players face off across the Duo's fold
Simulator verified: Banjo Obayomi, the developer, in an email to FoldHunt on October 22, 2026, and posting as banjtheman in a comment on r/iosgaming. The press kit says the Duo support was built in Apple's simulator ahead of the hardware, and has unframed iPhone Duo screenshots at the size of the simulator's open display. The App Store seller is Temidayo Obayomi. The notes for version 1.0.1 (released October 17, 2026) say keepers beaten together in Team Boss on iPhone Duo are now saved.
- Open
- Closed
Blackbox
Ryan McLeod / Shapes and Stories LLC
Puzzles you solve without touching the screen, adapted to every pose of the Duo
Simulator verified: Shapes and Stories, Ryan McLeod's studio and the developer, in a submission to FoldHunt on October 17, 2026, saying the challenges and every part of the interface adapt to the iPhone Duo's poses, sometimes with new ways to play, ready for launch day. In an email that followed, Ryan said the Duo build has been tested extensively in the simulator. The press kit's iPhone Duo section (blackboxpuzzles.com) shows the game on a rendered Duo closed, open, half-folded and standing as a tent. Version 3.3 on the App Store (released October 22, 2026) says "Over 100 views were rebuilt so you can fold, stretch, rotate Blackbox all day long" but doesn't name the Duo.
- Open
- Book
- Standing