Bend the phone to charge a paper catapult, then open to launch
Does FoldFling: Hinge Catapult work on iPhone Duo?
Yes, the developer says so: half-fold the Duo and press down to charge a catapult shot, then open it to launch.
- App Store confirmedUniation Software Co.,Ltd., the developer, in the App Store description for version 1.0 (released October 14, 2026), which says the Duo's hinge is the catapult's throwing arm. Touch controls can be switched on in Settings.
Adapted for the fold
- Book · Partly folded
Press down to charge
Half-folded like a laptop, pressing the top half down winds up the catapult, and the deeper you press, the harder the shot. The lower half sets the aim, and opening the phone lets go.
About FoldFling: Hinge Catapult
FoldFling is a handmade paper-craft puzzle in which a cardboard castle folds, crumples and tumbles. On the Duo, the hinge is the catapult arm: bend the phone to charge a shot, set the aim with the lower half and open it to release. Drag-back touch controls play the same levels on every iPhone.
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 description mentions iPhone Duo: "On iPhone Duo and other foldable iPhones, use the real hinge as the catapult arm." (version 1.0, released October 14, 2026).
App version: 1.0.
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.
iPhone Duo poses: closed, open, book, standing and Split View
A plain-language guide to the ways you will hold iPhone Duo, what the phone itself does in each, and the apps and ideas that make the most of them. For anyone buying one, and for anyone building for it.
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.
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Sources: FoldFling: Hinge Catapult on the App Store (apps.apple.com)
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