Bedtime, naps and a mood diary, shown on the Duo's cover and its open inner screen
Does SleepTap work on iPhone Duo?
According to its developer, yes. FoldHunt's editor hasn't checked SleepTap on iPhone Duo yet, so it's listed as a claim.
- Developer claimedThe developer, Zhao Xin, in a post on X on October 10, 2026 saying version 1.7.3 already supports iPhone Duo, with the app's new App Store screenshots of the inner and outer displays (@owenzhao on X). The release notes for 1.7.3 (released October 10, 2026) don't mention the Duo. The App Store seller is 鑫 肇.
Adapted for the fold
We're waiting on details of exactly what SleepTap changes for the fold. Are you the developer? Tell us.
About SleepTap
SleepTap plans sleep around your wake time, with a bedtime countdown, naps and sunlight sessions started from the iPhone or Apple Watch, and a mood diary. Zhao Xin says version 1.7.3 supports iPhone Duo. The App Store screenshots in the post show the sleep schedule, the Today page, the mood check-in and the diary on the cover, with the tabs in a rail down the side, and the same pages on the open inner screen held upright, one column made wider with the tabs along the bottom. Nothing in them is placed around the fold.
Related guides
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 app?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
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Sources: Zhao Xin on X (x.com) · SleepTap on the App Store (apps.apple.com)
More for iPhone Duo
JoyJar
ReAlign Leadership LLC
A shared gratitude jar: open the Duo and the jar faces a joy from it, like a book
Simulator verified: ReAlign Leadership LLC, the developer, in a submission to FoldHunt on October 21, 2026, with a plain screen recording of the app on the iPhone Duo simulator (iOS 27.1) on YouTube and a page about the Duo layouts (joyjar.app). JoyJar is coming soon to the App Store and Google Play.
- Open
- Book
- Closed
- Split View
Penjo: Pencil Journal, Planner
Zafer ARICAN
A handwritten journal: today's page on one side of the fold, today's plans on the other
Simulator verified: Zafer ARICAN, the developer, in a submission to FoldHunt on October 20, 2026, with simulator screenshots and recordings on the Penjo site (penjoapp.com). The release notes for version 3.8 (released October 20, 2026) say Penjo is now optimized for iPhone Duo in every pose: open, the page uses Penjo's iPad layouts; in the book and seated poses it stays clear of the fold; fold it shut and the journal closes.
- Book
- Open
- Closed
- Standing
Megu: SI Closet & Planner
JA Technology Consulting LLC
A digital closet and AI stylist, with the piece you tap beside the grid when open
Simulator verified: Jake Antebi, the founder of Megu, in an email to FoldHunt on October 22, 2026, saying Duo support is live with a layout designed for the unfolded screen, and in a post on the Megu blog on October 19, 2026 saying the Duo layouts arrived in version 1.6. The press kit holds unframed captures of the app on the Duo's cover and open display, at the simulator's screen sizes. The App Store seller is JA Technology Consulting LLC. The release notes for version 1.8 (released October 22, 2026) say: "Improvements for iPhone Duo."
- Closed
- Open
- Book