A sky map of stars, planets and constellations that widens when the Duo opens
Does Star Gazer - Astronomy Sky Map work on iPhone Duo?
Yes, the developer says so: the App Store release notes for version 3.1.0 of Star Gazer describe a wider sky view when the Duo opens, adapting again as it closes.
- App Store confirmedThe developer, in the App Store release notes for version 3.1.0: open, the Duo shows a wider sky view, and the map adapts as the phone folds.
Adapted for the fold
- Open · Inner display
More sky when open
Opening the phone gives the sky map more room; closing it returns the map to the smaller screen.
About Star Gazer - Astronomy Sky Map
Star Gazer identifies the stars, planets and constellations above you. Version 3.1.0 adds a wider sky view for the open Duo, the release notes say, and the map adapts again when you close the phone.
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 3.1.1 (released October 22, 2026) mention iPhone Duo: "New in this version: * Made for iPhone Duo: Enjoy a bigger sky view when unfolded, and a smooth transition when you fold it back."
App version: 3.1.1.
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 ↗· Developer statement reviewed
Developer claimed · iphone-duo
Read the current 3.1.0 Duo notes and looked at the App Store screenshots.
App version: 3.1.0.
The screenshots show ordinary phones and tablets. The older 3.0.4 notes contain unfinished placeholder text. No Split View behavior is claimed.
View reviewed evidence ↗
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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.
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Sources: Star Gazer on the App Store (apps.apple.com) · Apple lookup: current version and seller (itunes.apple.com)
More for iPhone Duo
Sky Guide
Fifth Star Labs LLC
A stargazing guide whose sky view widens as the phone unfolds
Launch partner: Named by Apple in its Newsroom article of October 22, 2026, on apps optimized for iPhone Duo. The App Store release notes for version 13.1 (released October 14, 2026) say Sky Guide is optimized for iPhone Duo and that the sky view widens as the phone unfolds.
- Open
DexFold
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A talking Dex that folds like the real one, with a data screen when half-folded
Simulator verified: IntraPixel, the developer, in a submission to FoldHunt on October 18, 2026, with pictures of the closed and open layouts on the app's website (intrapixel.com). The App Store seller is Hernan Rosario. The App Store description describes the closed, open and half-folded layouts.
- Closed
- Open
- Book
Nihongo
Serpenti Sei Japan LLC
A Japanese dictionary that keeps the page you're reading beside the definitions
Simulator verified: Serpenti Sei Japan, the developer, in a submission to FoldHunt on October 9, 2026, saying the iPhone Duo update will be on the App Store in time for the October 23 launch, with a screen recording of it in the iPhone Duo simulator (screen.studio). The developer says the layout was also tried on a real iPhone Duo at a workshop at Apple's Japan headquarters. The App Store seller is Serpenti Sei Japan LLC (id 881697245). The release notes for version 1.36 (released October 19, 2026) say Nihongo adapts as you fold and unfold iPhone Duo, making the most of both displays.
- Open
- Book