Reference v13.1.2
Does Sky Guide work on iPhone Duo?
Yes. Sky Guide is built for iPhone Duo — it runs full screen on the 7.6-inch inner display and adapts its layout for the fold.
At a glance
- Inner display (7.6″)
- Built for Duo
- Outer display (5.4″)
- Works normally
- Built with
- iOS 27.1 SDK
- Version 13.1.2, read Oct 24, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v13.1.2
- Oct 24, 2026
- Duo in release notes
- Mentioned
On the inner display
The app reaches the edges of the inner display. Text and controls stay a comfortable size instead of being blown up.
Apple named it in its iPhone Duo launch roundup on October 22: it shows edge-to-edge star maps with Liquid Glass controls.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Sky Guide. Open it on the inner display, then add a second app next to it. You can save the pair and come back to it later.
Duo-specific features
- Adaptive layoutRearranges into sidebars or multiple panes on the inner display instead of just stretching.
Evidence & history
Apple,
Developers bring incredible new app experiences to iPhone Duo (Apple Newsroom)
Apple says it shows edge-to-edge star maps with Liquid Glass controls.
App build,
Version 13.1.2 is built with the iOS 27.1 SDK
Apps built with the iOS 27.1 SDK or later can use the whole inner display.
Release notes,
Release notes for version 13.1.2
Minor bug fixes New in 13.1: + iPhone Duo Support Sky Guide is now optimized for iPhone Duo, beautifully expanding as you unfold the display for a broader, more…
App Store,
App Store listing has screenshots made for iPhone Duo
The developer published 7 screenshots for iPhone Duo’s inner display.
- : Not confirmed yet → Built for Duo — Named in Apple’s iPhone Duo launch roundup
Latest release notes
Version 13.1.2 · Oct 24, 2026
Minor bug fixes New in 13.1: + iPhone Duo Support Sky Guide is now optimized for iPhone Duo, beautifully expanding as you unfold the display for a broader, more immersive view of the universe.
Questions
Does Sky Guide work on iPhone Duo?
Yes. Sky Guide is built for iPhone Duo — it runs full screen on the 7.6-inch inner display and adapts its layout for the fold.
Does Sky Guide work on the outer display?
Yes. iPhone Duo's 5.4-inch outer display behaves like a regular iPhone screen, so every iPhone app works there as usual.
Can I use Sky Guide in Split View on iPhone Duo?
Yes. On iPhone Duo every app can be placed side by side with another app on the inner display — developers don't need to opt in. How comfortable it feels at half width depends on the app's layout.