Music · v1.1.1
Does play_music_theory work on iPhone Duo?
Not confirmed yet. play_music_theory runs normally on iPhone Duo's outer display, but there's no reliable report yet of how it looks on the inner display.
At a glance
- Inner display (7.6″)
- Not confirmed yet
- Outer display (5.4″)
- Works normally
- Split View
- Supported
- Every app, automatically
- iPad version
- No
- Phone-only layout today
- Latest version
- v1.1.1
- Sep 17, 2026
- Duo in release notes
- Not yet
On the inner display
iPhone Duo shows each app in one of three ways depending on which SDK it was built with: letterboxed with black bars (iOS 26 or earlier), expanded with some empty space (iOS 27), or full screen (iOS 27.1 and later). We don't yet know which applies here.
play_music_theory has no iPad version today, so its layout has only ever been designed for phone-sized screens. That doesn't mean it won't adapt — only that its developer is starting from a phone layout rather than an iPad one.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including play_music_theory. 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
None confirmed yet. Duo-specific features include side toolbars, layouts that react to the fold, and content on the outer display while the app is open inside.
Evidence & history
No public evidence yet. iPhone Duo ships on October 23, 2026; if you have one, tell us how play_music_theory looks — a screenshot helps.
Latest release notes
Version 1.1.1 · Sep 17, 2026
Undo: take back your last line with the new back arrow. On iPad, Command Z works too.
Questions
Does play_music_theory work on iPhone Duo?
Not confirmed yet. play_music_theory runs normally on iPhone Duo's outer display, but there's no reliable report yet of how it looks on the inner display.
Does play_music_theory 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 play_music_theory 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.
Will play_music_theory have black bars on iPhone Duo?
It depends on the version of Apple's SDK the current build of play_music_theory uses: iOS 26 or earlier means black bars, iOS 27 means mostly filled, iOS 27.1 means full screen. We'll update this page as soon as there's evidence.