Games v2.2.0
Does Mahjong Blast work on iPhone Duo?
It works, but with black bars. Mahjong Blast 2.2.0 is built with the iOS 26.2 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
At a glance
- Inner display (7.6″)
- Black bars
- Outer display (5.4″)
- Works normally
- Built with
- iOS 26.2 SDK
- Version 2.2.0, read Nov 3, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v2.2.0
- Nov 2, 2026
- Duo in release notes
- Not yet
About Mahjong Blast
Mahjong Blast is made by Nebula Studio and first came out on the App Store in June 2025. It's #26 on today's US App Store top charts. It has 646,098 ratings on the US App Store, averaging 4.9 stars. Version 2.2.0 came out on Nov 2, 2026 and needs iOS 15.0 or later. It's free to download. Among the 238 games we track on the US App Store, 34 already fill the inner display, 9 are partly adapted and 187 still show black bars. By number of ratings, Mahjong Blast is #49 of them.
From its App Store listing:
Mahjong Blast is the best free puzzle game for seniors and adults — a relaxing offline mahjong solitaire game designed for players who love matching games, tile games, brain games, casual games, and calming puzzle solving experiences. 100% ad free with no annoying pop-ups or interruptions, play anytime, anywhere — no WiFi or internet connection required. Match identical tiles, clear satisfying boa…
On the inner display
Apps built with older SDKs are placed in a phone-sized safe area on a black background. Everything works; you just don't get the bigger screen.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Mahjong Blast. 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
App build,
Version 2.2.0 is built with the iOS 26.2 SDK
Apple runs apps built with the iOS 26 SDK or earlier in a phone-sized window on the inner display.
- : Not confirmed yet → Black bars — built with the iOS 26.2 SDK
Latest release notes
Version 2.2.0 · Nov 2, 2026
Bug fixes & performance improvements Enjoy a smoother Mahjong experience designed to help you unwind and sleep better.
Questions
Does Mahjong Blast work on iPhone Duo?
It works, but with black bars. Mahjong Blast 2.2.0 is built with the iOS 26.2 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Mahjong Blast 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 Mahjong Blast 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.
Why does Mahjong Blast have black bars on iPhone Duo?
Apps built with the iOS 26 SDK or earlier run in a phone-sized window on the inner display, and iOS 27 builds can still leave some space empty. The bars disappear once the developer rebuilds the app with the iOS 27.1 SDK — you only need to update the app.
When will Mahjong Blast fill iPhone Duo's inner display?
When its developer releases an update built with the iOS 27.1 SDK or later. We read the SDK of every new version of Mahjong Blast within about a day of its release and update this page.
What can I do about the black bars until then?
Use Mahjong Blast on the outer display, where it works like on any iPhone, or put it in Split View next to another app on the inner display so less of the screen goes unused.