Games v1263
Does Block Out! work on iPhone Duo?
It works, but with black bars. Block Out! 1263 is built with the iOS 26.4 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 26.4 SDK
- Version 1263, read Oct 29, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v1263
- Oct 27, 2026
- Duo in release notes
- Not yet
About Block Out!
Block Out! is made by Grand Games A.Ş. and first came out on the App Store in October 2025. It's #2 on today's US App Store top charts. It has 351,495 ratings on the US App Store, averaging 4.7 stars. Version 1263 came out on Oct 27, 2026 and needs iOS 13.0 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, Block Out! is #64 of them.
From its App Store listing:
Get ready for Block Out!, a block puzzle game where every level feels alive. Slide colorful blocks, match them with their targets while experiencing the unique twist of moving elevators and block generators. Each puzzle feels fresh with ever-changing layouts. Plan your moves, think quickly, and enjoy the satisfaction of perfect clears as you progress through a colorful and evolving puzzle adventur…
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 Block Out!. 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 1263 is built with the iOS 26.4 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 26.4 SDK
Latest release notes
Version 1263 · Oct 27, 2026
Are you ready for an update? - Brand-new levels are waiting for you! - Bug fixes for a smoother experience. - UX improvements to make your adventure even better!
Questions
Does Block Out! work on iPhone Duo?
It works, but with black bars. Block Out! 1263 is built with the iOS 26.4 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Block Out! 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 Block Out! 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 Block Out! 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 Block Out! 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 Block Out! within about a day of its release and update this page.
What can I do about the black bars until then?
Use Block Out! 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.