Games v1.19
Does Royal Smash! work on iPhone Duo?
It works, but with black bars. Royal Smash! 1.19 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 1.19, read Nov 2, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v1.19
- Oct 31, 2026
- Duo in release notes
- Not yet
About Royal Smash!
Royal Smash! is made by Cypher Games and first came out on the App Store in June 2026. It's #38 on today's US App Store top charts. It has 158,628 ratings on the US App Store, averaging 4.7 stars. Version 1.19 came out on Oct 31, 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, Royal Smash! is #96 of them.
From its App Store listing:
Welcome to Royal Smash, the ultimate physics puzzle game! It takes seconds to learn, but mastering every royal level requires true precision and perfect timing. Download now and claim your crown!
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 Royal Smash!. 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 1.19 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 1.19 · Oct 31, 2026
Welcome Back gifts are here!: Been away for a while? Come back to a stack of coins, unlimited lives and boosters waiting for you. Hold to See the Table: Out of moves? Press and hold to look at the table before you decide whether to keep going. Fresh look: New booster icons, a redesigned Power Play start screen and updated wood textures. Level updates: New levels, smoother difficulty across many existing ones, and better multi-stage levels.
Questions
Does Royal Smash! work on iPhone Duo?
It works, but with black bars. Royal Smash! 1.19 is built with the iOS 26.4 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Royal Smash! 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 Royal Smash! 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 Royal Smash! 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 Royal Smash! 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 Royal Smash! within about a day of its release and update this page.
What can I do about the black bars until then?
Use Royal Smash! 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.