Games v1.13.3
Does Sled Surfers work on iPhone Duo?
It works, but with black bars. Sled Surfers 1.13.3 is built with the iOS 26.1 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 26.1 SDK
- Version 1.13.3, read Oct 24, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v1.13.3
- Oct 21, 2026
- Duo in release notes
- Not yet
About Sled Surfers
Sled Surfers is made by Crazy Labs and first came out on the App Store in April 2025. It's #49 on today's US App Store top charts. It has 83,593 ratings on the US App Store, averaging 4.6 stars. Version 1.13.3 came out on Oct 21, 2026 and needs iOS 15 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, Sled Surfers is #118 of them.
From its App Store listing:
SLIDE fast as you can! Race through snowy slopes in Sled Surfers, the ultimate winter SLEDDING GAME! DODGE trees, leap over ice, and grab power-ups as you speed downhill. Slide through snow into mountains, forests, cities, subways, caves, and beyond. How far can you go? Inspired by ENDLESS RUNNER hits, Sled Surfers delivers FAST action, SMOOTH controls, and endless FUN. Features: • High-speed sled…
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 Sled Surfers. 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 1.13.3 is built with the iOS 26.1 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 26.1 SDK
Latest release notes
Version 1.13.3 · Oct 21, 2026
Snow update here! We squashed pesky bugs and fine-tuned gameplay to make every run smoother and faster. Fewer bumps, better flow, and more fun downhill action. Update now and keep sledding without interruptions!
Questions
Does Sled Surfers work on iPhone Duo?
It works, but with black bars. Sled Surfers 1.13.3 is built with the iOS 26.1 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Sled Surfers 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 Sled Surfers 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 Sled Surfers 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 Sled Surfers 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 Sled Surfers within about a day of its release and update this page.
What can I do about the black bars until then?
Use Sled Surfers 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.