Games v43.00
Does Fortnite work on iPhone Duo?
It works, but with black bars. Fortnite 43.00 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 43.00, read Nov 2, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v43.00
- Nov 1, 2026
- Duo in release notes
- Not yet
About Fortnite
Fortnite is made by Epic Games Inc. and first came out on the App Store in May 2025. It's #4 on today's US App Store top charts. It has 402,514 ratings on the US App Store, averaging 4.6 stars. Version 43.00 came out on Nov 1, 2026 and needs iOS 17.0 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, Fortnite is #60 of them.
From its App Store listing:
Play and battle with friends in Fortnite. Be the last player standing in Battle Royale, Zero Build, Blitz and OG, carry your squad to victory in fast-paced Reload, build your own adventures in LEGO® Fortnite, or headline a concert in Fortnite Festival — it's all here. Play thousands of free developer-made islands with your friends, including tycoons, deathruns, zombie survival, and more. DISCLAIME…
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 Fortnite. 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 43.00 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 43.00 · Nov 1, 2026
TREASURE HUNTERS: The Greatest Adventure of All Time Drop into a mysterious new skull-shaped island and join the hunt for legendary treasure. Collect new Sprites, take down powerful bosses, and unleash anime-inspired weapons. The hunt is on.
Questions
Does Fortnite work on iPhone Duo?
It works, but with black bars. Fortnite 43.00 is built with the iOS 26.1 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Fortnite 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 Fortnite 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 Fortnite 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 Fortnite 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 Fortnite within about a day of its release and update this page.
What can I do about the black bars until then?
Use Fortnite 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.