Games v1.0.7
Does Resident Evil 4 work on iPhone Duo?
It works, but with black bars. Resident Evil 4 1.0.7 is built with the iOS 18.1 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 18.1 SDK
- Version 1.0.7, read Oct 25, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v1.0.7
- Feb 27, 2026
- Duo in release notes
- Not yet
About Resident Evil 4
Resident Evil 4 is made by CAPCOM and first came out on the App Store in December 2023. It has 2,112 ratings on the US App Store, averaging 3.9 stars. Version 1.0.7 came out on Feb 27, 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, Resident Evil 4 is #210 of them.
From its App Store listing:
Survival is just the beginning. Six years have passed since the biological disaster in Raccoon City. Agent Leon S. Kennedy, one of the survivors of the incident, has been sent to rescue the president's kidnapped daughter. He tracks her to a secluded European village, where there is something terribly wrong with the locals. And the curtain rises on this story of daring rescue and grueling horror wh…
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 Resident Evil 4. 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 1.0.7 is built with the iOS 18.1 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 18.1 SDK
Latest release notes
Version 1.0.7 · Feb 27, 2026
・Fixed certain bugs and issues
Questions
Does Resident Evil 4 work on iPhone Duo?
It works, but with black bars. Resident Evil 4 1.0.7 is built with the iOS 18.1 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Resident Evil 4 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 Resident Evil 4 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 Resident Evil 4 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 Resident Evil 4 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 Resident Evil 4 within about a day of its release and update this page.
What can I do about the black bars until then?
Use Resident Evil 4 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.