Shanghai Yuhuan Technology Co., LTD
Photo & Video v4.44.0
Does Kapi相机 work on iPhone Duo?
It works, but with black bars. Kapi相机 4.44.0 is built with the iOS 26.5 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 26.5 SDK
- Version 4.44.0, read Nov 1, 2026
- iPad version
- No
- Phone-only layout today
- Latest version
- v4.44.0
- Oct 30, 2026
- Duo in release notes
- Not yet
About Kapi相机
Kapi相机 is made by Shanghai Yuhuan Technology Co., LTD and first came out on the App Store in January 2022. It's only on the China App Store, where it has 90,897 ratings. Version 4.44.0 came out on Oct 30, 2026 and needs iOS 15.0 or later. It's free to download.
From its App Store listing:
「Kapi相机」是一款让您能拍摄DV、CCD、胶片的应用。您可以用它来记录生活中的美好时刻，享受复古风格的画面质感和氛围感。 • 模拟真实的DV和CCD效果， 让您一秒回到千禧年。 • 握供多种复古风格的滤镜和特效，让您随心所欲地创造不同的视觉效果。 • 支持效果实时预览，让您轻松拍摄自己喜欢的影像。 • 简单易用的操作界面，创作信手拈来。 「Kapi相机」由一个专注于影像模拟技术的小团队精心制作。我们致力于为用户提供真实、优质、有趣的复古效果。未来我们还会推出更多的DV、CCD、胶片效果，帮助您用低成本实现心中所想！ 如果您喜欢复古风格，如果您想要拍出不一样的视频和照片，就快点击下载「Kapi相机」吧！ ---------------------- 使用条款: https://www.apple.com/legal/internet-services/itunes/dev/stdeula…
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 Kapi相机. 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 4.44.0 is built with the iOS 26.5 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 26.5 SDK
Latest release notes
Version 4.44.0 · Oct 30, 2026
AI构图新增专业人像模式，提供构图和姿势引导，轻松拍出好看照片。
Questions
Does Kapi相机 work on iPhone Duo?
It works, but with black bars. Kapi相机 4.44.0 is built with the iOS 26.5 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Kapi相机 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 Kapi相机 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 Kapi相机 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 Kapi相机 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 Kapi相机 within about a day of its release and update this page.
What can I do about the black bars until then?
Use Kapi相机 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.