Beijing Zhizhetianxia Technology Co., Ltd.
Social Networking v11.14.0
Does Zhihu work on iPhone Duo?
It works, but with black bars. Zhihu hasn't been updated for iPhone Duo's inner display yet, so it runs in a phone-sized window.
At a glance
- Inner display (7.6″)
- Black bars
- Outer display (5.4″)
- Works normally
- Built with
- Not read yet
- We read each app's build SDK after it updates
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v11.14.0
- Nov 4, 2026
- Duo in release notes
- Not yet
About Zhihu
Zhihu is made by Beijing Zhizhetianxia Technology Co., Ltd. and first came out on the App Store in September 2011. It has 26,288 ratings on the US App Store, averaging 4.5 stars. Version 11.14.0 came out on Nov 4, 2026 and needs iOS 13.0 or later. It's free to download.
From its App Store listing:
有问题，就会有答案。 在知乎，和更多认真思考、真诚分享的人一起，发现更大的世界。 • 发现答案 越复杂的问题，越值得被认真回答。这里汇集了源于真实经历、专业背景和长期观察的回答。 • 参与讨论 在知乎，热点不止一种声音。你可以看到更丰富、更理性、更多元的视角，也可以留下自己的判断。 • 获得经验 从职场进阶、考研留学，到数码评测、家居装修，进入AI时代，无数过来人的经验和真诚分享更为可贵。 • 遇见同好 好问题惺惺相惜。在知乎，你总能找到同样爱思考、气场对的人，建立更同频的链接。 • AI 看山 AI 正在悄然融入社区——搜索、阅读、追问、创作，「AI看山」都在你身边，总结长文、提炼重点、拓展边界，也为创作激发灵感，越来越懂你。 如有任何问题或建议，可发送邮件至 app@zhihu.com，知乎的工程师不会漏掉任何一条反馈哦 ~
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 Zhihu. 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 11.13.0 is built with the iOS 26.2 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 26.2 SDK
Latest release notes
Version 11.14.0 · Nov 4, 2026
修复了一些问题，优化了使用体验。
Questions
Does Zhihu work on iPhone Duo?
It works, but with black bars. Zhihu hasn't been updated for iPhone Duo's inner display yet, so it runs in a phone-sized window.
Does Zhihu 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 Zhihu 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 Zhihu 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 Zhihu 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 Zhihu within about a day of its release and update this page.
What can I do about the black bars until then?
Use Zhihu 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.