Finance v11.9.0
Does 邮储银行 work on iPhone Duo?
It works, but with black bars. 邮储银行 11.9.0 is built with the iOS 26.2 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 26.2 SDK
- Version 11.9.0, read Oct 25, 2026
- iPad version
- No
- Phone-only layout today
- Latest version
- v11.9.0
- Sep 22, 2026
- Duo in release notes
- Not yet
About 邮储银行
邮储银行 is made by 中国邮政储蓄银行 and first came out on the App Store in January 2012. It has 2,061 ratings on the US App Store, averaging 4.6 stars. Version 11.9.0 came out on Sep 22, 2026 and needs iOS 13.0 or later. It's free to download.
From its App Store listing:
本产品是中国邮政储蓄银行为iPhone用户打造的手机银行。客户通过手机银行可办理账户查询及管理、转账汇款、贷款、信用卡、投资理财、缴费、支付等业务，保证客户足不出户即可享受7*24小时的金融服务。 客户服务热线:95580 信用卡客户服务热线:40088-95580
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 邮储银行. 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 11.9.0 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 11.9.0 · Sep 22, 2026
1.优化隐私政策弹窗。 2.完善其他功能细节。
Questions
Does 邮储银行 work on iPhone Duo?
It works, but with black bars. 邮储银行 11.9.0 is built with the iOS 26.2 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does 邮储银行 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 邮储银行 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 邮储银行 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 邮储银行 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 邮储银行 within about a day of its release and update this page.
What can I do about the black bars until then?
Use 邮储银行 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.