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Games v2.129.0
Does 命运-冠位指定（Fate/Grand Order） work on iPhone Duo?
It works, but with black bars. 命运-冠位指定（Fate/Grand Order） 2.129.0 is built with the iOS 26.4 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 26.4 SDK
- Version 2.129.0, read Oct 24, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v2.129.0
- Jul 23, 2026
- Duo in release notes
- Not yet
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 命运-冠位指定（Fate/Grand Order）. 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 2.129.0 is built with the iOS 26.4 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 26.4 SDK
Latest release notes
Version 2.129.0 · Jul 23, 2026
1、在大成功·极大成功时，不会消耗超出等级上限部分的强化素材。 2、在强化概念礼装时，新增了可以一键选择「推荐素材」的功能。 3、对从者及概念礼装的部分强化功能进行了调整。 4、牵绊获得量提升效果的上限提升，从原来的300%提高至500% 5、对6位从者的战斗动作及宝具演出进行了更新。 ①安妮·伯妮＆玛莉·瑞德(Rider) ②库·丘林〔Prototype〕 ③大流士三世 ④威廉·莎士比亚 ⑤夏尔·亨利·桑松 ⑥玛塔·哈丽 6、助战系统追加EX职阶助战的二级筛选功能。 7、二级密码功能追加短信验证码自助重置功能。 8、部分文本优化。
Questions
Does 命运-冠位指定（Fate/Grand Order） work on iPhone Duo?
It works, but with black bars. 命运-冠位指定（Fate/Grand Order） 2.129.0 is built with the iOS 26.4 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does 命运-冠位指定（Fate/Grand Order） 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 命运-冠位指定（Fate/Grand Order） 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 命运-冠位指定（Fate/Grand Order） 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 命运-冠位指定（Fate/Grand Order） 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 命运-冠位指定（Fate/Grand Order） within about a day of its release and update this page.
What can I do about the black bars until then?
Use 命运-冠位指定（Fate/Grand Order） 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.