Games v3.3.0
Does Zenless Zone Zero work on iPhone Duo?
It works, but with black bars. Zenless Zone Zero 3.3.0 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 3.3.0, read Oct 25, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v3.3.0
- Oct 20, 2026
- Duo in release notes
- Not yet
About Zenless Zone Zero
Zenless Zone Zero is made by COGNOSPHERE PTE. LTD. and first came out on the App Store in July 2024. It has 22,438 ratings on the US App Store, averaging 4.1 stars. Version 3.3.0 came out on Oct 20, 2026 and needs iOS 14.0 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, Zenless Zone Zero is #168 of them.
From its App Store listing:
Don't go into Hollows. I know, I know, there are Ether resources in the Hollows, bizarre creations, even ruins of the old civilization — all invaluable treasures. But don't forget about the spatial disorder, the monsters, and mutants running rampant. Ultimately, this is a disaster that could swallow the world. Hollows are not where ordinary people should go. So don't go into Hollows. Or at least, …
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.
Apple said on October 22 that it will be updated for iPhone Duo next month, with controls that adapt to each way of holding the device. Until then, how the current version looks on the inner display is not confirmed.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Zenless Zone Zero. 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.
What the developer has said
Apple said on October 22 that it will be updated for iPhone Duo in November, with controls that adapt to each way of holding the device.
Evidence & history
Press,
Zenless Zone Zero and UnGodly are being demoed on iPhone Duo (Mobilegamer.biz)
Reported as one of the two games demoed on iPhone Duo to press and influencers.
Apple,
iPhone Duo product page (Apple)
Image described as “Zenless Zone Zero app shown on inner display”, opened horizontally, in the A20 Pro section.
Press,
Apple's iPhone Duo is a mobile gaming dream, but it comes at a price (GAMES.GG)
Clip shared by Geoff Keighley shows the game switching between landscape, unfolded and vertical views without closing.
App build,
Version 3.3.0 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 → Full screen — Demoed full screen at Apple’s hands-on event
- : Full screen → Not confirmed yet — Apple says the iPhone Duo version ships later; earlier status came from a pre-release demo
- : Not confirmed yet → Black bars — built with the iOS 26.2 SDK
Latest release notes
Version 3.3.0 · Oct 20, 2026
Version 3.3 "Journey to the Sky" Out Now! Within a sleepwalker's dream... another dreamer awakens. [All-New Characters] • S-Rank Agent Phoenix (Fire - Anomaly) Those in power fear her, but are often taken aback by her frail appearance when she comes to pass judgment. • S-Rank Agent Severian (Wind - Attack) The current senior commissioner of Public Security, and one of the true players at the top of the city's administration. [Returning Characters] • S-Rank Agent Velina (Wind - Anomaly) As the Administrative Director of the ESD, Velina oversees the collaboration between Roscaelifer and New Eridu. • S-Rank Agent Norma (Fire - Stun) Chief Technician of the ESD and a core figure of the Marcel Group. Norma is the leading authority in the Bangboo field. [All-New W-Engines] • S-Rank W-Engine Plume of Rebirth (Anomaly) • S-Rank W-Engine Incarcerating Grip (Attack) [All-New Outfits] • Phoenix: The Illness Called Life • Phoenix: Daydream Complex • Severian: Solemnly Impeccable [All-New Story] • New Main Chapter "Journey to the Sky" Within a sleepwalker's dream... another dreamer awakens. • Agent Trust Events and Quality Time Events New Agent Trust Events and Quality Time Events for Phoenix and Severian. [All-New Events] • All-New Program During the event, log in for a total of 7 days to obtain Encrypted Master Tape ×10! — My new friends, see you on the Exclusive Channel! • "En-Nah" Into Your Lap During the event, log in for a total of 7 days to obtain Boopon ×10! En-nah uhn-
Questions
Does Zenless Zone Zero work on iPhone Duo?
It works, but with black bars. Zenless Zone Zero 3.3.0 is built with the iOS 26.2 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Zenless Zone Zero 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 Zenless Zone Zero 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 Zenless Zone Zero 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 Zenless Zone Zero 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 Zenless Zone Zero within about a day of its release and update this page.
What can I do about the black bars until then?
Use Zenless Zone Zero 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.