BUILDING-BLOCKS NETWORK TECHNOLOGY CO.,LIMITED
Games v1.41.01
Does Z Route work on iPhone Duo?
It works, but with black bars. Z Route 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
- v1.41.01
- Nov 4, 2026
- Duo in release notes
- Not yet
About Z Route
Z Route is made by BUILDING-BLOCKS NETWORK TECHNOLOGY CO.,LIMITED and first came out on the App Store in May 2026. It's #80 on today's US App Store top charts. It has 14,859 ratings on the US App Store, averaging 4.7 stars. Version 1.41.01 came out on Nov 4, 2026 and needs iOS 15.0 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, Z Route is #181 of them.
From its App Store listing:
The world has turned to ash, dominated by zombies. Z Route—it is your final path to redemption, and the last battleground of the apocalypse. With nowhere to hide, you can only advance, weapon ready! Redemption or doom? The choice is in your hands! Crash through every gate of choice and tear through the horde amid roaring engines. Only speed and ruthlessness will keep you alive. Are you ready? T…
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 Z Route. 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 1.40.05 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 1.41.01 · Nov 4, 2026
New Version.
Questions
Does Z Route work on iPhone Duo?
It works, but with black bars. Z Route hasn't been updated for iPhone Duo's inner display yet, so it runs in a phone-sized window.
Does Z Route 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 Z Route 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 Z Route 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 Z Route 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 Z Route within about a day of its release and update this page.
What can I do about the black bars until then?
Use Z Route 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.