Games v2.3.1
Does Color Slide work on iPhone Duo?
It works, but with black bars. Color Slide 2.3.1 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 2.3.1, read Nov 1, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v2.3.1
- Oct 31, 2026
- Duo in release notes
- Not yet
About Color Slide
Color Slide is made by SayGames LTD and first came out on the App Store in August 2024. It has 59,322 ratings on the US App Store, averaging 4.7 stars. Version 2.3.1 came out on Oct 31, 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, Color Slide is #134 of them.
From its App Store listing:
► Hex-traordinary Fun Looking for a simple yet difficult puzzle that will both help you relax AND train your brain? Color Slide is your one stop shop for all of that and more! Sort and color match hexagons across the playing field, merging colors and making room for more pieces to appear. As you do so your stress will just slip away! ► Hex-cellent Work What might seem simple at first gets progress…
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 Color Slide. 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 2.3.1 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 2.3.1 · Oct 31, 2026
Hey, check this update out: - Some new challenging levels added - Some old bugs fixed And a random fact for you all: The French literally call their own country L'Hexagone because the geographic outline of mainland France roughly resembles a six-sided polygon. The shape is so iconic that it's even stamped on French Euro coins!
Questions
Does Color Slide work on iPhone Duo?
It works, but with black bars. Color Slide 2.3.1 is built with the iOS 26.2 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does Color Slide 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 Color Slide 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 Color Slide 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 Color Slide 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 Color Slide within about a day of its release and update this page.
What can I do about the black bars until then?
Use Color Slide 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.