Shopping · v3.0.1
Does Koupon work on iPhone Duo?
Not confirmed yet. Koupon runs normally on iPhone Duo's outer display, but there's no reliable report yet of how it looks on the inner display.
At a glance
- Inner display (7.6″)
- Not confirmed yet
- Outer display (5.4″)
- Works normally
- Split View
- Supported
- Every app, automatically
- iPad version
- No
- Phone-only layout today
- Latest version
- v3.0.1
- Sep 2, 2026
- Duo in release notes
- Not yet
On the inner display
iPhone Duo shows each app in one of three ways depending on which SDK it was built with: letterboxed with black bars (iOS 26 or earlier), expanded with some empty space (iOS 27), or full screen (iOS 27.1 and later). We don't yet know which applies here.
Koupon has no iPad version today, so its layout has only ever been designed for phone-sized screens. That doesn't mean it won't adapt — only that its developer is starting from a phone layout rather than an iPad one.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Koupon. 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
No public evidence yet. iPhone Duo ships on October 23, 2026; if you have one, tell us how Koupon looks — a screenshot helps.
Latest release notes
Version 3.0.1 · Sep 2, 2026
- Improved screen transitions on the Home page - Enhanced user platform preference settings - Refined layouts across several pages - Bug fixes and performance improvements
Questions
Does Koupon work on iPhone Duo?
Not confirmed yet. Koupon runs normally on iPhone Duo's outer display, but there's no reliable report yet of how it looks on the inner display.
Does Koupon 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 Koupon 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.
Will Koupon have black bars on iPhone Duo?
It depends on the version of Apple's SDK the current build of Koupon uses: iOS 26 or earlier means black bars, iOS 27 means mostly filled, iOS 27.1 means full screen. We'll update this page as soon as there's evidence.