Social Networking v585.0.0
Does Messenger work on iPhone Duo?
Mostly. Messenger 585.0.0 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
At a glance
- Inner display (7.6″)
- Partly adapted
- Outer display (5.4″)
- Works normally
- Built with
- iOS 27.0 SDK
- Version 585.0.0, read Oct 29, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v585.0.0
- Oct 27, 2026
- Duo in release notes
- Not yet
About Messenger
Messenger is made by Meta Platforms, Inc. and first came out on the App Store in August 2011. It has 13,946,606 ratings on the US App Store, averaging 4.7 stars. Version 585.0.0 came out on Oct 27, 2026 and needs iOS 15.1 or later. It's free to download. Among the 22 social apps we track on the US App Store, 11 already fill the inner display, 4 are partly adapted and 7 still show black bars. By number of ratings, Messenger is #5 of them.
From its App Store listing:
Messenger is a free messaging app that helps you connect with anyone, anywhere. Stay in touch with your friends and family, explore your interests with people like you, build your community, and share your vibe beyond words, all in one app. CHAT AND CALL ANYONE, ANYWHERE Find and connect with your friends and family on Facebook and Messenger, no phone number needed. GET INSTANT ANSWERS FROM YOUR A…
On the inner display
Built with the iOS 27 SDK, the app extends across most of the inner display, but some areas stay empty. It's usable, just not polished.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including Messenger. 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 585.0.0 is built with the iOS 27.0 SDK
Apple gives apps built with the iOS 27.0 SDK more of the inner display, with some space left over.
- : Not confirmed yet → Partly adapted — built with the iOS 27.0 SDK
Latest release notes
Version 585.0.0 · Oct 27, 2026
We update our app regularly to make it even better for you to easily connect to the people that matter. Update to the latest version to get all the new features and improvements. This release includes: - Fixes for crashes within messaging experiences - Performance improvements to remove latency in some of our core experiences - iOS 26 support Have a question? Tap Help in the Messenger app or visit [facebook.com/help/messenger-app]
Questions
Does Messenger work on iPhone Duo?
Mostly. Messenger 585.0.0 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Does Messenger 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 Messenger 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 Messenger 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 Messenger 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 Messenger within about a day of its release and update this page.
What can I do about the black bars until then?
Use Messenger 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.