Cultured Code's to-do app. No iPhone Duo version announced yet.
Does Things 3 work on iPhone Duo?
Not announced yet. Cultured Code hasn't said when Things 3 will get an iPhone Duo layout. It still opens on the Duo, but won't fill the inner display until it's updated.
- Not announcedNo announcement from Cultured Code that we have found, and the current App Store release notes don't mention iPhone Duo.
Until it's updated
What an app does on iPhone Duo before its developer adapts it. Which of the open cases applies to Things 3 depends on the tools its current version was built with, and we haven't seen it on the device.
Closed
On the outer display it looks and works as it does on any iPhone.
Open, built with older tools
An app last built with Xcode 26 sits in an iPhone-shaped window on the inner display, with black borders around it.
Open, built for iOS 27
An app built with the iOS 27 SDK resizes to use more of the inner display, with some space left over.
Open, built for iOS 27.1
Only an app built with the iOS 27.1 SDK reaches the edges of the inner display and moves its bar buttons to the side. Apple calls that “optimized for iPhone Duo”.
About Things 3
Things 3 has no announced version for iPhone Duo. As of October 6, 2026, the current App Store release is version 3.24.2, from September 22, and its release notes don’t mention the Duo. Cultured Code has made no announcement that we have found.
Cultured Code sells Things for iPhone and iPad as separate apps, and the iPad one already has a sidebar beside the list. Whether the iPhone app borrows it for the Duo is Cultured Code’s call, and it hasn’t said. Task apps that have shown a Duo layout include 24me and Aida.
Things 3 will still open on iPhone Duo, like every app on the App Store. Closed, it looks as it does on any iPhone. Open, it won’t reach the edges of the inner display until Cultured Code rebuilds it with Apple’s iOS 27.1 tools, which Apple only cleared for App Store submissions on October 5. More in how apps that aren’t updated run on iPhone Duo.
Know something we don't?
If Cultured Code has announced or shipped a version for iPhone Duo, send us the link and we'll update this page the same day.
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