iPhone Duo · on sale October 23

Which apps work on iPhone Duo?Fine folded.But unfolded?

Check how the apps you use run on iPhone Duo — folded, unfolded and half-open. Built from App Store build data and reports from real owners.

342apps tracked

81%updated since Duo builds opened

66still letterboxed

0owner reports

Where the top apps stand

The 100 most downloaded apps, plus the top grossing ones. Left half: folded. Right half: unfolded.

01
The build date
Only apps rebuilt with the iOS 27.1 SDK can use the inner display. Apple opened those builds on October 5, so any version released before that is letterboxed.
02
The release notes
We read every new version of every tracked app, every three hours, and flag release notes that mention Duo or foldable support.
03
Owners like you
Three or more matching reports from Duo owners override everything else. Reports reset when the app ships a new version.

Built for Duo: Uses the whole inner display with a layout made for it.
Stretched: Fills the screen, but with a stretched iPhone layout.
Letterboxed: Opens in a smaller window with empty space around it.
Broken: Crashes, freezes or is unusable.
Updated, unconfirmed: Rebuilt for Duo, but nobody has reported how it looks yet.

Apps owners are waiting on. Tap "I want this" on any app page to add your vote.

No votes yet. Open any app that looks wrong on your Duo and tap "I want this" to put it on the board.