Does SERIES work on the iPhone Duo?
Last updated
Not yet. iPhone Duo support for SERIES has been announced, but it isn't available to test or grade yet.
Books on a larger display.
How iPhone Duo grades work
Each app is graded on how it handles the foldable: filling the 7.6-inch inner display, dual-pane layouts, drag and drop across the fold, and keeping its place when you fold or unfold. The grade out of 10 sums it up. Grades come from a hands-on test where there has been one, and otherwise from what Apple and the developer have announced; every app page says which. New to the iPhone Duo? How iPhone Duo app compatibility works.
8 and up
Most compatible
Built for the foldable: fills the inner display and handles folding well.
4 to 7.9
Half experience
Works, but doesn’t make full use of the inner display.
Below 4
Not compatible
Runs like a regular iPhone app, or has trouble when you fold or unfold.
Source: Apple Newsroom, Oct 22 2026
