AirmailOptimized
Clean, modern design in true Apple style. It's the only one to add a vertical bar on the left, which balances the layout of the cover screen.
Checked by hand on a real iPhone Duo
We open every app on the 7.6" inner screen and tell you how it really looks: whether it uses all the space, only part of it, or stays an iPhone-sized window with black borders.
Best on Duo
Our picks after testing them: what they do best with the Duo open.
Clean, modern design in true Apple style. It's the only one to add a vertical bar on the left, which balances the layout of the cover screen.
Optimized from day one, simple and comfortable.
Optimized since the Duo's launch, very easy to navigate.
We're waiting for Google, because navigation apps on the Duo are a whole different story.
Maybe the best of all and the most innovative, at least for now.
The only banking app already optimized, light and complete.
Most wanted
The not-yet-ready apps with the most votes from visitors. Tap "I want it on Duo" in the list to vote.
How to read the list
Look at the vertical column on the side. Updated apps move their own buttons there; the others leave it to the system, showing just the time and Wi-Fi.
Fills the screen and uses the vertical bar for its own buttons. Also works well in Split View and on the cover screen.
Goes full screen, but the vertical bar stays empty: it only shows the time, Wi-Fi and the rotation button.
Stays in iPhone format with black borders. You can enlarge it, but the layout is still the phone one.
For games the rule is different, since they have no buttons to move into the bar: what matters is how they fill the unfolded screen. Optimized means no black bands, Poorly adapted means stretched or cropped, Not optimized means it stays in iPhone format.
By category
Sorted from the most to the least ready. The bar shows optimized, partial and not optimized apps.
The list
In Split View it fills its half: the navigation bar becomes a vertical column on the right.
New version 9.1.584 released 26 October 2026: re-check pending
Full screen it stays in iPhone format, in landscape and portrait, even when enlarged. In Split View it fills its half but does not use the vertical bar: the column only shows the time, Wi-Fi and the rotation button.
Goes full screen but does not use the vertical bar.
New version 12.38 released 26 October 2026: re-check pending
New version 10.9.0 released 26 October 2026: re-check pending
New version 6.1.1 released 26 October 2026: re-check pending
New version 5.59.0 released 26 October 2026: re-check pending
New version 26.42.0 released 26 October 2026: re-check pending
New version 2.744.11082 released 26 October 2026: re-check pending
Report an app
If you have a Duo, tell us what you see: we check every report on our own Duo before publishing it. If you don't have one yet and are thinking of buying it, ask us to test the app you care about: we'll add it to the queue.
Write the app name and, if you like, why you care about it: we'll add it to the queue, test it on our Duo and add it to the list.