Apple has published App Store screenshot sizes for the iPhone Duo. There is one size for the outer display and one for the inner display, and neither matches any existing iPhone class. App Store Connect does not take iPhone Duo uploads yet: Apple says support will be available later this year. This page restates Apple's screenshot specifications as of September 26, 2026. For every other iPhone, see the iPhone screenshot sizes guide.
iPhone Duo Screenshot Sizes #
| Display | Portrait (pixels) | Landscape (pixels) |
|---|---|---|
| Outer display | 1398 × 2034 | 2034 × 1398 |
| Inner display | 2007 × 2853 | 2853 × 2007 |
The file rules are the same as for every other slot: 1 to 10 screenshots in PNG or JPEG, with no alpha channel or transparency.
Uploads Are Not Open Yet #
Apple's specification carries a note on the iPhone Duo entry: support for uploading assets for this device in App Store Connect will be available later this year. Until then there is no iPhone Duo slot to put these files in, and neither size is accepted in any other iPhone class.
That means nothing changes for your next submission. The required iPhone set is still one 6.9-inch set at 1320 × 2868, 1290 × 2796 or 1260 × 2736, or a 6.5-inch set if you have no 6.9-inch one.
iPhone Duo Is Not in the 6.9-inch Class #
Apple lists iPhone Duo as its own entry at the top of the iPhone section, separate from the display classes. The 6.9-inch class covers the iPhone Air, 18 Pro Max, 17 Pro Max, 16 Pro Max, 16 Plus, 15 Pro Max, 15 Plus and 14 Pro Max, and its accepted sizes do not include either iPhone Duo size, so an iPhone Duo screenshot will not fill a 6.9-inch slot.
How the Sizes Relate to the Displays #
Apple's iPhone Duo tech specs list two Super Retina XDR displays:
| Display | Diagonal | Resolution | Screenshot size |
|---|---|---|---|
| Outer | 5.4-inch | 1398 × 2034 at 460 ppi | 1398 × 2034 |
| Inner (folding) | 7.6-inch | 1878 × 2670 at 430 ppi | 2007 × 2853 |
The outer screenshot size is the outer display's resolution. The inner one is not: the screenshot size is larger than the inner panel's 1878 × 2670. Build inner-display screenshots at the 2007 × 2853 size Apple lists in the screenshot specification, not at the panel resolution.
Checking Your Files #
The free screenshot validator recognizes both iPhone Duo sizes and flags them as not accepted yet, so you can check a set now and upload it once App Store Connect opens iPhone Duo support. The complete screenshot sizes guide has every other platform.
Frequently Asked Questions #
What is the iPhone Duo screenshot size? 1398 × 2034 pixels for the outer display and 2007 × 2853 for the inner display, in portrait. Landscape is 2034 × 1398 and 2853 × 2007.
Can I upload iPhone Duo screenshots now? No. Apple says support for uploading iPhone Duo assets in App Store Connect will be available later this year.
Is the iPhone Duo part of the 6.9-inch class? No. Apple lists it as a separate entry with its own sizes. The 6.9-inch class remains the required iPhone set.
Do I need iPhone Duo screenshots to submit an app? Not today. There is no iPhone Duo slot in App Store Connect yet, so your submission still depends on the 6.9-inch (or 6.5-inch) set.
Conclusion #
The iPhone Duo sizes are 1398 × 2034 for the outer display and 2007 × 2853 for the inner display. They are published, but uploads open later this year, so ship your 6.9-inch set as usual and prepare the Duo sizes for when App Store Connect is ready. Download Screenshot Studio to export every iPhone class from one design and upload them in a click.