iPhone Duo App Store Screenshot Sizes & Requirements
Official iPhone Duo App Store screenshot sizes for the outer and inner displays, plus JPEG/PNG rules, the 1–10 count, and when App Store Connect will accept uploads.
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Quick answer
Capture iPhone Duo App Store screenshots at Apple’s published pixels — outer display 1398 × 2034 px and 2034 × 1398 px, inner display 2007 × 2853 px and 2853 × 2007 px — as 1 to 10 .jpeg, .jpg, or .png files with no alpha or transparency. App Store Connect upload support for Duo arrives later this year (2026); prepare assets now.
Official sizes
Apple’s App Store Connect screenshot specifications list a dedicated iPhone Duo row with exact outer-display and inner-display sizes. Use those pixels as captured — one set for the cover (outer) display, another for the unfolded (inner) display.
| Display | Orientation | Size |
|---|---|---|
| Outer display | Portrait | 1398 × 2034 px |
| Outer display | Landscape | 2034 × 1398 px |
| Inner display | Portrait | 2007 × 2853 px |
| Inner display | Landscape | 2853 × 2007 px |
The same official row notes that support for uploading assets for this device in App Store Connect will be available later this year.
Common mistake
Stretching an existing iPhone 6.9" or 6.3" screenshot to Duo pixels, or assuming you can upload those files today. Outer and inner displays are different resolutions — capture each surface at the exact sizes above. Upload support is not live yet.
Formats and count
The same screenshot specifications page applies these rules to every device size, including iPhone Duo:
- 1 to 10 screenshots
.jpeg,.jpg, and.png- Images can’t include alpha channels or transparencies
App Preview
App Store Connect release notes state that the app preview and screenshot specifications for iPhone Duo have been added. Screenshot pixel sizes are published on the screenshot specifications page now. This page does not invent App Preview video pixel sizes — check Apple’s current App Preview specifications page for the live video dimensions.
Upload timing
Prepare outer and inner assets now so you can drop them in when the iPhone Duo well appears. Apple’s wording on both the screenshot specifications page and the App Store Connect release notes is the same: support for uploading assets for iPhone Duo will be available later this year. Treat that as later in 2026 — not as an upload button you can use today.
Simulator and design tooling still matter while you wait. Download current Xcode from the Apple Developer downloads page and keep the Get ready for iPhone Duo hub open for official updates.
Screenshots do not make the app Duo-ready
Marketing pixels are not a compatibility pass. An app is Duo-ready when it layouts on both displays, handles fold and pose, and survives Split View — work you verify in Xcode, not in a PNG export. Start with How to Test Your App on iPhone Duo with Xcode 27.1 and the compatibility checklist. Design guidance lives in Apple’s Designing for iPhone Duo HIG.
Frequently asked questions
What are the official iPhone Duo App Store screenshot sizes?
Apple lists four exact pixel sizes: outer display 1398 × 2034 px and 2034 × 1398 px, and inner display 2007 × 2853 px and 2853 × 2007 px. Capture each surface at those pixels — do not stretch a single-display iPhone screenshot.
Can I upload iPhone Duo screenshots to App Store Connect today?
No. Apple’s screenshot specifications and App Store Connect release notes both say support for uploading assets for iPhone Duo will be available later this year. Prepare the files now and upload when that well appears.
What file formats and how many screenshots does Apple allow?
You can upload 1 to 10 screenshots in .jpeg, .jpg, and .png. Images can’t include alpha channels or transparencies.
Did Apple add App Preview specifications for iPhone Duo?
Yes. App Store Connect release notes say the app preview and screenshot specifications for iPhone Duo have been added. Screenshot pixel sizes are on the screenshot specifications page; check Apple’s current App Preview specifications page for video dimensions instead of inventing numbers.
Do App Store screenshots make an app Duo-ready?
No. Marketing assets do not replace layout, fold, and dual-display work. Test in the Duo Simulator and run the compatibility checklist before you call the app ready.