By
iPhone Duo Screen Tester
See Your Website on the iPhone Duo
Preview any site on the 5.4-inch cover display and the 7.6-inch inner display, side by side.
Outer display
Enter a URL below to preview a site.
Inner display
Enter a URL below to preview a site.
Both screens are live. Scroll and click each one just like the real site.
Outer · Closed
5.4-inch Super Retina XDR · 1398 × 2034 at 460 ppi
Inner · Unfolded
7.6-inch folding OLED · 1878 × 2670 at 430 ppi
Why Foldable Responsiveness Matters
The iPhone Duo has two screens with different dimensions, and visitors switch between them constantly. A site built on rigid, fixed-width layouts can look broken the moment someone unfolds their phone mid-scroll. A site built to scale proportionally holds up on both.
This tool lets you check both states before your customers do. For the full breakdown, read our guide on designing for the iPhone Duo.