See your site on the iPhone Duo.
Paste a web address. You get it rendered at the Duo screen sizes, and the moment someone opens the phone with your page on screen.
What gets checked
- Folded, 466 × 678. The outer screen, held upright. Wider than any earlier iPhone, but short.
- Unfolded, 890 × 626. The inner screen opened flat. Tablet width, phone height.
- Split View, 440 × 626. Half of the inner screen, with two apps side by side.
- The fold itself: the page is resized from folded to unfolded without a reload, the way the phone does it, and compared with a fresh load at the same size.
Free, and nothing is stored beyond the screenshots behind your results link. The Duo ships on 23 October 2026; until then every check is emulated at its screen sizes in a WebKit browser rather than run on real hardware.