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For developers

Ready for the fold? Let people know.

iPhone Duo buyers check their apps before spending $1,999. Be on the list of apps that are ready.

Submit your appGet a badge

  1. 1

    Mention iPhone Duo in your release notes

    We scan the release notes of every tracked app daily. A clear line such as “Now optimized for iPhone Duo” flags your app for review automatically.

  2. 2

    Or tell us directly

    Send a link to your update, blog post or announcement. If your app isn’t tracked yet, we’ll add it.

  3. 3

    We verify and list it

    A person checks the evidence and updates your page — usually within a day. You get a status history and a permanent, linkable page.

  4. 4

    Add your badge

    Embed a live badge on your site or README. It links to your evidence page and updates on its own.

What counts as “Built for Duo”?

Full screen on the inner display, plus something designed for the device: an adaptive multi-pane layout, side toolbars, fold-aware behaviour, or outer-display content via CameraCaptureAccessory. Full screen alone is listed as “Full screen”.

Full methodology

Still on the black bars?

Our short guide covers the SDK tiers, size classes, reserved regions and the new containers — the order of work that removes letterboxing fastest.

Preparing your app for iPhone Duo

Something wrong on your app’s page?

Email hello@worksonduo.com from your company domain, or use the developer option on the submit form. We respond to corrections within 48 hours. Listings are never paid and sponsorship never affects a status.