iPhone Duo Apps“Compatible” can hide several different claims. An app that installs is not necessarily adapted to the new display, and a polished demonstration is not evidence that every workflow works. Our directory records the strength of the available evidence.
Four useful levels of evidence
- Watchlisted. An existing app has a relevant workflow. Duo-specific support remains unverified.
- Announced. Apple or the developer has made a specific public claim. The record names the source, date, and scope.
- Environment checked. A workflow has been exercised in a named simulator or preview with a recorded app build and OS. It remains distinct from a device check.
- Device tested. A reproducible workflow has been tested on named physical hardware, with versions, test steps, evidence, and known limitations.
These are our editorial categories, not Apple certifications. A result applies to the tested workflow and version. An update can change the result.
What to ask an app developer
Ask for the shipping version, the exact behavior being claimed, the environment used, and a short demonstration. A useful answer describes what happens to an in-progress task when the layout changes. An honest limitations list is more informative than a blanket “fully optimized” badge.
How we handle commercial relationships
Editorial consideration is free. Paying for our development services does not buy a compatibility verdict. Sponsored placements, if introduced, will be visibly labeled and kept separate from evidence status. Current directory links are ordinary source links and do not earn us commissions.
How to request a correction
Email hello@iphoneduoapps.com with the page, app version, claim, and a public source or reproduction steps. We assess the evidence and update the record when warranted.
For current launch examples, see Apple’s September 9 release. For the entries this site currently tracks, see the app watchlist.