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Apple’s iPhone Duo Launches With Strong Hardware but App Compatibility Gaps

Early reviews show top-tier hinge and display engineering raising market hopes if apps and iOS updates catch up.

Overview

  • Reviewers published hands-on tests on Wednesday that praised the Duo’s 7.6-inch inner display, matte multi-layer screen and tight titanium hinge while flagging weight and the lack of Face ID.
  • Many older apps display black bars or restricted windows on the Duo’s 7.6‑inch inner and 5.4‑inch outer screens, creating visible layout glitches that require developer updates to fix.
  • Apple told testers it plans software fixes this year, including an expanded one-handed Reachability mode and Apple Pencil USB‑C support, with iOS 27.1 and 27.2 named as likely delivery points.
  • The Duo uses the A20‑Pro chip and dual 48MP sensors but omits a dedicated telephoto lens and relies on a 2x optical-quality crop before digital zoom, and it uses a side‑mounted Touch ID sensor for unlocking.
  • The iPhone Duo starts at €2,299 and tops out at €3,799 for 2 TB, positioning Apple above rival foldables and forcing buyers to weigh the premium price against early app limitations and promised software fixes.