Books apps for iPhone Duo

Bible reader in vertical text that opens into a right-bound book spread.

Developer claimed: Jihoon Suh, on the Vertically Verse iPhone Duo page (vertically.works), with captures from the Xcode 27.1 simulator. The App Store seller is Jihoon Suh.

Audiobook player whose reader shows two facing pages on the open Duo

Developer claimed: Donovan Montoya, the developer, merged Duo support into the app's public code (github.com) and later crease fixes with Duo simulator screenshots of the reader (github.com); the changelog lists it for the planned version 1.3.0. The current App Store version, 1.2.6, does not mention the Duo.

Ebooks read as a two-page spread, one page either side of the crease

Developer claimed: The developer, Zen Chan, in a post on X showing the reader adapted for the Duo in the simulator (@7enChan on X). The App Store release notes for version 1.4.6 say it is "prepared for iPhone Duo".

Your book and a reading timer on the cover, a two-page spread inside

Developer claimed: The developer's account, @actuallyreadapp, posted a video of Actually Read on iPhone Duo (@actuallyreadapp on X). The App Store page doesn't mention the Duo yet.

Pick a book off the shelf on the cover, read it across the inner screen

Developer claimed: Weera Vera, credited on biblio.ink as Biblio's builder, in a reply on X to a call for day-one iPhone Duo apps, with the same promo video (@PHz on X). It was first posted by @0xDBC, an account that shares groov creator limited's apps (@0xDBC on X). The App Store page does not mention the Duo yet.

PDF reader that lays a book's spread across the fold, binding on the hinge.

Developer claimed: Satoshi Kojima, the developer, on the shelff site (skoji.dev), with pictures from the iOS 27.1 beta simulator. Duo support comes in version 1.8, which Satoshi plans to release before the Duo goes on sale on October 23.