A reading diary with the cover and details either side of the fold, the timer above it
Does BookSafe work on iPhone Duo?
Yes. BookSafe's App Store page says it supports iPhone Duo, so the update is out. FoldHunt's editor hasn't seen it running yet.
- App Store confirmedThe developer, in the release notes for version 1.6 (released October 7, 2026): "Ready for iPhone Duo – BookSafe uses both the outer and the inner display. Unfolded, tiles line up with the fold, in landscape the cover sits left of the fold and the details to the right, and in tabletop mode cover and reading time sit above the fold with the controls below." The description says the same. There are no pictures of it on the Duo yet. The App Store seller is Fabian Grill (id 6779730178).
Adapted for the fold
We're waiting on details of exactly what BookSafe changes for the fold. Are you the developer? Tell us.
About BookSafe
BookSafe keeps your library, wishlist and reading time. Version 1.6 uses both displays of iPhone Duo, the developer says. Open, tiles line up with the fold, and in landscape the book cover sits left of the fold with its details to the right; half open on a table, the cover and reading timer sit above the fold with the controls below. There are no pictures of it on the Duo yet.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· App Store page reviewed
App Store confirmed · iphone-duo
The App Store description mentions iPhone Duo: "ON IPHONE, IPAD, IPHONE DUO AND APPLE WATCH" (version 1.8, released October 17, 2026).
App version: 1.8.
Store text only: we haven't seen the app running, and the store page doesn't show how each pose is used.
View reviewed evidence ↗
Related guides
The best iPhone Duo apps so far (October 2026)
The apps worth installing now that iPhone Duo is on sale, from the apps Apple named as launch partners to indie apps whose developers have shown a real iPhone Duo layout, picked for what they do when you open the phone.
Do your apps work on iPhone Duo? What happens before they're updated
Every iPhone app opens on iPhone Duo, but only updated ones fill the inner display. What an app looks like before its developer adapts it, how to tell which are ready, and which popular apps have said so.
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