A 3D card index for your contacts whose cards tilt with the Duo's hinge angle
Does ScrolloDeck: Retro Contacts work on iPhone Duo?
Yes, from launch day, says its developer: half-folded, the card index spreads across both halves and the cards follow the angle of the fold. It came out on the App Store on October 23, 2026.
- Developer claimedVincent Friedrich, the developer, in a submission to FoldHunt on October 18, 2026, and on the app's site and press kit (neoxapps.de). The app came out on the App Store on October 23, 2026. The App Store description says that as soon as you start folding the Duo, the contact list adjusts to the folding angle.
Adapted for the fold
- Book · Partly folded
Cards that follow the fold
Half-folded like a laptop, the card index spreads across both halves, and the angle of the contact cards follows the angle of the fold.
- Closed · Outer display
The full card index on the cover
Closed, the whole 3D card index fills the cover display.
- Open · Inner display
The full card index, open flat
Open flat, the full 3D card index fills the display.
About ScrolloDeck: Retro Contacts
ScrolloDeck is a 3D recreation of a 1960s-style card index for your contacts. Instead of scrolling a plain list, you flip through index cards that show name, occupation, phone number, address, email and photo, with letter tabs to jump to the right part of the index. It loads your system contacts, so there is no new contact file to set up, and it offers three card fonts, haptic feedback and sound effects.
On the iPhone Duo, the developer says the card index adapts to the fold. Half-folded, it spreads across both halves and the cards follow the angle of the fold as you move it. In the other poses it shows the full 3D card index on the display. The app came out on the App Store on October 23, 2026.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· Developer media reviewed
Developer claimed · iphone-duo
Looked at the developer's site and press kit. Their pictures and demo videos show the card index on a model of the Duo half-folded like a laptop, with a card standing on the upper half and another lying on the lower half, and on the closed Duo's cover. In the videos the cards tilt as the Duo folds and unfolds.
Poses shown: Book, Closed. These are observations of the evidence, not a test of every interaction.
App version: Not recorded in this evidence.
These are renders and animations on a 3D Duo model, not captures from the simulator, and the press kit doesn't say how the screens were made. The open display isn't shown. The app isn't out yet, so no build was tested.
View reviewed evidence ↗
Related guides
iPhone Duo poses: closed, open, book, standing and Split View
A plain-language guide to the ways you will hold iPhone Duo, what the phone itself does in each, and the apps and ideas that make the most of them. For anyone buying one, and for anyone building for it.
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.
Is this your app?
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Sources: ScrolloDeck on the App Store (apps.apple.com) · ScrolloDeck's site (neoxapps.de) · ScrolloDeck press kit (neoxapps.de)
More for iPhone Duo
KeepCount
Tyler Hillsman / 1881 Digital, LLC
A board of tally counters: half-folded, counts sit above the fold and the buttons below
Simulator verified: Tyler Hillsman, the developer, in a submission to FoldHunt on October 17, 2026, with an unframed screenshot of the app in the iPhone Duo simulator in the press kit (keepcount.app). The App Store seller is 1881 Digital, LLC. The release notes for version 1.8 (released October 12, 2026) say KeepCount now adapts to the iPhone Duo's inner and outer displays, with a tabletop layout when it's partly folded.
- Book
- Closed
- Open
Calc Pro - The Best Calculator
Panoramic Software Inc.
Ten calculators and converters, with the tape of results beside the calculator when open
Simulator verified: Panoramic Software Inc., the developer, in a submission to FoldHunt on October 18, 2026, and in the App Store release notes for version 7.0.6 (released October 12, 2026), which describe the closed and open layouts. The app's page on the developer's website has pictures of both on the iPhone Duo.
- Closed
- Open
Sticky Widgets
Tyler Hillsman / 1881 Digital, LLC
Sticky notes as widgets, with a larger library and side-by-side editing on the Duo
Simulator verified: Tyler Hillsman, the developer, in the App Store release notes for version 5.4.0 (released October 13, 2026), which add iPhone Duo support with a larger library and side-by-side editing, and in a submission to FoldHunt on October 17, 2026, with an unframed screenshot of the app in the iPhone Duo simulator in the press kit (stickywidgets.app). The App Store seller is 1881 Digital, LLC; the App Store pictures show ordinary iPhones and iPads.
- Open