Keyboard settings that turn into a sidebar and a page when the Duo opens
Does KeyboardKit work on iPhone Duo?
Yes. KeyboardKit has a layout made for iPhone Duo, and FoldHunt's editor has checked it in the simulator.
- Simulator verifiedDaniel Saidi of Kankoda, in a KeyboardKit blog post with simulator screenshots, closed, half-folded and open (keyboardkit.com). The App Store seller is Kankoda Sweden AB (id 1568444977). The release notes for version 4.8.0 (released October 9, 2026): "This version adds a new split-screen design for the iPhone Duo and the iPad." On October 10, 2026, Daniel posted on X that all of Kankoda's apps are ready for the Duo's launch (@danielsaidi on X).
Adapted for the fold
- Closed · Outer display
A list, as on any iPhone
Closed, the main menu is a list, and tapping an item opens its settings screen on top of it.
- Book · Partly folded
Menu and settings on facing pages
Half-folded like a book, the menu stays open on the left page and the chosen settings screen fills the right one, so nothing sits on the crease.
- Open · Inner display
A narrower sidebar open flat
Open flat, the menu becomes a narrower sidebar and the settings screen gets the rest of the width, closer to the iPad app.
About KeyboardKit
KeyboardKit is Kankoda’s app for setting up a custom keyboard, and it is laid out like the iOS Settings app. In Daniel Saidi’s screenshots on the iPhone Duo simulator, it is a plain list closed. Half-folded, the menu and the chosen settings screen sit on facing pages, one on each side of the fold. Open flat, the menu narrows to a sidebar. Version 4.8.0 ships this split-screen design for the iPhone Duo and the iPad.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· Simulator screenshots reviewed
Simulator verified · iphone-duo
Looked at the three iPhone Duo simulator screenshots in Daniel Saidi's blog post: closed, the main menu as a list, with the cover's camera hole and status ring; half-folded, the phone bent with the menu on the left half and Keyboard Settings on the right; open flat, the menu as a narrower sidebar with the settings screen beside it.
Poses shown: Closed, Book, Open. These are observations of the evidence, not a test of every interaction.
App version: Not recorded in this evidence. Environment: iPhone Duo simulator.
Screenshots with no Xcode version; the post says the redesign is in progress, with the keyboard preview and the keyboard itself still to adapt. No build was tested.
View reviewed evidence ↗
On the ideas wall
All ideas
KeyboardKit: a settings sidebar that gets its own page
by Daniel Saidi
Daniel Saidi's KeyboardKit app, being redesigned for the Duo. Closed, its menu is a plain list. Half-folded like a book, the menu and the chosen settings screen sit on facing pages. Open flat, the menu narrows to a sidebar.
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 on day one, from Apple's four 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: The KeyboardKit app is being redesigned for the iPhone Duo (KeyboardKit blog) (keyboardkit.com) · Daniel Saidi on X (x.com) · KeyboardKit on the App Store (apps.apple.com)
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