A diary of your apps' milestones, with the iPad layout when the Duo is open
Does AppJournal - Indie App Diary work on iPhone Duo?
Yes, the developer says so: since version 2.4, the open Duo uses the iPad layout, with columns for your apps, log entries and ideas.
- App Store confirmedAdam Foot, the developer, in the App Store release notes for version 2.4: open, the Duo shows several columns, and the toolbars are adjusted. In an email to FoldHunt, Adam said the open Duo uses the iPad layout.
Adapted for the fold
- Open · Inner display
The iPad layout
Open, AppJournal uses its iPad layout, with columns for moving quickly between your apps, log entries and app ideas.
About AppJournal - Indie App Diary
AppJournal is for indie iOS developers: a place to keep each app’s milestones, release dates, price changes and more, along with ideas for new apps.
Version 2.4 adds iPhone Duo support. Open, it switches to the iPad layout, with columns that make it quick to move between your apps, their log entries and your app ideas.
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 release notes for version 2.4.2 (released October 21, 2026) mention iPhone Duo: "In this update: - Added full support for iPhone Duo providing you with multiple columns when unfolded."
App version: 2.4.2.
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 ↗· Developer statement reviewed
Developer claimed · iphone-duo
The open Duo shows several columns, with adjusted toolbars.
App version: 2.4.
The developer's written claim only. No pictures or video of the app on the Duo were checked, and no build was tested.
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.
Is this your app?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
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Sources: AppJournal - Indie App Diary on the App Store (apps.apple.com)
More for iPhone Duo
TabForge: Code Keyboard
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A code keyboard with its own layouts for the Duo open, folded like a laptop, and closed
Simulator verified: Jeremy Collins, the developer, in a submission to FoldHunt on October 21, 2026, describing separate layouts for the Duo open, in tabletop and closed. The TabForge page on the developer's site has screenshots of all three in the iPhone Duo simulator and a 15-second overview of the Duo opening into laptop mode. The App Store description says supported Duo layouts show more controls and need iOS 27.1. The release notes for version 1.0.1 (released October 21, 2026) add a Tip Jar and don't mention the Duo.
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Simulator verified: Florian Seida, the developer, in a submission to FoldHunt on October 21, 2026, with a recording of the app in the iPhone Duo simulator in a post on X the same day saying WhaleDeck now supports iPhone Duo, along with a built-in terminal and faster loading. The release notes for version 3.4.0 (released October 21, 2026) list the terminal and the speed-ups but don't mention the Duo.
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SSH terminal for AI coding agents in Tmux, edge to edge open and centred on the cover
Simulator verified: Daniel Bilsborough, the developer, in a submission to FoldHunt on October 28, 2026, and on Shell Drop's iPhone Duo page, with captures from the simulator. The App Store seller is Daniel Bilsborough. The App Store release notes for version 5.2.2 (released October 28, 2026) say: "Fully optimised for iPhone Duo, folded or open. The terminal sizes itself to the screen, and every screen stays clear of the status bar."
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