A code keyboard with its own layouts for the Duo open, folded like a laptop, and closed
Does TabForge: Code Keyboard work on iPhone Duo?
Yes, and seen in simulator screenshots: open, the keyboard spans the display; folded like a laptop, your code sits above and the keys below; closed, a compact layout fits the cover.
- Simulator verifiedJeremy 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.
Adapted for the fold
- Open · Inner display
The whole keyboard across the open display
Open flat, the keyboard runs the full width of the display: arrows, Ctrl, Option, Command and Esc on top, then indent and outdent beside the brackets, a number row and the letters.
- Book · Partly folded
Folded like a laptop
Stand the Duo half-folded like a laptop and the keyboard moves to the lower half, under your code. This layout adds a row with Esc, indent, outdent, Home, End and a key that deletes the line.
- Closed · Outer display
A compact layout on the cover
Closed, a narrower layout keeps the arrows, modifier keys, brackets and numbers above the letters on the cover.
About TabForge: Code Keyboard
TabForge is an open-source keyboard for writing code on iPhone and iPad. It keeps braces, brackets, the full set of ASCII punctuation, Tab and indent controls, arrows, Escape, and Control, Option and Command beside the letter keys, with saved snippets and suggestions for Swift, Python, JavaScript, TypeScript, Shell and JSON. Input profiles for code editors, terminals and remote desktops change how it types, and the companion app has a playground editor and voice to code. It’s free and MIT-licensed, doesn’t ask for Full Access, and has no ads, analytics or accounts; an optional Tip Jar supports it.
On the iPhone Duo it has three layouts of its own, which need iOS 27.1. Open flat, the keyboard spans the whole display. Fold the phone like a laptop and the keyboard moves to the lower half, under your code, with an extra row for Esc, indenting, Home and End. Closed, a compact layout fits the cover. Jeremy Collins, who also made Paper & Grain, shows all three in simulator screenshots on the app’s page.
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 screenshots on the developer's TabForge page, captured in the simulator's device frame with the Duo status ring: open flat, the companion app's Playground above a full-width code keyboard; half-folded like a laptop, the code on the upper half and a keyboard with an extra Esc, Home and End row below; closed, a compact layout on the cover beside the camera. The 15-second overview shows the cover opening into laptop mode.
Poses shown: Open, Book, Closed. These are observations of the evidence, not a test of every interaction.
App version: Not recorded in this evidence. Environment: iPhone Duo simulator.
The media come from the developer's site, not the submission, and give no app or Xcode version. They show typing in the companion app's Playground, not in other apps. 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 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?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
<a href="https://foldhunt.com/apps/tabforge/"><img src="https://foldhunt.com/badges/featured-on-foldhunt.svg" alt="Featured on FoldHunt" width="220" height="54"></a>Need to update the listing? Email the editor.
Sources: TabForge: Code Keyboard on the App Store (apps.apple.com) · TabForge on Jeremy Collins's site, with iPhone Duo screenshots and an overview video (jeremycollins.net) · TabForge source code on GitHub (github.com)
More for iPhone Duo
Docker Manager GUI - WhaleDeck
Florian Seida
Your Docker servers in a sidebar beside their containers, with a terminal alongside
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.
- Open
- Split View
- Closed
Buildhorn: CI/CD Alerts
Darryl Bayliss
CI build alerts, your repositories on the cover and a repo's build status beside them open
Simulator verified: Darryl Bayliss, the developer, in a submission to FoldHunt on October 23, 2026, and in a Bluesky post on September 20 with a recording of Buildhorn in the iPhone Duo simulator (bsky.app). The App Store seller is Daz Software Ltd. The release notes for version 1.1.1 (released October 18, 2026) say the store listing was updated "to show off how Buildhorn looks on the upcoming iPhone Duo"; they don't describe a layout.
- Closed
- Open
Vibe42
Shanghai Huofeng Technology Co., Ltd.
Remote coding terminals on the cover, and one on each half when half-folded
Simulator verified: Jiacheng (@jiacheng_ai), creator of Vibe42, posted three Duo simulator screenshots and says Duo adaptation is done (@jiacheng_ai on X). The App Store seller is Shanghai Huofeng Technology Co., Ltd. (id6792229966); the current version, 0.12.0 (released October 20, 2026), has release notes that don't mention the Duo.
- Closed
- Book
- Open