A Claude Code skill for iPhone Duo

Your app,
unfolded.

Panewise teaches Claude Code what it takes to make an iOS app feel at home on iPhone Duo, from the one fix that makes it respond to taps to two-pane layouts and launch-ready mockups.

Buy for $29 See the before and after

One-time purchase · Expo, React Native, SwiftUI, UIKit and Flutter

A coaching app on an unfolded foldable iPhone: the coach's clients on the left half, the selected client's day on the right half.

The proof

Same app. Same screen.
Two first impressions.

Drag to compare. On the left, what iOS shows for an app that hasn’t adopted the Duo. On the right, the same app after the changes in this playbook.

After: the app's home screen using the full unfolded display, with a sidebar on the left. Before: the same home screen as a narrow phone-width column with black space on both sides. BeforeAfter

SPLYT, a workout app in the App Store, shown on the iPhone Duo simulator. The left side recreates compatibility mode from the app’s own iPhone screenshot, laid out exactly as the simulator shows an app that hasn’t adopted the Duo. The right side is an unedited capture of the shipping build.

Why it matters

What goes wrong
on the Duo.

None of these show up in a code review. All of them show up the moment someone unfolds the phone.

01

It ignores taps.

Without the UIKit scene life cycle, the app runs in legacy window mode. On the Duo, our own app’s UI stopped receiving touches entirely, while Apple’s sheets on top still worked.

02

It’s letterboxed.

Build with an SDK older than Xcode 27.1’s and iOS shows your app as a phone-width column, however good your layouts are.

03

It hides under the clock.

Unfolded, the status bar moves to a strip down the side. Cards, pagers and charts sized from the window slide right under it.

04

It’s just bigger.

A phone layout stretched across a screen wider than 600 points wastes the reason people bought the device, and it’s the first thing they notice.

How it works

Four steps.
One skill.

Install the skill, open your project in Claude Code, and ask. Claude follows the playbook in order, shows you each change, and leaves every other device exactly as it was.

1

Audit

A read-only scan finds the blockers and the layout work: missing scene manifest, toolchain, window-width reads that go stale on a fold, iPad-only gates the Duo never passes, and modals that ignore the side strip.

2

Unblock

Adopts the scene life cycle with a drop-in SceneDelegate that keeps your deep links working, and moves your builds to the right Xcode, including your cloud builds.

3

Unfold

Two panes where they earn it: list and detail, plan and current step, roster and client. A sidebar in place of the tab bar. A selection that survives every fold.

4

Show it off

Verifies on the iPhone Duo simulator, folded and unfolded, then turns your screenshots into clean light or dark mockups for the App Store and your launch posts.

› make my app ready for iPhone Duo

What’s inside

Everything we learned
shipping on the Duo.

  • The playbook. What to fix and in what order, with the rules that keep your other devices untouched.
  • Audit script. One command, read-only, with a checklist of blockers first.
  • Scene guide. The manifest, a drop-in SceneDelegate, and the link regressions to test.
  • Layout patterns. Detecting unfolded, the side status strip, two panes, sidebars, and the fold itself.
  • Simulator workflow. Running two Xcodes, the Duo simulator, both displays, and the gotchas.
  • Mockup renderer. Screenshots in, launch images out. No design tool needed.

Works with your stack.

ExpoReact NativeSwiftUIUIKitFlutter

Field-tested on Expo and React Native in a shipping App Store app. The SwiftUI, UIKit and Flutter paths follow each framework’s documented APIs, and the skill tells you where it’s less certain instead of guessing.

Written for Claude Code. It’s plain Markdown and shell, so you can also read it yourself or point another coding agent at it.

Pricing

One price.
Every app you make.

Panewise
$29one-time
  • The complete skill: playbook, references and scripts
  • Use it on every app you and your team build
  • Updates as iOS and the frameworks change
  • Instant download, yours to keep
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Secure checkout by Stripe · Instant download · All sales final

Questions.

What is a Claude Code skill?

A folder of instructions and scripts that Claude Code loads when a task needs it. Unzip it into ~/.claude/skills/, open your project, and ask Claude to make your app ready for iPhone Duo.

Will it change my app on other iPhones or iPad?

No. The playbook’s first rule is that every Duo layout is gated on an unfolded Duo’s width, and its last step checks a regular iPhone and an iPad to confirm nothing outside the Duo moved.

Do I need a new App Store build?

Once. The scene life cycle and the newer Xcode are native changes. After that build is live, layout changes in Expo and React Native can usually ship over the air.

Do I need an iPhone Duo?

No. Everything is verified on the iPhone Duo simulator that ships with Xcode 27.1. The skill walks you through setting it up next to your current Xcode.

Can I get a refund?

Panewise is an instant digital download, so all sales are final and we don’t offer refunds. If something isn’t working, reply to your receipt email and we’ll help you get it running.

Can I share it?

One purchase covers you and your team, on as many apps as you like. Please don’t repost or resell the files.

Is this from Apple or Anthropic?

No. Panewise is an independent product. It isn’t affiliated with, sponsored by, or endorsed by Apple or Anthropic.