Does my app really have this problem?

If its current version shipped before October 5, 2026, almost certainly. Apple only began accepting iOS 27.1 builds that day. Send the link and we’ll confirm.

We don’t have a Duo. Does it still matter?

Your customers will. And from April 2027 the rebuild is required for any App Store update, Duo users or not.

Our app is React Native or Flutter.

Same problem, same fix. The iOS build still has to be produced with the new SDK, and the layouts still have to adapt.

Do you need our source code?

Yes. A refit without source isn’t possible. We work from your repository and hand everything back.

Our original developer is gone.

That describes most of the apps we see. We recover the project, bring the build up to date and document it so you’re not stuck again.

iPhone Duo refit

Get your app Duo ready.

Apps built before the iOS 27.1 SDK open in a small box on the Duo’s inner display. We rebuild, test and resubmit yours for a fixed price, in five business days.

Check my app

What the Duo does to your app

iPhone Duo shipped on October 23, 2026 with a 7.6-inch inner display. Apps built with an older SDK don’t fill it. They run centred in black space, and on a $1,999 phone that is hard to miss.

How Apple treats each build

Built with the iOS 26 SDK or earlier: letterboxed, a small window with empty space around it.
Built with the iOS 27 SDK: fills most of the display but stops short of the edges.
Built with the iOS 27.1 SDK: edge to edge, with layouts that adapt as the phone folds.

The badge

Submit Duo screenshots and Apple adds an “optimized for iPhone Duo” badge to your App Store page. Apps without it now sit beside competitors that have it.

The deadline

From April 2027, App Store Connect requires the iOS 27 SDK and iPhone Duo screenshots on every new app and every update. After that, an app that hasn’t been rebuilt can’t ship so much as a bug fix.

Apps built with the iOS 26 SDK or earlier run on iPhone Duo, but won’t adapt to all layouts. When the device is open, your app will appear in the center of the display, with empty space surrounding the window.
Apple Developer, “Three steps to make your app shine on iPhone Duo”

Three fixed prices

Every tier is a fixed price with a fixed turnaround, done by the two senior engineers you talk to. If your app still doesn’t fill the inner display when we’re done, you pay nothing.

Duo Ready — $1,500 — 5 business days

For apps that work fine and just need to fill the screen.

Rebuild on Xcode 27.1 and the iOS 27.1 SDK
Fix build and deprecation breaks
Remove the layout assumptions that cause letterboxing
Test all six Duo states: outer, inner and half-open, in portrait and landscape
Duo screenshots and App Store submission

Duo Adapted — $4,500 — 2 weeks

For apps whose layouts break on the near-square display.

Everything in Duo Ready
Size classes instead of orientation checks
Safe areas and the right-edge status bar
Sheets, tab bar and navigation fixed for the inner display
State preserved when the phone folds mid-task
QA on a physical iPhone Duo

Duo Redesigned — from $9,000 — 3 to 4 weeks

For apps that should feel built for the fold.

Everything in Duo Adapted
A two-pane layout for your key flow: list and detail, menu and order, map and list
Split View support
Screenshots and App Store copy that sell the Duo version

Fill the screen or it’s free. Prices are for one iOS app with source access. Multi-app and agency pricing on request.

How we compare

Market figures as of October 2026. Budget services rebuild your app against the new SDK and stop there. Agencies bill by the hour and route the work through a team.

Price, timeline and scope for an iPhone Duo refit, by type of provider
	Budget rebuild services	Typical agency	MATRIXBUNNY
Price	$299 to $999	$150 to $250 per hour, usually $5,000 to $20,000	$1,500 to $9,000, fixed
Turnaround	About 3 days	2 to 6 weeks	5 business days to 4 weeks
Who does the work	A freelancer or a script	An account manager, then a team	Two senior engineers, start to finish
Testing	Simulator smoke test	Varies	All six fold states
Screenshots and submission	Sometimes	Scoped per project	Included
Guarantee	Sometimes	Rarely	Fill the screen or free

How it works

Four steps, one point of contact, no surprises.

Send your App Store link
We check how your app is built and reply within one business day with the tier it needs and a fixed quote.
Give us access
Source code and App Store Connect access, under NDA if you like. Nothing changes in your account without your approval.
We rebuild and test
Rebuilt on the iOS 27.1 SDK and tested in every fold state. You get a build to try before anything ships.
We submit
Duo screenshots, release notes and the App Store submission, handled. You approve the release.

Questions

Does my app really have this problem?: If its current version shipped before October 5, 2026, almost certainly. Apple only began accepting iOS 27.1 builds that day. Send the link and we’ll confirm.
We don’t have a Duo. Does it still matter?: Your customers will. And from April 2027 the rebuild is required for any App Store update, Duo users or not.
Our app is React Native or Flutter.: Same problem, same fix. The iOS build still has to be produced with the new SDK, and the layouts still have to adapt.
Do you need our source code?: Yes. A refit without source isn’t possible. We work from your repository and hand everything back.
Our original developer is gone.: That describes most of the apps we see. We recover the project, bring the build up to date and document it so you’re not stuck again.

Send us your App Store link. We’ll tell you what your app needs within one business day.