Does Planner 5D work on iPhone Duo?

Yes. Planner 5D is updated for iPhone Duo and uses the full inner display. Its latest version is built with the iOS 27.1 SDK and uses Apple’s iPhone Duo APIs.

Is Planner 5D letterboxed on iPhone Duo?

No. Planner 5D fills the inner display.

All apps

Planner 5D

Name: Planner 5D: AI Home Design
Author: Planner5D, UAB

Planner5D, UABUtilities

View in the App Store

On iPhone Duo

Fits

Planner 5D fills the inner screen and adapts when you fold.

Its latest version is built with the iOS 27.1 SDK and uses Apple’s iPhone Duo APIs.[1]

How we know: From the app’s build
Checked on: Version 5.13.1
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 5.13.1, Oct 19, 2026
Status updated: Oct 26, 2026

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Version history

Version 5.13.1Fits
iOS 27.1 SDK
Checked Oct 26, 2026

Sources

App Store build, version 5.13.1
Built with the iOS 27.1 SDK. Uses UIHingeInteraction, UIView.reservedRegions, UIArrangementViewController, UISplitArrangement and SwiftUI’s reservedRegions.