Does Moshi work on iPhone Duo?

Yes. Moshi 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 Moshi letterboxed on iPhone Duo?

No. Moshi fills the inner display.

All apps

Moshi

Name: Moshi: herdr/tmux on SSH/MOSH
Author: Moshi Tech Ltd.

Moshi Tech Ltd.Utilities

View in the App Store

On iPhone Duo

Fits

Moshi 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 4.0.3
Build: iOS 27.1 SDK
uses Apple’s iPhone Duo APIs
Latest version: 4.0.3, Oct 17, 2026
Status updated: Oct 23, 2026

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Version history

Version 4.0.3Fits
iOS 27.1 SDK
Checked Oct 23, 2026

Sources

App Store build, version 4.0.3
Built with the iOS 27.1 SDK. Uses UIHingeInteraction, UIView.reservedRegions and SwiftUI’s overlayArrangementZIndex, ArrangementView and its overlay and split styles.