Does HUAWEI Health work on iPhone Duo?

Not yet. HUAWEI Health runs letterboxed on the inner display, with black borders around an iPhone-sized window. Its latest version is built with the iOS 26.0 SDK, which Apple shows letterboxed on the inner display.

Is HUAWEI Health letterboxed on iPhone Duo?

Apps built with the iOS 26 SDK or earlier show black borders around an iPhone-sized window on the inner display; iOS 27 apps resize to fill most of it, and iOS 27.1 apps fill it completely. Current status: Letterboxed.

All apps

HUAWEI Health

Name: HUAWEI Health: Global
Author: Huawei Services (Hong Kong) Co., Limited

Huawei Services (Hong Kong) Co., LimitedUtilities

Not on the App Store in the United States.

On iPhone Duo

Letterboxed

HUAWEI Health runs in an iPhone-sized window with black bars.

Its latest version is built with the iOS 26.0 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know: From the app’s build
Checked on: Version 17.0.8.318
Build: iOS 26.0 SDK
Latest version: 17.0.8.318, Oct 13, 2026
Status updated: Oct 24, 2026

What owners report

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Version history

Version 17.0.8.318Letterboxed
iOS 26.0 SDK
Checked Oct 24, 2026

Sources

App Store build, version 17.0.8.318
Built with the iOS 26.0 SDK. Uses none of Apple’s iPhone Duo APIs.
Apple Developer: Prepare your app for iPhone Duo