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iPhone Duo goes on sale Oct 23, 2026. Developers are likely to update their apps then, so statuses are for reference until launch.

Release day, your time18:26:58

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Speed Test+ -HW Test,Toolbox

哲 魏Utilities

View in the App Store
On iPhone Duo

Letterboxed

Speed Test+ -HW Test,Toolbox runs in an iPhone-sized window with black bars.

Its latest version is built with the iOS 13.6 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know
From the app’s build
Checked on
Version 1.5
Build
iOS 13.6 SDK
Latest version
1.5, Aug 20, 2020
Status updated

What owners report

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Version history

  1. Version 1.5Letterboxed

    iOS 13.6 SDK

    Checked Oct 22, 2026

Sources

  1. App Store build, version 1.5

    Built with the iOS 13.6 SDK. Uses none of Apple’s iPhone Duo APIs.

  2. Apple Developer: Prepare your app for iPhone Duo
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