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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.

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Cash App

Block, Inc.Finance

View in the App Store
On iPhone Duo

Letterboxed

Cash App runs in an iPhone-sized window with black bars.

Its latest version is built with the iOS 26 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know
From the app’s build
Checked on
Version 5.74
Build
iOS 26.5 SDK
Latest version
5.74, Oct 19, 2026
Status updated

What owners report

No reports from owners yet. Add yours

Sources

  1. App Store build, version 5.74

    Built with the iOS 26.5 SDK. Uses none of Apple’s iPhone Duo APIs.

  2. Apple Developer: Prepare your app for iPhone Duo
See all 9