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RockHoundR

Ruby Glint Technologies Co., LtdMaps

View in the App Store
On iPhone Duo

Letterboxed

RockHoundR runs in an iPhone-sized window with black bars.

Want RockHoundR to fill the inner display? Be the first to ask.

Its latest version is built with the iOS 26.5 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know
From the app’s build
Checked on
Version v2.2.0
Build
iOS 26.5 SDK
Latest version
v2.2.0, Oct 10, 2026
Status updated

What owners report

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Version history

  1. Version 2.2.0Letterboxed

    iOS 26.5 SDK

    Checked Oct 29, 2026

Sources

  1. App Store build, version v2.2.0

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

  2. Apple Developer: Prepare your app for iPhone Duo
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