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OSHA-NIOSH Heat Safety Tool

Centers For Disease Control and PreventionUtilities

View in the App Store
On iPhone Duo

Letterboxed

OSHA-NIOSH Heat Safety Tool runs in an iPhone-sized window with black bars.

Its latest version is built with the iOS 17.2 SDK,[1] which Apple shows letterboxed on the inner display.[2]

How we know
From the app’s build
Checked on
Version 3.7
Build
iOS 17.2 SDK
Latest version
3.7, Jan 6, 2025
Status updated

What owners report

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Version history

  1. Version 3.7Letterboxed

    iOS 17.2 SDK

    Checked Oct 23, 2026

Sources

  1. App Store build, version 3.7

    Built with the iOS 17.2 SDK. Uses none of Apple’s iPhone Duo APIs.

  2. Apple Developer: Prepare your app for iPhone Duo
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