Does Lock Launcher work on iPhone Duo?

Yes. Lock Launcher is updated for iPhone Duo and uses the full inner display. Version 2.1.6 (September 13) release notes: “New: Ready for the foldable iPhone Duo and its wider screen”

Is Lock Launcher letterboxed on iPhone Duo?

No. Lock Launcher fills the inner display.

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Lock Launcher

Name: Lock Launcher - Launch Apps
Author: 6X Studio LLC

6X Studio LLCUtilities

View in the App Store

On iPhone Duo

Fits

Lock Launcher fills the inner screen and adapts when you fold.

Version 2.1.6 (September 13) release notes: “New: Ready for the foldable iPhone Duo and its wider screen”[1]

How we know: Claimed by the developer
Latest version: 2.1.8, Oct 10, 2026
Status updated: Oct 18, 2026

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Sources

App Store: Lock Launcher 2.1.6 release notes

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