Does Guitar Wiz work on iPhone Duo?

Yes. Guitar Wiz is updated for iPhone Duo and uses the full inner display. Version 2.2 (October 9) release notes: “Introducing a major Guitar Wiz update, now fully optimized for iPhone Duo!”

Is Guitar Wiz letterboxed on iPhone Duo?

No. Guitar Wiz fills the inner display.

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Guitar Wiz

Name: Guitar Wiz - Tuner & Chords
Author: Bijoy Thangaraj

Bijoy ThangarajMusic

View in the App Store

On iPhone Duo

Fits

Guitar Wiz fills the inner screen and adapts when you fold.

Version 2.2 (October 9) release notes: “Introducing a major Guitar Wiz update, now fully optimized for iPhone Duo!”[1]

How we know: Claimed by the developer
Latest version: 2.2, Oct 9, 2026
Status updated: Oct 18, 2026

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Sources

App Store: Guitar Wiz 2.2 release notes

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