Does Dictionary & Translator work on iPhone Duo?

Yes. Dictionary & Translator is updated for iPhone Duo and uses the full inner display. Version 36.4 (October 25) release notes: “Added full support for iPhone Duo”

Is Dictionary & Translator letterboxed on iPhone Duo?

No. Dictionary & Translator fills the inner display.

All apps

Dictionary & Translator

Name: Dictionary & Translator
Author: Bravolol Limited

Bravolol LimitedEducation

View in the App Store

On iPhone Duo

Fits

Dictionary & Translator fills the inner screen and adapts when you fold.

Version 36.4 (October 25) release notes: “Added full support for iPhone Duo”[1][2]

How we know: Claimed by the developer
Checked on: Version 36.4
Build: iOS 27.1 SDK
Latest version: 36.4, Oct 25, 2026
Status updated: Oct 26, 2026

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Version history

Version 36.3Should fit
iOS 27.1 SDK
Checked Oct 26, 2026

Sources

App Store: Dictionary & Translator 36.4 release notes
App Store build, version 36.3
Built with the iOS 27.1 SDK. Uses none of Apple’s iPhone Duo APIs.