Does HEY Email fit iPhone Duo? | Fits Duo

Name: HEY Email
Author: 37Signals LLC

Question 1

Does HEY Email work on iPhone Duo?

Accepted Answer

Not yet. HEY Email runs letterboxed on the inner display, with black borders around an iPhone-sized window. Owners report it runs letterboxed.

Question 2

Is HEY Email letterboxed on iPhone Duo?

Accepted Answer

Apps built with the iOS 26 SDK or earlier show black borders around an iPhone-sized window on the inner display; iOS 27 apps resize to fill most of it, and iOS 27.1 apps fill it completely. Current status: Letterboxed.

Letterboxed

What owners report

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