Does TheGrint work on iPhone Duo?

Partly. TheGrint uses more of the inner display, but not all of it. Owners report it fills most of the inner display, with a thin black bar.

Is TheGrint letterboxed on iPhone Duo?

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: Partly fits.

All apps

TheGrint

Name: TheGrint: Golf Handicap
Author: GRINT LLC

GRINT LLCUtilities

View in the App Store

On iPhone Duo

Partly fits

TheGrint uses most of the inner screen, but not all of it.

Owners report it fills most of the inner display, with a thin black bar.

How we know: Reported by owners
Latest version: v19.0.24 Thor, Oct 16, 2026
Status updated: Oct 24, 2026

What owners report

1 report from people using iPhone Duo

Fits: 0
Partly fits: 1
Letterboxed: 0
Has issues: 0
Doesn’t work: 0

Users report that TheGrint: Golf Handicap fills most of the inner display on the iPhone Duo, with a small black bar remaining.

1 comment

Partly fits
Fills most of the screen with a small black bar
Oct 24, 2026

Partly fits

What owners report

Other Utilities apps