Can't use this on XR – 30 Day - Plank Challenge Review

I own an IPhone XR and this app is not compatible with it. The screen is enlarged and cannot be adjusted because of this you cannot start Day 1. I emailed the company to advise but, I haven't heard anything back. I'm realizing as I read past reviews, this is something the programmers just refuse to fix.
Review by Mandylion4 on 30 Day - Plank Challenge.