Aerobic Pro - HR Zone Training

Had to delete before starting can’t see whole screen with iPhone 15 pro

The screen size doesn’t adapt to my phone. There’s a question have you ever heard of …? The rest of the question isn’t viewable on my phone screen. I tried changing to landscape view and all I could see was the number buttons for rating how familiar I am with whatever it was that the question was asking about. I tried to guess by selecting a number but then I couldn’t get started because the screen size doesn’t resize or adapt and I can’t select the next button and the get started button doesn’t move or doesn’t work.