The texts which I added to my app are not shown well on phones which have large screen.
You probably set up all the components as % size, which is not a stable reference when going from one device with a large aspect ratio (like the one you call ‘large screen’) and one that is closer to square.
You have to face the fact that what appears round on your “small screen” will either be an ellipse on the taller one, or would have to use only part of the display, leaving some bands at the top and/or bottom.
Do you think the lines which are shown on the large screen are shown because of the same reason ? @CBVG