I have that quick circle folio case, and it fits perfectly. When it is folded all the way around, the curve doesn't disrupt the case at all. In fact, the circle cutout enables you to still use your camera with the case flipped back. You have nothing to worry about. Also, check the Google Play Store for Quick Circle apps. I posted a thread about these apps, see if you can find it. It is titled, I got some new accessories, or something like that. Lol. Hope this helps.
Posted from one of my many Android devices.