I have mine attached to the back of my iPhone. I use an Otter Box cover and have the holster attached to my belt. It does not get in the way and best of all, if i didn't have it attached I would probably never use it. They (AliveCor) do offer a phone case for my iPhone 6 with the pad already made for the case, but then I would have to give up my Otter Box, so I made my own adjustments to my Otter Box and attached it directly to the hard plastic case behind the rubber Otter Box skin cover. I have had it now for about six months with no issues and it never has been scratched up. (the pads you put your fingers on to read your heart rate are stainless steel).