I got the same thing. When I look at the fingerprint details though, it's not clear why it should be "nearly unique". Of the things listed there, there's not mu

I got the same thing. When I look at the fingerprint details though, it's not clear why it should be "nearly unique". Of the things listed there, there's not much that's customizable, mostly just time zone, locale, DNT, and if cookies are enabled. That said, it also has "Hash of canvas fingerprint", which apparently has a lot of bits, but I have no idea what information that's actually extracting. Similarly "Hash of WebGL fingerprint". I did try this on iOS 11, which they probably don't have much data for yet and would explain some of the unique-ness, but you said iOS 10.3.3 which is much less new. Maybe iPhone users just don't try panopticlick very much?