It’s a fake Apple website. Just don’t install that APK and you’ll be OK. Your iPhone may get infected if you install it. Check out EverythingApplePro's vid on YouTube, these things cause huge problems.
I figured it was a fake just never had one pop up on any of my iphones. I'll check out the video...get these every so often on my old macbook...my favorite is the FBI warning that want you to pay your fine online and freezes up the laptop...took forever to get that off the macbook
I got a text supposedly from Facebook saying my account was temporarily shut down. Sending me a link to reset it up. I deleted it. Not falling for that trap