OT website not secure

Is anybody getting this pop up when using an Apple product to view this website ?

depends what websites you have visited previously

Is anybody getting this pop up when using an Apple product to view this website ?

Yes, getting an ad at the bottom of my screen on my IPhone.

Only the last couple of weeks I'm redirected to a page with a message "Open in app Store?" and the options to "Open" or "Close". This on my iPhone. Not PC.

Usually theses messages are to do with internet provider you are using especially if have anti virus included, they're just advising you this forum is not secure which we already know or should do?..

If you're using Chrome, it's a new update, to point out that any website without SSL enabled is insecure -- that includes this one (you can tell from whether it's http:// or https:// at the start of the website address: https is secure, http is not).