I used an iPhone with older software on this site for years. I kept the old software just because I happened to like it for navigating and the way it displayed pages etc. Over time that software had difficulty navigating TCF as well as many other sites. It also was too full of stored data to do a new software install without clearing a lot more available memory space, besides I wanted to retain it simply as a storage device.
So I picked up a new iPhone 8 Plus. Everything worked perfect right out of the box, I just had to set a bookmark on the homepage after signing in and checking the stay logged in box (which should be labeled not blank), and switching to the Active Topics page and full site mode before setting the bookmark.
By the way, I think the internet gateway to this site via google etc is retarded, what newbie would even pause there. It’s a bunch of random threads with often years old start dates. Do yourself a favour and set the gateways on Active Topics and the current page. I think you would see a massive increase in viewers exceeding a five second look.