My mobile is an Android, I've got a link to PF (entered at google, typed "Physics Forums", and once into, pressed the vertical three dots, up and right at the screen, and chose "add to home screen"- I am translating from spanish);
To edit my profile; for example, to change my avatar: press my link to PF, then press the three short lines on top and left of the screen, beside the logo, choose your avatar... And follow the dialog box.
To find the threads: I don't usually remember word by word the title, so I enter PF, press the hand lens (up and right), write your avatar where you read "member", choose "Search titles only", press "Search", and then choose the one you are looking for...
I don't know if this is helpful for an iPhone. Hope so. Anyhow, nothing will be more useful than your own efforts. It's a personal opinion.
Greetings, Whipley Snidelash!
