An app within an app?

[anewme2015 345]

I seem to be able to access some information easily (basic profile stuff, threads etc.) through Bariatric Pal but then when i click on More- my surgery story and to change settings (which I have yet to do successfully) it seems to open another app or something. I just found a box that shows notifications, messages etc but it doesn't seem connected to my bariatric pal homepage.

I'm not very technical so this may be a silly question but are there two apps? Is there a way to have all my info accessible through the phone app? I've never used whatever is offered through the web. I seem to have an app within an app. Perhaps I'm missing an update or something? I have an iPhone 4s.

[New nana 30]

I cannot creat a weight loss ticker. It never goes through. I think Bariatric Pal is having some glitches