Web Based application like Remodelista [Help!]

[genesisyell]

Hi, I'm very new to app development and currently learning web based application.

For the start of my project, I was curious how an app called 'Remodelista' works. It seems like remodelista has a web (blog style) db and bring that db (or RSS feedback system?) into the application.

Do you think it uses RSS feedback or takes a part of HTML code of specific blog page and show that html code on the application? I'm really curious.

Just want to use a system like that (a system that blog has the db and bring that db into the app).

Anyone has a thought about this kind of solution?
I just don't have where to start from.... and it would be a great help for the nubb who is learning how to program a proper working application

Thanks a lot for reading this and you have a great one!