Loading a web in a simple iOS application

I am new to iOS development. I am trying to build a simple iOS application to display statistical results from my team's websites. This web is currently on my node.js server.

I believe there is a way to simply load the websites using UIWebView.

1) However, I want to make sure if this is the proper way to build an application and if it is okay with the Apple's AppStore policy.

2) I also want to know the advantages of using the RESTful API and native code over just simply loaded with a view.