As you yourself said, your app is "just a link to the site."
According to the guidelines:
Your app should include features, content, and UI that elevate it
beyond a repackaged website. If your app is not particularly useful,
unique, or "app-like," it does not belong on the App Store. If your App
does not provide some sort of lasting entertainment value, or just
plain creepy, it may not be accepted. Apps that are simply a song or
movie should be submitted to the iTunes store. Apps that are simply a
book or game guide should be submitted to the iBooks Store.
Bottom line: Your app must contain features, content, and UI that differentiate it from a simple website. If your app is not useful, it should not belong to the App Store.
Ask yourself: What's the difference between downloading your app or manually creating a shortcut on your home screen?