I need a stupid simple mobile app

I need an iPhone app. I already have a design for it, I just need it to be built. Take an existing website and make it an app. Instead of them going to the website they'll be able to open the app, see a splash screen, ask if they'd like push notifications and load the website. If they go anyhwere outside of the website, I want them to stay in the app. It should have a forward and backward buttons. Thats it.