I am totally new to iOS development and have a question about charging. If I build an iOS app, can I charge app users a monthly fee to use the app? Currently, I run a website where users are charged a monthly fee to be able to access the site. When they first join the site, after they fill out their profile, they are redirected to a payment processor who obtains their credit card information and decides whether or not the card may be fraudulent. If it's not, the user can become a site member and they are directed back to my site which they then have full access to. The credit card company will then charge them my monthly membership fee and pay me a percentage of that fee each month after they deduct their processing charge. I would now like to provide my website's features via an iOS app. Is it possible to create and release an iOS app in the Apple App Store that would adhere to this monthly charging model? If not, what are my options if I want to require that my user pay a monthly fee for access to the app?
P.S.
Thanks to everyone who has provided an answer so far. Perhaps I should clarify my question. I don't want the app to provide access to my website. What I would like to do build an app that provides most of the features offered by the website (and others that are iOS app-specific) with the long-term goal of shutting down the website and converting the majority of its members to the iOS app. I am finding that maintaining and configuring my server infrastructure takes an inordinate amount of time and effort, both of which could be better spent improving my product. I would like to continue charging each user the same monthly fee for using the app that they currently pay to use the website. But of course, they would no longer be paying that fee to the credit card company. Instead there is hopefully a way that I can continue charging that amount from within the app via Apple's charging mechanisms.