I don't get the value proposition. Why would I use this instead of just using a web view that shows a page from my website?

The only reason for using a service like that is for quick low budget iPhone apps, where I want to give clients an easy way to update the FAQ. But your landing page doesn't show what the admin interface looks like.

Also, I believe that monthly pricing won't fly for your audience. This is only interesting for low budget projects, and you usually don't have an ongoing budget to pay for stuff like this. You'll have to make it a pay-up-front solution.

I think this would work better as a component on one of those component marketplaces, and with instructions how to host the FAQ on your own server.