Android Application Project - Restaurant menu on a tablet

We developed the website and online menu of a restaurant. The owners want their static menu (no orders, no web connection) to be available on their tablets (Android Operating System). We developed the ASP.NET admin platform to create or update the menu items and the menu is exported as a bundle of HTML pages and images. What we need? We need a program (and the source code) written in .NET, that will convert the static website (HTML pages+images) into an APK file (Android Application). There are online webpages that does it automatically ([login to view URL]) but it is still to complex for the restaurant owner to use it.