I have some customization in my website and I want to develop this site in a app -- 7

I have some customization in my website using Listeo Theme. You have to implement date picker with plugin and then check date event data is exist in database on the selected [login to view URL] I have to develop this site in a app. The developer of listeo say that listeo Is prepared to be trasformed in app with a plugin, Fluxstore listing That i have already bought , The app may be a webapp with same functions of the site For users and for owners. fixed Budget 15 Euro for customization, 85 for Convert my site into App.