[babuskov]

You can have both.

The way I did this in some of my apps is that JSON data is shared between web and Android/iOS client, BUT rendering that data into HTML is done server side:

The server detects if the request is coming from the browser or client app. If it's the client app. it just hands over the JSON data. If it's the browser, it uses the same data to render HTML and sends that to the browser.