It's like @uptown described it. It's not so much about what technology is used, but the overall design, work flow, and the user requirements of the Web app. Le

It's like @uptown described it. It's not so much about what technology is used, but the overall design, work flow, and the user requirements of the Web app. Let's take Facebook.com for example, feels more like a website, while its Messenger.com website does feel more like a web app.