The other problem

"The other problem," your friend declares, "is that our users will mostly be on their phones. On the go."

"So you want to do an iOS and Android app?"

Your friend waves his hand. "No, no. No one downloads apps anymore. Especially in developing countries; that takes too much bandwidth. Remember, worldwide collective."

"So a web app."

"Yes. A web collective."

Despite your best instincts, the project intrigues you. How do you craft a web application to be as fast as possible? How do you make it work under all network conditions? How do you make a chat application with all the conveniences of a native app, but for the web?

You sigh and shake his hand. "Let's get to work."