YAPPADAPPADOO project really nailed it when they used Progressive Web App (App). Even though the technology was currently used by some applications online, they have improved it and they powered it by Blockchain Technology to make it more secure and more reliable.
I agree with you,BuzzerBeater. Yappadappadoo have chosen to take the app user's experience to a higher level, as they use
this PWA : being a Progressive- which means it works for every user, regardless of browser choice;
Responsive- fits any form factor: desktop, mobile, tablet; Connectivity independent - With service workers' help to work offline or
on low-quality networks.And not to mention the Blockchain Technology with it.