During Rails World 2024 the 1000 attendees had the experience of using 2 PWA apps.
The Agenda app by Telos Labs, and a Campfire instance.
In this video I will show you how the two apps work.

I am very grateful to Telos Labs for making the agenda app open source, so that everyone can learn and (reuse?) it as a boilerplate their events.

Telos Labs Agenda App source code: http://github.com/TelosLabs/rails-world
Buy Campfire: https://once.com/campfire