Background: after sending the https://rt.live link to my father (a retired computer science professor with a background in mathematics), he recoded their estimation model in Julia and created a chart showing the estimated R value for South Africa (where we are from) over time. Since then, I've helped him extend this to work off the data that's being collected by https://github.com/GoogleCloudPlatform/covid-19-open-data to provide R estimates for regions around the globe.

Get straight to your region of interest by searching on the landing page - https://reproduction.live

Or navigate through the region hierarchy from https://reproduction.live/world

Feedback appreciated! (I'm aware that the bubble chart isn't that helpful currently on mobile)