When a Sololearn course has been updated, how do we get to know what has changed?

Answer 1

If I recall correctly, you might see this info in your OS application store.
In my "career" here I witnessed one upgrade (HTML) and it was spotted by suddenly the progress circle in HTML not being full anymore :)
But that was long time ago. I think the application is now capable of sending PUSH messages (vide: daily streaks) for alerting about new features.

Answer 2

@Kuba Siekierzynski
It does not work for me