This app aggregates information from various data sources and provides push notifications too. It is without a doubt the best source of this information and the app being unavailable significantly affects the day to day lives of a significant portion of the South African population who use it to plan around these power outages.
While the app also has a "chat" feature, it's really tangental to the primary purpose of the app and I expect that most users of the app, like myself, don't use that feature at all and only care about knowing when they will be without electricity.
In case you're wondering why they hell we have load shedding, it's because Eskom is grossly incompetent. Their incompetence is hugely exacerbated by nepitism and corruption where government has historically appointed people to Eskom management positions solely as "favours", rather than on qualification for the job.