South African here. Just about all notifications have moved to WhatsApp. Most school classes have a group for the parents, extended family group, immediate family group, residents association group, high school classmates group, gym class group, home town group ... the list goes on. Sounds like a lot but most groups tend to have few messages.
I sincerely believe if you have the right database design before you develop your application then analyzing your data will be a piece of cake.
Feel free if you want to get in touch discuss anything related to BI and SQL.
Blog: http://www.msiman.ga
Email: m m s i ma ng a @ g m a i l . c o m