Discord- Discord is a very popular app that is made for creating ways to communicate with people that share similar interests with you (source). Its layout is also very economical, allowing for ease of use and the ability to switch between 3 lighting settings Light, Dark, and Midnight mode makes it very comfortable (source). Most of the selected audience for this app are teens to adults so they can reach out to others with similar interests. 

And Discord collects money from fancy subscription based services that allows users to upload large files and also adds more customization features (source1-source2)and as of recently also profile customization features for a small fee so It doesn’t force ads unto you. Making this Free chat app incredibly good and nice to use. 

Tik tok-Tik tok is an incredibly popular social media app that had one of the largest impacts on humanity but not a good one. Tik tok was a  simple video sharing app that was made for short form videos. It made a large number of people have some “mental issues” like Adhd. though These problems didn’t stop teenagers from using this app                           (me included) it influenced teens to have shorter memory spans.

Tik tok’s advertisements are made through ads mostly (source)  also light shopping also through the same app making a little extra money for them but most of their cash is made out of their advertisements. Some advice I could give is to only like the posts you enjoy because if you like every single post the algorithm will send random posts.