Favorite apps

What is the most popular app 2021?

For me these are:
WhatsApp
Facebook
Instagram
Zoom

I use social media apps every day, facebook is my favorite one. Plus I found facebook spy app recently and now I can monitor different conversations my partner or kids with its help. Also it help to check SMS messages, call logs, and social site usage, location history, etc. Quite convy, if you want to know more about private life other people.