As of today, ChatGPT is the #4 Top Free app on the US iOS App Store: this chart only measures new/recent downloads.
The #1 and #2 apps are non-coding, pure consumer AI applications (Meta Muse and Momo).
You are living in another world. I don’t know a single people who is not using ChatGPT, Gemini or Claude. Even my non tech parents are using it everyday.