Everything is fine with timechaincalendar! Great app and I use it all the time, thank you! I just gave it as an example as a PWA. It's fine for an app like this.
What I meant about security is that not all applications will be able to be implemented as PWAs from a security perspective. Especially those that work with users data and funds. Damus had a web version in the early days but it was shut down due to a vulnerability. That’s an example.
We've been talking about leaving Apple's app store for the last few days (I'm not in favor of that) and if PWA is presented as an alternative, then I don't agree with that statement. Maybe partly.