Interesting how they'll react to X. WeChat seems to be the closest thing to an "Everything App" that Elon wants to create.
Also look at Facebook. You can talk with friends. Send money. Interact with businesses. Play games. Date. Sell and buy stuff. And many more.
But they don’t have state supported monopoly position, so it’s not an everything app.
I love that your previous comment was that "people use twitter because of free speech", and now I can't even look at it without logging in. Proof that on the internet anyone can sound confident.
In China your health status (green/yellow/red) was automatically calculated based on what neighborhoods of the city you had been in, what other people you passed by in the street or on public transportation, etc. So, it could change in an instant, and that is why it was shown from phone apps that constantly updated. It wasn’t a fixed thing like vaccination status, where a printed form would make sense.
to get your digital travel status there was an app you could download (actually each province hat their own app) and you registered on that with your phone number and passport details (or chinese ID). no wechat or alipay required.
if you didn't have a working phone then you could log in to that app on any other phone at see your status there. in theory it was possible to travel without a phone and not have the fact that you travelled reflect in the app, but in practice it was not worth the trouble.