Today it's possible to build web apps that work offline, that store data client side, that one can use without sending any data to the server. A server is still necessary for sync, but sync is optional. You might think that giving the user the choice whether to trust the web app with his data would be great for privacy, but Apple disagrees:
Apple is Still Sabotaging Offline-First Web Apps
Apple is Still Sabotaging Offline-First Web…
Apple is Still Sabotaging Offline-First Web Apps
Today it's possible to build web apps that work offline, that store data client side, that one can use without sending any data to the server. A server is still necessary for sync, but sync is optional. You might think that giving the user the choice whether to trust the web app with his data would be great for privacy, but Apple disagrees: