Other users have already explained the technical aspect of PWA (i.e. you can install it and run offline as a desktop app). I just want to add that by offline-fi

Other users have already explained the technical aspect of PWA (i.e. you can install it and run offline as a desktop app). I just want to add that by offline-first I also mean confidentiality -- your data doesn't leave your device, whether you're offline or not.