[Velc]

You can check the browser user agent is running safari + !standaloneMode and show a popup modal. This is how I handle it in react.

Surprisingly it actually converts to "Installs" incredibly well. Better than some native apps I own. I think user friction is actually quite low - no 'web app > app store > mobile app' flow - just two buttons and its on the home screen, no need to login w/ apple id etc.