Notification - download the app?

Question

React

There is a site on React, how to implement a hint for the user with links to a mobile application (when you open the site to display links - "Download the application"? Moreover, if the user already has the application installed, there should be a link - open the application

Answer 1

https://developer.apple.com/library/archive/docume...
https://developers.google.com/web/fundamentals/app...