How to make a redirect (redirect) from the mobile version of the page to the application?

Question

Java

Hello. For example, the site has a WhatsUp or Instagram button, or the designation of any other application.
It is necessary that when the button is pressed, if the visitor is from a mobile device, then he would be redirected to the mobile application (well, or asked: "Do you want to open in the application?"), And if the visitor is from a computer, then redirect accordingly to the page in the browser.
How can I do that?