How to find out if viber is installed on the device?

Question

PHP

I work with the site, it has a block in the sidebar with links to social networks, one of them is on viber. The problem is that if the application is not installed on the device from which they are trying to click on viber, then the person is transferred to an empty document (on a PC) or an alert is displayed that the viber application is not installed (on MU). The first thing that comes to mind is to do a type check:

(if the application is installed) {
in href, substitute a link to the chat;
}
(otherwise) {
in href, substitute a link to the viber's official website to download the application;
}

How can I find out if the application is installed on the device or not? Or maybe there is an alternative solution to the problem?
Link to the site absolutnsk.ru

Answer 1

No way. This information is not provided to the browser

Answer 2

Yes, I agree, unfortunately there is no way to check in the browser