Open code reader

Dear,

I would like to insert into WorPress a plugin that can scan qr codes when opening the site on a smartphone or tablet.

I have a web app for smartphone. It’s a kind of loyalty card. It is based on a website developed in WordPress. And I would like the user to read qr code through this application. But I do not know how to do this, or if there is any WordPress plugin to do this.

I’ve seen that a simple add button image of a form’s plugin “contact form 7” in WordPress can open the camera of the smartphone. So, I thought there was some middle of a button (that is placed in WordPress) to activate another feature of the smartphone, to read the qr code.

The qr code I can generate normally. My problem is to read with the smartphone, in an app that is based on a WordPress site.

That’s what I want.

It is possible? Is there something like that?