title: Create link to open app from mail without making changes in app
body: <p>I have an app which is already published in app store, I need to send mail to users with link clicking on which it should open the app if its installed or should go to app store. I'm aware of the URL schemes and universal links and that would require modification in my app. I was wondering if there is any other way that this could be achieved where I could create a link maybe using <code>itms-app</code> or some other method where I don't need to make any changes in the app. Any help is appreciated</p>