title: How to check app is installed or not in phone
body: <p>I don't know how to check if app is installed or not on phone! Or when App is installed, open the app, otherwise open the Appstore link to download the app. I'm using <strong>swift 3</strong>. I want to do it using <strong>app name</strong> or <strong>bundle identifier</strong>.
  Thank You!</p>