You may see a smart banner in action by visiting zenrooms.com in Mobile Safari on an iOS device, or in Mobile Chrome on an Android device.

 

For Apple, you can add a smart banner as follows.

<meta name="apple-itunes-app" content="app-id=1127256404, app-argument=https://www.zenrooms.com/">

 

For Android, it looks like:
<meta name="google-play-app" content="app-id=com.zenrooms.app">