Recently I was browsing a website from my iPhone and it prompted me to download their app at the top of the browser. We are also having same kind of app in iTunes and wants our users to see the notification same as theirs. Attaching a screen-shot. Anybody suggest how is this achieved?Through some script or plugins. Help us to integrate this.
When the user visits your webpage, you can check the browser & OS of device requesting the webpage. Depending upon this information, you can write the script to navigate user to your app download link. Check How to detect my browser version and operating system using JavaScript? for reference.