title: How to detect whether or not an Android phone has a specific app installed?
body: <p>I've already done this for iPhone app detection, using the meta tag described here:</p>
  
  <p><a href="http://developer.apple.com/library/ios/#documentation/AppleApplications/Reference/SafariWebContent/PromotingAppswithAppBanners/PromotingAppswithAppBanners.html" rel="nofollow">http://developer.apple.com/library/ios/#documentation/AppleApplications/Reference/SafariWebContent/PromotingAppswithAppBanners/PromotingAppswithAppBanners.html</a></p>
  
  <p>Now I'm trying to do the same for Droid-app sniffing. Basically, I want to check if the user has the 'sniffing' app installed or not.</p>