"link To App Store" Widget For Mobile Website

For the past months I have found several websites using some kind of 'widget'. If I open a website having this widget with my iPhone, it will display a link to the (website related

Solution 1:

You're looking for "Smart App Banners".

http://developer.apple.com/library/ios/#documentation/AppleApplications/Reference/SafariWebContent/PromotingAppswithAppBanners/PromotingAppswithAppBanners.html

Usage is as simple as adding the following meta tag to your web page's source code, specifying the Apple App Store ID some affiliate data, and even a URL scheme argument.

<metaname="apple-itunes-app"content="app-id=myAppStoreID, affiliate-data=myAffiliateData, app-argument=myURL">