App download function

[TjeerdvZ]

Hi,
I'm looking for more documentation on how you can implemented the functionality when a mobile user visitis a website and in the top of the website appears the "app download" function?
For example as on m.zalando.nl when being visited from an iphone.

[N1ghteyes]

Im not sure your really in the right place for that kind of question (its not really SEO related, more technical web development)

To point you in the right direction though, stackoverflow is a good resource for development questions:

http://stackoverflow.com/questions/14520036/how-to-detect-user-is-on-a-mobile-device-and-offer-app