(Android/iOS) How to open the Google Maps app with directions between 2 points from a website page

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http://stackoverflow.com – I have this simple question. In a web page with google maps, with a set of markers, I show to the users the directions between their current position and a chosen marker of the list. I'd like to add a button "open directions in Maps App" just to give to the user the possibility to drive to the point using the navigator app. Is that possible? Thank you (HowTos)