title: iOS : Open maps from my custom app opens Google Maps in Safari instead of Google Maps app
body: <p>My custom app has a map on one of the pages. If you click on that map (that is showing the location of a patient) it is supposed to open Google Maps app with the direction from wherever you are to that patient location. For this I use :</p>
  
  <p><a href="http://maps.google.com/maps?saddr=patientlocation&amp;daddr=myaddress" rel="nofollow noreferrer">http://maps.google.com/maps?saddr=patientlocation&amp;daddr=myaddress</a>
  [where <strong>patientlocation</strong> and <strong>myaddress</strong> are long/lat] </p>
  
  <p>On most phones, it works as expected. It opens the app of Google Maps, with the route loaded.</p>
  
  <p>But for a reason I do not know, some phones will try to open Safari and go to Google Maps website, even though my Google Maps app is installed and up to date. It is a problem because the navigation is not as good when you're not in the actual app.
  I have tried to restart phone, to uninstall/reinstall my app, uninstall/reinstall Google Maps app, but nothing will do..</p>
  
  <p>I have sent that link through email to some phones.
  If I click on the link from the native iOS email app, it opens Safari and load Google Maps website.
  If I click on the link from the Gmail app, it opens Google Maps app.</p>
  
  <p>I am a bit lost on how Apple/iOS handles that.</p>
  
  <p>Can someone help?
  Thank you!</p>