How to Launch an Android/IOS app from drupal site and cleanly fallback to web (deep links)

Facebook example:

Step 1: Get the url to your fan page: https://www.facebook.com/trueapex
Step 2: Go to https://app.urlgeni.us/
Step 3: Paste the url to your fan page in the social field
Step 4: Once the deep links have been generated, make sure to copy both IOS and Android links (just click the gear icon)
Step 5: Install/activate this module on drupal: https://www.drupal.org/project/app_link
Step 6: Go to /admin/config/search/applink and fill all the form fields with the info previously gathered (no need to check the boxes)
Step 7: Save and clear all caches
Step 8: To redirect to FB app, just use the applink's path which uses this format: http://yoursitename.com/app_link/facebook

Where "facebook" is the custom name for the generated app link