Wikipedia.org add mobile app badges

The what
The Discovery team wants to add Wikipedia app badges onto the bottom of the wikipedia.org portal page to introduce visitors to the mobile apps that can further the sharing in the sum of all knowledge and to encourage a seamlessly integrated experience for interacting with Wikipedia content.

The why

 * The Mobile Apps teams have created two elegant, informative and intuitive applications that can be downloaded from the Google Play for Android or the Apple iTunes store for iOS.
 * These apps encourage users to dive deeper into any particular subject, to look up random facts or to conduct in-depth research.
 * Not many Wikipedia editors and readers know about the apps that are free to download for Android or iOS mobile devices.

The how

 * The badges will link directly to the free Wikipedia apps that are available for Android or iOS devices.
 * The badges will be shown only to those visitors to the portal that are using mobile devices.
 * The displayed badges will be specific to the type of mobile device:
 * the Android app download badge will only display on Android mobile devices
 * the iOS app download badge will only display on iOS mobile devices


 * The download app links will use a specific URL that will be for counting how many downloads of the apps were initiated from the portal page.

What's next

 * Find out how the community feels about adding Wikipedia branded app badge image and a free download link on the wikipedia.org portal page.
 * Run a test to find out there is interest in downloading the free apps from the portal page.
 * Phabricator tracking:
 * Epic
 * Community chat
 * Mocks