Wikipedia.org add mobile app badges

The what
The Discovery team would like to add links to the Wikipedia app near the bottom of the wikipedia.org portal page; this will provide an introduction for our visitors who are interested in, or prefer to use, the platform-native mobile apps. It's a change that makes sense to the portal team, but we want to ask the communities for feedback and suggestions.

The why

 * The Mobile Apps teams have created two applications that can be downloaded from the Google Play for Android or the Apple iTunes store for iOS.
 * These apps are designed to encourage users to dive deeper into any particular subject, to look up random facts or to conduct in-depth research.
 * Both apps rank in the top 50 apps in the Reference category for both Android and iOS; each has met with favorable reviews.
 * The apps include features that extend the idea of discovery, such as the iOS "Explore" feature.
 * It appears that not many users of Wikipedia know about these two free apps.
 * The WMF would like to provide a non-intrusive method of discovery for these apps, unlike previous solutions which used banners.
 * Other organizations, such as Firefox, utililize their central landing pages (or portals) to provide links to their mobile offerings.

The who
The people that will most benefit from this addition are readers of Wikipedia, particularly those visiting the WIkipeida.org portal from a mobile device browser. We know that mobile device usage is increasing day by day and we would like to offer them an alternative way of accessing Wikipedia.

The how

 * 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 badges will link directly to the free Wikipedia apps, for Android or iOS devices.
 * The badges are not vendor-specific (Apple, Google), but are designed to follow the aesthetic design of the Wikipedia.org portal.
 * Design mockups are below and to the right (on this page).
 * The badges will appear at the bottom of the page, below all existing portal content.


 * The download app links will use a specific URL that will count how many downloads of the apps were initiated from the portal page.
 * Phabricator tracking ticket

What's next

 * We'd like interested community members to provide feedback on adding Wikipedia branded app badge images and a free download link to the Wikipedia.org portal page.