[thinkt4nk]

Heck of a roll-out, guys.

  - only works on one browser
  - requires interop with the mobile app
  - supporting mobile app version on Android only
  - supporting mobile app version not universally available on Android, presumably because of Google Play registry population or something.

[SifJar]

Also works with mobile apps for WP, BB and BB10. Only iOS support is missing, really.

[kaishiro]

And every single other major browser.