When Is Starbucks “Sweet 15” Free Drink Going Mobile?

With the Starbucks mobile app and Mobile Card, it’s a wonder why they haven’t moved their free Sweet 15 drink offer to a mobile platform as well. Don’t get me wrong, I love getting these postcards in the mail, but keeping track of them and their expiration date is somewhat humbug. But I guess that is the point. If I forget to use the card, then it’s my loss and Starbucks’ gain.

But still, if I can pay for my Holiday-themed Peppermint Mocha with my iPhone, why can’t I redeem my free drink using my iPhone?