iPhone Starbucks coffee app what's it do?

After experimenting with having two separate apps, Starbucks finally unified them into a single, got to have app. This app allows you to manage your Starbucks card, pay for your purchases, track your rewards, find a store, see a menu, buy a gift, apply for a job, and more!
   If you're a Starbucks fan, you need to have this app. In theory you can go ahead and dump those other two; this one replaces them entirely. However, be aware that some users are complaining that their information from the mobile card app was lost in the switch, so be sure you've backed everything up first.
  The Starbucks® app for iPhone® is the quickest, easiest way to pay for your coffee—no wallet necessary. The app is completely redesigned with an improved interface, a more personal dashboard experience, digital tipping and other great features, including easy access to our loyalty program, My Starbucks Rewards®.