During a recent quick search of the Android Market, I thought I had stumbled upon the official Starbucks for Android app. However, after a quick check, it looked like the free “Starbucks Card” app was from a third party even though it could check card balances. I did not download and install it after noting it was not an official app. So, I can’t say how it checks a Starbucks card balance.
The numerous Android apps that are related to Starbucks seems to indicate there is a lot of interest in getting information about Starbucks stores and membership cards. Yet, there is no sign of an official Starbucks for Android app.