Starbucks says mobile payments are taking off in a big way and it’s already handling almost 7 million a week at its U.S. coffee shops.

That accounts for 16 percent of all transactions at its stores and, the company says, meant it transacted 90 percent of all of mobile payments in the entire U.S. in 2013.

The company’s slice of the national mobile payments market is sure to dip in the years ahead as other retailers start catching up to Starbucks, in part thanks to the recent launch of Apple Pay, but Starbucks says it sees no slow down in consumer adoption of its mobile payments technology.

Starbucks has integrated payments into its its own app, which allows customers to keep a prepaid Starbucks card on their phone, enabled with automatic refills when it gets low on cash, and keep a list of favorite drinks to make ordering easier.

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