The system, which launched in March in the Pacific Northwest, allows a customer to place an order using the Starbucks app on their smartphone, then pick up their order at the selected store.

To place a mobile order, open the Starbucks app and select the “Order” tab in the upper right portion of the screen. Pick out the items you would like to order, and confirm your selections by clicking the “order” button. This will charge your Starbucks card while placing the order.

Supported states include Alabama, Alaska, Arizona, California, Colorado, Florida, Georgia, Idaho, Kansas, Louisiana, Mississippi, Montana, Nebraska, Nevada, New Mexico, North Carolina, North Dakota, Oklahoma, Oregon, South Carolina, South Dakota, Texas, Utah, Virginia, Washington and Wyoming.

Mobile ordering is only available for iPhone users right now, but Starbucks says it will expand the service to Android — and all U.S. company-owned stores — later this year.