The Mobile Order & Pay app will let customers order food and drinks before they arrive at a Starbucks store, enabling them to queue jump. Starbucks has also created an Android version of the app.
The app will detect a customer's location and suggest a nearby store from which to collect their order.
People who use the app repeatedly will earn stars that can be accrued for free drinks and rewards via the My Starbucks loyalty scheme.
Once orders are placed, they are sent to the chosen store, where staff begin preparing the items and an approximate collection time is sent to the customer.
Last October’s London launch of Mobile Order & Pay marked the app’s first debut outside its US homeland. The company is coinciding today’s UK-wide roll-out with a launch in Canada.
Ian Cranna, Starbucks’ vice-president of marketing and category EMEA, said: "We’re really proud of Starbucks Mobile Order & Pay, the newest, fastest and most innovative way to buy coffee on the go. It has seen high demand and we’re excited to be bringing it to Starbucks customers across the country.
"We’ve responded to our customers’ on-the-go lifestyles by offering them greater convenience with Mobile Order & Pay providing the ability to customise their drink and food orders, time savings and access to exclusive opportunities to earn Stars with My Starbucks Rewards."