Starbucks aficionados on iOS will soon get their caffeine fix via Apple Pay, but people don't get about their daily routines by coffee alone. That's why Apple's digital wallet service will also expand to a duo of popular diners.

Apple Pay boss Jennifer Bailey told Recode during the Code/Mobile conference this week that selected Starbucks, KFC and Chili's branches will participate in a pilot program before the end of this year, with wider availability coming in the first quarter of 2016.

For the record, Starbucks was one of the first major establishments to utilize mobile payments services through the barcode method built into the coffee company's iOS and Android app, Apple Insider reported.

The app acts a Starbucks rewards card, which can be reloaded using Apple Pay. It can also track purchases, which means iOS users can add it to the iOS Wallet app. The scan-to-pay method constitutes 20 percent of all Starbucks transactions. However, there is no mention whether or not the coffeehouse chain will count direct Apple Pay transactions as part of its rewards program.

As for KFC and Chili's, the former is a patented Yum! Brands while the latter is a subsidiary of Brinker International. Naturally, Apple Pay will help lines at the aforementioned diners to move a lot faster starting next year.

The Cupertino tech giant said their digital wallet service has a customer satisfaction rating of 98 percent although one tech analyst pointed out that Apple Pay only accounts to 1 percent of all payment transactions in the United States.

Apple Pay is pitted against Samsung Pay and Android Pay, as retail cash registers have become the new frontier in the ever-evolving smartphone battlefield. As of the moment, the usage rate of digital wallet services is relatively low. This means now would be the best time for mobile and OS developers to make a big splash.

Apple Pay is currently available in the United States and the United Kingdom. The service is expected to be offered in China and Canada anytime soon.

Bailey also explained the event that that the popularity of Apple Pay is growing since its priority is on users, and not on solely making a profit, as per The Wall Street Journal.

"Some of our predecessors in the space were focused on the business model. We were focused on, 'How do you make the best customer experience?" said the high-ranking Apple executive.

Bailey also hinted that Apple Pay could eventually expand to the travel industry and might soon help airline passengers process their payments, orders, movies and even their food.