Amazon’s palm-reading payment technology will soon be available in many more Whole Foods stores. The company is rolling out Amazon One to more than 65 Whole Foods shops in California, starting with Malibu, Montana Avenue and Santa Monica locations in Los Angeles. More stores in LA, Orange County, Sacramento, the San Francisco Bay Area and Santa Cruz will come online in the “coming weeks.”

Before, palm-based payments were only available in a handful of Whole Foods stores in Austin, LA, New York City and Seattle. In California, you could also try Amazon One at the company’s Style fashion store in Glendale and certain Fresh and Go locations.

As usual, One is meant to streamline retail shopping. So long as you link your palm and payment card to the service, you just have to hover your hand over a scanner to complete a purchase. While you still have to stop at a checkout terminal, you don’t have to pull out a phone like you do with Amazon’s camera-based Just Walk Out system.

Third-party adoption may be trickier. While Amazon has touted plans to use One at concert venues and sport stadiums, there’s been a mounting backlash over worries palm data could be misused or stolen. Amazon has maintained that it holds info in secure, One-exclusive cloud storage, but politicians have still been concerned enough to grill company leadership over its practices. There’s a reluctance to trust biometric tech like this, and the Whole Foods expansion isn’t guaranteed to assuage people’s fears.