September 15, 2015 10:50 AM EDT

Apple’s new iPhone 6s and 6s Plus have a number of new features, including a better camera and improved internal specs. But what really excites Apple CEO Tim Cook is a new way of interacting with the phones called “3D Touch.”

“I personally think 3D Touch is a game changer,” Cook told BuzzFeed in an interview published Tuesday. “I find that my efficiency is way up with 3D touch, because I can go through so many emails so quickly. It really does cut out a number of navigational steps to get where you’re going.”

With 3D Touch, the iPhone 6s can tell the difference between a light tap and a hard press on the screen. That opens up new interface possibilities in apps. When reading email, for instance, you can lightly press a subject line to preview the whole message, then release your finger to go back to your inbox. It’s a feature already found on the Apple Watch, but there it’s called “Force Touch.”

Read the rest of the Cook interview at BuzzFeed.


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