2 “Hey Siri”

Apple first implemented “Hey Siri” functionality on its iPhone 6s in 2015. At the time, it was pretty basic — and only worked when the phone was charging. It’s improved since then, but despite its flaws in its early development, it actually wasn’t the voice-activation feature.

The Moto X, released all the way back in 2013, was the first smartphone to feature an always-listening trigger phrase for a digital assistant. The phone would automatically wake up when a user said “Ok, Google” — a phrase that has now spread to most handsets equipped with Google’s Assistant.