Which iOS Assistant Is Best: Siri, Google Assistant or Cortana?

My iPhone is now packed with helpers. It started with Siri, the digital assistant baked into iOS, that was waiting for me the moment I fired up my iPhone SE for the first time. But now Google is moving in on Apple's turf by releasing an iOS version of Google Assistant, its own take on a helper powered by artificial intelligence. Illustration: Tom's GuideAnd Google Assistant isn't even first app angling to replace Siri as my go-to iPhone helper. Cortana, Microsoft's digital assistant, has been available for iOS devices for more than a year.