You can't open up Google Assistant hands-free from the lockscreen or the home screen. You need to open the app first. Apple doesn't allow rival voice assistants.
Well, there is one way to summon Google Assistant hands-free from any screen. But it's an ironic workaround: you have to ask Siri to open up the app for you.
Immediately, asking Siri to open Google Assistant felt as awkward as asking an ex for a their archrival's phone number.
But here's how our test went:
"Can you open up Google Assistant because you're not good enough?"
Here's what Siri did
Harsh request. But we know we made the right decision because Siri heard:
"Can you open up Google Assistant because you're not Goodnuf?" Ugh.
Too often, Siri refuses to hear us correctly.
Asking Siri to "Name this song" in the car sometimes just play songs – and it plays the one album I still have on my iPhone since switching to streaming (the U2 album that Apple via iCloud). That's… not helpful.
Similarly, when we asked Siri to shut off all of our alarms today, it just read every single alarm we have ever set on our phone. It's missing the 'I' in 'AI' on this one.
Siri has been a great voice assistant for me a long time. But we've drifted apart. We're just not connecting like we used to.
from TechRadar – All the latest technology news http://www.techradar.com/news/google-assistant-vs-siri-at-google-io