It’s not exactly the most seamless approach in the world, but if you have smarthome kit that is compatible with Google Home but not HomeKit, it does provide access to voice control from your iPhone or Apple Watch. Saying something like “Goodnight Google” to Siri could open Assistant and run a routine like turning off all your lights and locking the door. So you can come up with a custom voice command for a single smart home action - or even to trigger your Google Assistant smart home routines inside of Siri. You can also set up Siri shortcuts for phrases you frequently use with Assistant. If your iPhone is unlocked, you can even access it hands-free by saying “Hey Siri” and then “OK Google” (if that’s the phrase you pick) So you can record a phrase like the usual “OK Google” or “Hey Google” and from then on, whenever you say that to Siri, the Assistant app will open and immediately start listening for your question or command. As The Verge notes, this provides a somewhat clunky way to access the app by voice. The latest version of Google Assistant adds support for Siri Shortcuts. An update to the Google Assistant iOS app means that you can now issue ‘Ok Google’ commands on your iPhone – albeit having to invoke Siri first …
