Wondering why they've launched this as part of their Search App (and not as a stand-alone app). Maybe they're afraid of (yet another) anti-trust lawsuit?
If they had launched an app, we would have people here complaining about how no one wants to install an app for a tiny functionality, and then when Google would have inevitably canceled the app in a few years because of lack of installs, we'd have posts complaining about how Google pulls the rug from under its apps.
As for those interested in trying it out, the feature is part of Google Assistant.
Or even better, stick it up at google.com, zero install, zero update, zero app etc.