Cannot be used, will lock you out of your account – Google Smart Lock Review

Google is forcing iOS users to use this app but they didn’t test it at all before release: 1. You cannot safely use it with the Advanced Protection Program, contrary to their recent press release: if you set it up before enrolling it was removed by the enrollment process 3 out of 4 times in my testing. Once APP has been enabled, you cannot login from the device to enable this app. 2. Google breaks security key logins for iOS by assuming that you have this app working: that prevents the NFC FIDO key I use on compliant sites from being used. 3. It doesn’t actually work: Google.com says notifications were sent but they never arrive.
Review by acdha on Google Smart Lock.