19 February 2020
About a couple of months ago, Google announced a new security technology that allowed users to use their Android devices as security keys for signing-to Google accounts on PC or laptops. The feature works with Windows 10, macOS, and Chrome OS but now, it has been expanded to support iOS devices as well.
It means you can now sign into Google accounts on your iOS device using the same Android security key technology. The only major difference is that the PC version relies on Chrome browser being the mediator but on iOS devices, the same communication will be facilitated by the Google Smart Lock application. This difference is because of the restrictions iOS applies to apps about how they can and can not work.
To take benefits of this new announcement, the first step is to ensure that you have enabled 2-Step Verification (2SV) for your Google account. The next step is to visit 2-Step Verification settings and choose your Android device running Android 7.0 Nougat or higher as a security key. This can be done by clicking the Add security key option which will offer a list of available devices.
The next step is to install the Google Smart Lock app on your iOS device running iOS 10 or higher. Now when you want to sign-in, turn on Bluetooth on both iOS and Android devices. Use the app for entering your Google account details and wait for a notification to appear on your Android device. It will have some instructions to verify your identity which you need to follow. If you will do everything correctly, you will get authenticated and will be able to sign in successfully.
Google says that the new feature has been released for all users regardless of someone being a G Suite user or not. It should become available for you anytime soon.