Install iOS 11.3 If You Own an iPhone X & Have Kids
iOS 11.3 comes with an exciting iPhone X-specific feature that allows parents to approve family purchases using Face ID.
They're able to use Touch ID to approve purchases through iOS' Ask to Buy feature, but it doesn't work with Face ID. That's changed with the release of iOS 11.3.
If own an iPhone X running iOS 11.3 you should now be able to approve purchases using the iPhone X's Face ID.
A prompt to use Face ID appears once the parent has entered the correct password. Once the password is entered, iOS will ask if it should enable Face ID for future purchases.
This should've been enabled from the get-go, but we're excited it's finally here in iOS 11.3.