How can I use face id to log into an app that supports it?

[Deygus]

I'm confused...

So I have the Blu Vivo XL4 and it supports Face ID and Touch ID.

The Face ID works to log me in through the lock screen but after that, I can't seem to figure out how to use it on apps that support face id login.

Am I missing or not understanding something somewhere or is that a problem with the app instead?

I noticed that I can use my fingerprint to log in on some apps and that works fine but it was just that I was thinking maybe I'm not doing something right to use it on apps that support face id login.

Does anyone know?

 

[Dannydet]

Some apps support it and some don't.
You may need to get into each apps settings for that.