I just installed it. It identifies many of my recent robocalls as spam. Thanks!

It also allows me to block numbers from my sim area code. This is where most spam calls spoof to be coming from. When I recently called T-mobile to ask for them to do this, they said they couldn't help me.

I'm not entirely sure that is correct, because the behaviour of hiya and t-mobile's offering is different. Hiya will hang up on a spam call, but t-mobile's app seems to make it so they don't even connect to me.