Looking for truly free, second phone number ap…

Burner, sideline, etc. are all paid which means it’s tied to your card which I’m not doing. Wondering if anyone here knows of an actually free (not free to download, not free 7-day trial, but permanently free) 2nd phone number app for IOS.

I realize these are linked to your actual phone number and therefore aren’t really private at all Thank you!

Found here