Yes! Only on iPhone obviously because it's exclusively for iOS.

Here the iPhone version: https://procreate.art/pocket

I don't know if this pocket version has already received the same updtae 4.1 of the iPad version.
Anyway, I use only the iPad version but for what I've seen so far and what I've read here and there also the Pocket version is a killer App.

Consider that many people (including me) bought the iPad Pro almost exclusively to run this magical App (Procreate).
Maybe this can sound a little bit extreme but if you had the chance to use Procreate at least for some minutes you can understand :)