Anybody here use Clickworker?

I’ve been seeing some posts lately about clickworker and I tried downloading it on my phone to see what it’s all about, because quite frankly, I don’t really know what goes into this.

Anyway, I have an iPhone 12 and when I try to sign up for clickworker on the app it says I can’t use this device? I’m not really sure why. I tried signing up once with my Apple ID, and another time with my Gmail. Neither work. I’m wondering if any of you had this problem as well? And can I do it on my computer instead?