Redeeming a code for Photomator

[Illy]

Hey everyone,

I got a code (or coupon or some sort) that I need to apply to my account in Photomator, and I can't really find the place to redeem it.
I am using MacBook, but also iPad, so it doesn't really matter where I apply it - but I've been looking for the place to redeem this code on the AppStore, the apps and the internet, and couldn't find it.


Thank you!