I’m quite happy because of the addition of the new sounds to the operating system, so that I don’t have to install any extra app.
However, if this is such a quality app, and from what I see, has no in-app purchases or subscriptions, maybe I’ll get at least the iOS/iPadOS app which is just 3€. By the way, you shared the link to the Mac app.
I see, however, that they haven’t updated their app in like… 4 years. At least the iOS/iPadOS app. So I wonder if they have adapted the app to the new system so that we can put the sounds on the control center, which is quite convenient, tbh.