Rabbiting On App

I've tried to purchase this & haven't been able to?
Tried he App Store, tried clicking on the ad on the RWAF website then doesn't show in a search.
Any ideas people?
Thought it would be good for some covert rabbit research at work but currently I'm foiled

I've tried to get it too, and got the same!

Aha, thought I was just being a technophobe & doing something wrong.
I'll contact RWAF