Ha ha. This reminds me of an old project / library [0] I built based on a Quora answer. I wrote libraries for Android and iOS, also wrote a simple server component which could be installed on Heroku with a single click. At the start of the app, it would contact the server for payment status. If server indicated that payment has been made, it would function like normal. If not, it would just crash.

I never used it in any of my projects nor I know anyone using it. I just had an itch of learning Clojure and building libraries for android, and iOS, so I made them.

[0] - https://github.com/avinassh/little-finger