I am about to publish a 2nd paid app and am a little unsure how to go about licensing and [basic] piracy protection.

With my first app I made it very restrictive - a failed lvl query resulted in the app not working. Unfortunately the amount of false positives has been considerable, but I had the luxury of being able to make old versions of the app obsolete with updates and trying various things over time.

The new app is going to be much more casual/simple, so I'd like to avoid any strict lockdowns. Its also not dependent on anything else, once its out, its out.

I'm wondering if anyone here has some experiences to share as far as handling failed purchase checks. The goal to is to deter the most causal of pirates - nothing fancy.