What I've done, is placing some parts in my code, which are some sort of 'whistleblowers'.
These code parts are just very irrelevant to what my app does, and at the same time, a reader can reveal some personal data of mine. With every update, these partas are changing as well.
This is the way I will try to prove that one or all of my modules were stolen, hoping that the 'lazy' cracker will not get very deep with his analysis. Yet, my lawyer is not quite happy with my approach. At the same time, I am very happy since I don't find a very good reason for someone to crack my apps, but surely this is not the case for everyone
