A good rule of thumb is that if only the user "knows" something, it can be cracked & hacked. I'm sure that if a similarly-protected app (no server-side checks)

A good rule of thumb is that if only the user "knows" something, it can be cracked & hacked. I'm sure that if a similarly-protected app (no server-side checks) is there on Android, one would be able to crack it with some work. Sure, one may argue that it's harder on Android - but that's besides the point (and the trade off between power and locked-down-ness) I haven't done mobile dev - are there any built-in DRM features that developers can use?