I released the paid version of my app two days ago and today I found it on nullapk.com which claims to have "Free full version android apps and games apk downloads". Should I be worried about this (and similar) sites?
I find it hard to believe my app was cracked so quickly? My app is not very popular (yet) so I can't imagine hackers have even noticed it yet, let alone cracked it. I'm using the Google LVL (with obfuscation) for license control.
I would download the app myself to really see if it's cracked but I'm afraid it has simply been turned into a Trojan and I don't want to catch a virus.
Thanks in advance,