I confirm that Poweramp does a license check not only after it is reinstalled, after a system reset (whatever that means), or after a ROM update.
My wife and I are both Poweramp users. I convinced her to purchase the app because I was very satisfied with Poweramp. However, it appears that she was never able to use the app for an entire flight. After some time with the phone in airplane mode, the music player walks out on her saying that the license verification failed. This is not reasonable at all and makes Poweramp look like a scam.
The strange thing is that the failing license che