Is Poweramp Equalizer purchase per device or per account?

Play purchase (Premium) is per Google account. This means app can be used on multiple devices as long as devices have your Google account:

  • please ensure proper Google account is registered on your phone and selected in Play app.
  • use Poweramp Equalizer Settings / Restore Purchase / Google Play

Website purchase is per single device. You're free to upgrade / reset / reinstall app on this device, or upgrade the device itself. If app is used on the multiple devices at the same time, activation will stop working.