Relay ME, Unlocker (com.tinywebgears.relayme.unlocker) on Google Play
This is handy when you can't get Relay ME on your device directly from Google Play or are having problems with in-app billing. You can download it from somewhere else and activate all the features using this unlocker app. Unlike the old pro app/unlocker it doesn't require special permissions and is installable on all Android devices running Gingerbread and above.