Note: Blackthrob app is not available on Google Play yet, follow the steps to install the app on your Android device :

1. Download and open the .APK file : Black Throb Android APP
2. A dialog box will appear click Settings.
3. Go to Security > Device Administration > Turn on “Unknown Sources”.
4. Navigate to Downloads Manager and re-open the .APK file.
5. Proceed and complete the installation.