SDR Touch
RedCarpet

Available at Amazon Get it on Google Play

Get the red carpet treatment for your SDR experience! Unlock the full potential of your Android device and use the pro features of SDR Touch. You will get:

How does it work:
You need to have SDR Touch already installed on your Android powered device. Purchase and install SDR Touch Key. Next time you start SDR Touch you will be able to use the pro tools and the "DEMO MODE" will have disappeared!

It is highly recommend to install SDR Touch first to check whether it is compatible with your USB dongle, phone or tablet.