For a not so experienced user, that knows little about car mechanics (and probably will not make use all of the info that Scanauge can give) wouldn't it be wiser to save the extra money and just get an application for his smartphone that can be trustworthy and right/correct in giving output info? Are there such android apps for the mini?
This thread http://www.motoringalliance.com/forums/car-entertainment-nav/18097-rev-dash-command-another-app.html#axzz2bZdCINMI has some discussion on Android apps as well as iOS apps that can be used. Keep in mind you will need another hardware device to plug into the OBII port to communicate with your Android device too.
http://www.motoringalliance.com/forums/car-entertainment-nav/18097-rev-dash-command-another-app.html#axzz2bfzQw8Kc
Being andAndroid device the Torque app would be your best bet I think. Torque — OBD2 Performance and Diagnostics for your Vehicle You can find a listing of both wireless and wired devices that you pair with the phone to see the data at Bluetooth Adapters - Torque OBD2 Wiki