Libertas secure tablets are now shipping with Avare ADS-B software installed. This allows you to track aircraft in your AO in real time. You just need to plug in a RTL-SDR USB attachment with the included adapter and you are in business.
Current Libertas owners can install the app from the CSG store in Aptoide.
Note* The map function will not work as it relies on Google maps (Libertas blocks all Google framework), however it does provide the data readout which is what matters in this case.