I just published the free 5 minute trial of FlightMap to the Play Store. It's already showing up in the US store so it should be soon for other locations. The direct link to it is:

https://play.google.com/store/apps/details?id=com.vrs.flightmap.trial

The trial is fully functional and is tied to the server updates. Once everything is working it will get 5 minutes of server updates before the trial expires. You can re-open the trial as many times as you want.