And they're a little right. You haven't got it tuned for MCU yet. Many people have problems with the app and you are asking outrageous money for it. The application on px5 drops to statusbar after booting. Although it plays, but the radio itself can not be recalled and repeated messages about closing the application and reporting an error. Nice idea with radio, but don't ask money until it works. and please return my money back. I also wrote to you on google play about this. I will not annoy the application for the 10th attempt after 10km to start the radio ..
It's not true that many people have problems just because you have it.
The other guy who gave 1star on playstore saying that it doesn't work have installed the old version 1.14 that was without MTC support.
We discussed it and fixed the problem privately, now he promised to change his review there.
I own 3 px5 units, many people already have tested and purchased it and the app boot correctly on px5.
Are you sure that you have an MTC device?
If the app don't even start then probably you don't have a compatible device. Please post a picture of your system information screen.
I can refund you the money if you tell me your purchase number without any problem.
You also could asked the refund straight away to google.
Anyway these kind of things should be discussed privately.
I'm here to solve the problems but without any information about the crash I cannot fix them and you are not providing me any information.
Anyway a FREE version of the app is coming soon for xda users, so everybody can test compatibility before purchasing it.