I am using Mobizen as my Android screen recorder in case something goes wrong I will have video of the readings and the last Lat Lon to begin my search should I experience a crash.  What app does most drone pilots use for Android Screen recording?  

Thanks this one is pretty good might use it as my main one. I was using AZ Screen Recorder seems like Mobizen has a lot of ads.

Try to use the latest version of this mobile screen recorder app...

AZ Screen Recorder, you might have to pay for advert removal, but yes, very capable screen recorder that does not over hit you with adverts in the free version, they are quite fair to be honest, it's me that hates adverts on apps, always have & always will.
Here is a link to it on the Google Play Store
https://play.google.com/store/apps/details?id=com.hecorat.screenrecorder.free

EDIT : Forgot to add link so that is reason for quick edit.