Android Question need to log crashes in accessible file

I searched for info on this but did not find a definitive answer.

I have a production app that works fine on my end but crashes on start for some users in the field. Of course, I cannot duplicate this on my end.

How can I create a log file on the remote device that logs all exceptions (reasons for crash) that the user can locate and send to me?

I can compile in debug mode and temporarily distribute the app for debugging purposes.