Quality is delighting customers
Assuming it is form and when user clicks on Save button then app crashses
1) Know the Pattern : We should be cautious which input data is causing for crash and this way we will come to know the scenario
2) Check the Log : Before doing action/transaction - open a log in 'tail -f' then perform action/transaction - if it is crashed then check the log, read it if you can it and then send the log to developer.
I hope this will help you !
Thanks Dhanraj !