Just been looking at the Microsoft developer center and I checked the "Health" of a recently released application. Unfortunately it's not a nice sight with around 800 crashes in the last 30 days. What's even worse is 95% of these crashes are marked as "Unknown" with no stack trace or any information to help with sorting out the issue. See screenshot below:
What can I do about this, I need more information to try and fix any crashes there are in the app?
To get more information, you could upload your app to Hockey app, which can help to manage testers, distribute apps and collect crash reports.
The servers of Hockey App could provide more powerful crash analytic report which can give you meaningful stack traces with class names, methods and accurate line numbers.