Once we have deployed our app, we won't be able to use the Xcode debugger tool to debug it. Our only aim should be to improve the customer's experience with your application. This involves fixing the application crash as soon as possible. This can be achieved by analyzing crash logs to debug the problems.
Every build of an app can have multiple crash reports and each crash report contains multiple crash logs, Apple's crash reporting service collects all the crash logs and groups similar crash logs into separate crash reports. The crash logs are collected by Apple only if the app user agrees to share crash data with the app developers. The Apple crash report service collects crash logs from apps running on user devices.