I would like to create my simple custom crash handler in swift to catch all my crashes or uncaught exceptions and save it locally, when user opens the app again, will send to server via service.

could you please suggest the best approach, best practices or any articles to achieve this?

Thanks in advance

You can set a handler to process exceptions with NSSetUncaughtExceptionHandler like below

NSSetUncaughtExceptionHandler { exception in
  // Implement your handling logic
}

@jannisnikoy : it catches only objective c exceptions