# Detecting and fixing Crashes in watchOS apps.

## What are Crashes in watchOS apps?

A crash refers to an unexpected termination of an app that results in the app stopping its execution abruptly. When an app crashes, the user is typically presented with a message that indicates the app has stopped working, and the user may be given the option to either force stop the app or send a crash report to the app's developer.

## Reasons for Crashes in watchOS apps

Crashes in watchOS apps can occur for various reasons, including Mach Exceptions, Signals, Objective-C Exceptions, and NSExceptions.

- **Mach Exceptions:** These are low-level exceptions that occur when a process attempts to execute an illegal or unsupported operation.

- **Signals:** Signals are software interrupts that are sent to a process when it encounters a critical error. SDK can detect and report signals such as SIGSEGV (segmentation violation), SIGBUS (bus error), and SIGABRT (abort signal).

- **Objective-C Exceptions:** Objective-C exceptions occur when an object sends a message to an invalid recipient or when an attempt is made to access an object that has been deallocated. SDK can detect and report Objective-C exceptions.

- **NSException:** NSException is a higher-level exception that can occur in Objective-C code. SDK can detect and report NSException crashes.

## How do we use the information in the screenshot to fix Crashes in watchOS apps?

The issue report will contain the name and reason for the crash, along with a stack trace. The stack trace will help developers identify the root cause of the issue.