Application Not Responding (ANR) errors are significant disruptions to an app's user experience, akin to crashes, as they cause the app to become unresponsive to user input for over five seconds or prevent a broadcast receiver from completing its execution within ten seconds. These errors prompt the operating system to inform users about the app's unresponsiveness, offering them the choice to either force-quit the app or wait for it to recover, with many users opting for the former. ANRs can be caused by various factors, including executing slow code or I/O operations on the main thread, mismanaging lock states, deadlocks, and slow broadcast receivers. To mitigate these issues, developers can employ strategies such as running heavy workloads on worker threads, managing resource locks carefully, and using broadcast receivers for light tasks. Tools like Luciq Crash Reporting can help detect and analyze ANR errors by providing detailed reports with console logs, network logs, and device state profiles, aiding developers in identifying and resolving underlying issues efficiently.