What should be the last resort for troubleshooting an unresponsive app?

Performing a factory reset is considered the last resort for troubleshooting an unresponsive app because it involves restoring the device to its original settings and erasing all data, apps, and preferences. This step is significant because it can resolve deep-seated issues that may be affecting app performance, including software conflicts and corrupted data.

Typically, simpler solutions are attempted first, such as reinstalling the app or restarting the device, as these methods can often resolve issues without the need for drastic measures. Contacting the app developer is also a viable option for obtaining support or reporting a bug, but it usually happens earlier in the troubleshooting process, especially if the issue is suspected to be with the app itself.

Given that a factory reset results in complete data loss and requires more time to set up the device again, it is only justified after all other troubleshooting avenues have been exhausted and no other solution has proven effective.