How do you delete an app which cannot be deleted?

To delete an app that cannot be easily removed, first check if it's a pre-installed system app by going to your device's settings. If so, you may be able to disable it instead of deleting it. For apps that you can't delete or disable, consider using a third-party app management tool, or if you're on Android, you can access "App Info" and clear data/cache to minimize its impact. Lastly, for iOS devices, you may need to explore options like jailbreaking, but this can void warranties and is not recommended.