Offline and account-less notes and calendar apps for iOS [closed]

Are there any calendar and notes apps for the iPhone (iOS 12.4) that don't require syncing, cloud use, or an account with a supplier? I have not been able to find any, but I hope some exist.


The 'Notes' app should work fine in a stand-alone mode. Its included with your iPhone. And I think the iPhone Calendar should not have any requirements either but I assume you've tried it.