Appears to be abandoned by developer

This app is no longer being supported. And it’s broken so there’s no hope of it being fixed. It won’t let me set an alarm time. The link to the Realmac support on the App Store is dead. The Realmac website doesn’t even mention Clear anywhere. Save your money.

Tdavidhopkins about Clear – Tasks, Reminders & To-Do Lists, v1.1.7