Cupola is a native macOS app that brings Apple Calendar, Reminders and Notes together in one window, with all three a hover away in the MacBook notch. Customers download it from trycupola.com and try it free for 7 days. After that they can buy a one-time lifetime license (no subscription) to keep adding and editing items. All user data stays on the customer's Mac. A full refund is available within 14 days of purchase.