Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Bragi - Wireless, H2O resistant, noise-canceling in-ear tracker.
BusyCal - powerful calendar app for macOS
Apple - Available on iOS
Google Calendar - Spend less time managing your day & more time enjoying it
DJI Fly - DJI Fly is an app that provides you an intuitive interface and helps you to discover GEO zones and scenic flight locations nearby you effortlessly.