ReclaimAI - Helps users prioritize their work and personal calendars
Google Calendar - Spend less time managing your day & more time enjoying it
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
CalenGoo - Features | 1.0.175 for Android™
Jorte - Schedule books must be practical and has a good design.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.