When comparing SmartDay vs Fantastical 3, the Slant community recommends SmartDay for most people. In the question“What are the best calendar apps for Mac OS X?” SmartDay is ranked 7th while Fantastical 3 is ranked 16th. The most important reason people chose SmartDay is:
The app doubles as a task manager and allows dragging and dropping tasks into the calendar on specific days. If a task does not get completed on that day, it automatically gets rescheduled.
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Pros
Pro Integrates task-management with the calendar
The app doubles as a task manager and allows dragging and dropping tasks into the calendar on specific days. If a task does not get completed on that day, it automatically gets rescheduled.
Pro Aims to provide a complete organizational solution
The app includes a way to manage tasks, take notes, set reminders and manage project from within the calendar.
Pro Calendars can be shared
Pro Amazing usabiliy
It has a neat design and gives a great overview on events of a day. Adding and removing events is easy.
Pro Joining Conferences via context menu or hyperlink in event on calendar
You are late and you have to join a call, you want to be fast.
Pro Integration of Google Meets when creating events
Cons
Con it's not free
not as pricey as others, but still not free.
Con Doesn't integrate
Does not support Google Calendar integration.
Con Support is limited
The app support is confusing and hard to navigate.
Con Lacks natural language input
Natural language input allows creating events in the same way if you had to tell it to a friend. Writing something like "Lunch at 2pm" would add an event called "Lunch" at 2 PM. SmartDay lacks that functionality.
Con Yearly subscription
Even though you might also use cardhop, subscription based models are unpopular.