When comparing Morgen.so vs Fantastical, the Slant community recommends Morgen.so for most people. In the question“What are the best calendar apps for Mac OS X?” Morgen.so is ranked 5th while Fantastical is ranked 15th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports general CalDAV calendars
Pro Google synchronization
Connects to your Google accounts via OAuth.
Pro Easy to setup
Connecting to service accounts (such as Exchange) is easy and straightforward.
Pro Natural language
It supports interaction using natural language (English). For example "Schedule a meeting with John tomorrow at 11".
Pro One-click installation
First installation and updates are done with only 1 click.
Pro Supports Exchange calendars
Including Exchange, Outlook.com and Office 365 accounts.
Pro Free
Totally free and in active development.
Pro Supports multiple calendar platforms
If you're locked into using an Exchange account, Google Calendar won't work without 3rd party syncing options. Fantastical works flawlessly with Exchange and with Google Accounts so you can have both. It also supports iCloud, Office365, Yahoo, and Facebook calendars.
Pro Fantastical can comprehend natural language
You can copy and paste a line from a meeting note and Fantastical can copy down and present the relevant information
Pro Beautiful and highly polished design
Cons
Con Expensive for a single utility app
Fantastical on OS X costs $49.99 and an additional $4.99 if you want to use it on iOS.
Con Only supports iOS and OSX
Fantastical doesn't support web, Windows or Android.