When comparing Trello vs Fantastical, the Slant community recommends Fantastical for most people. In the question“What are the best scheduling/calendar apps that syncs across desktop and iOS/Android?” Fantastical is ranked 10th while Trello is ranked 11th. The most important reason people chose Fantastical is:
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.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Share individual events (tasks/projects/meetings)
You can easily and automatically create a stand-alone webpage for every single event. Add all the details for the event, then share the event page link with anyone who needs to help/be part of it. You can use comments to discuss details on the event page. Easy, free, makes it easy to collaborate on individual tasks or projects without a big setup.
Pro Powerful calendar
Integrate schedule with your task management --- because if you don't know when you're going to do it, are you ever going to?
Pro Small, dedicated team
Boot-strapped company, run by the original founders/developers, fully committed to supporting and improving the product over time. Over 3 million users currently
Pro Scalable
Works well for individual/personal work, free plan is more than adequate for this or for running a small business. Easy to scale if needed, paid plans available.
Pro Free mobile apps
For both iOS and Android. Free, fully functional.
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.