When comparing Fantastical vs Tasker, the Slant community recommends Tasker for most people. In the question“What are the most useful Android phone apps?” Tasker is ranked 12th while Fantastical is ranked 19th. The most important reason people chose Tasker is:
Tasker has an impressive amount of triggers, actions, and parameters that can be used together in an incredible variety of ways. It can even accept scripts to follow instructions.
Specs
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Pros
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
Pro Infinitely tweakable
Tasker has an impressive amount of triggers, actions, and parameters that can be used together in an incredible variety of ways. It can even accept scripts to follow instructions.
Pro Create powerful custom applications
Tasker has the ability to create custom applications, effectively replacing multiple installed apps in your phone with tasks that are triggered automatically. What's even better is that they will be custom tailored to fit your specific needs.
Pro Can adjust system software
With Root access it can also dabble with system software which other apps are not likely to achieve at the moment.
Pro Export tasks as standalone apps
Tasker allows exporting workflows you've created as standalone applications that can then be shared or even put on the Google Play store.
Pro Awesome plugin support
Tasker has awesome plugin support to connect with hardware that usually requires installing specific apps. For example, it has a plugin for Pebble smartwatch so that you can automate tasks that require using Pebble.
Pro Purchase only once
The dev does not keep bringing out revised apps expecting you to pay each and every time; the same app has been developed consistently for nearly a decade.
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.
Con Awful user interface
While it's incredibly powerful, Tasker's user interface is counter-intuitive, confusing, and just plain clunky at every turn.
Con Steep learning curve
Tasker lacks good documentation or tutorials, which is important as the learning curve is very high if you want to use its advance features where this app actually shines.