One special feature. https://www.guidingt...cal-2-calendar-sets/
Right now only on a Mac ($50 and you need a Mac) not yet on the $10 + $7 likely needed upgrade on the iPad version. I am writing this on a 12.9 iPad Pro.
Sort of like flexible overlays, well implemented.
Note that you can also be in sync with the google calendar (and other) which can help a lot. Of course, google won't know the sets.
Who in Windows or iOS has stuff comparable to these sets?
This can be a calendar or pim/calendar.
Needed: a power users and help to newbie forum for major app/programs like Fantastical and Wunderlist and miscellaneous.