I did it.
I pulled the trigger and got premium. This is just for personal use. I cannot state enough how difficult it is to find a calendar app with all the features I want, and I don't think I'm asking for much. I have tried so many...
What sold me:
- Not a USA company
- Full month calendar, with ability to check off tasks within it, as well as tag/colour code
- Can easily put holidays from different countries on your calendar
- Habit tracking. This is a new thing I can't wait to try as I've heard about bullet journaling and I like the concept.
- Pricing is the most reasonable so far
- Multi-platform, including Linux
Hope I'll have no regrets but I think I'll be happy with it. The only other feature I wish to see is creating project boards with tasks/to-do lists that have no dates assigned to them, so they're separate from the calendar. Then this app would truly be all powerful.