Interesting. I have spatial sequence synesthesia [0] and number form synesthesia [1] and this feels a little weird to look at. It disagrees with my mental model of dates. But that's just me.
It's very hard to describe as it's a structure that exists in my "mind's eye" and difficult to understand it. In fact, what I am about to write will probably sounds a bit bonkers.
I am able to switch to different views depending on the scale. For instance, when thinking about the week I see one thing than when I think about a period spanning years.
The week-view is very much linear at the start of the week but something weird happens near the weekend - it kind of twists back to the start - I can see the following week when I am thinking about Saturday or Sunday.
The yearly-view does a similar thing around winter and spring. The depiction on your site is actually somewhat representative of the general shape - if you take it and twist it a bit in 3D space you kind of get to what I see.
I realise all of this sounds insane haha. I honestly didn't even know it was a thing until a few years ago when I happened to read about it.
Anyway, cool project, I hope it takes off. My only feedback would be that the minimalist website design makes it a little hard to parse information (especially the pricing screen).
I think linear layout lets you use your excellent visual cortex for planning, freeing up your consciousness to focus on the tasks at hand. It also has notes and tags
Brutally honest feedback is welcome. I'm also looking for early adopters. Integration with Google Calendar is on top of my dev stack.
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[0] https://en.wikipedia.org/wiki/Synesthesia#Spatial_sequence_s...
[1] https://en.wikipedia.org/wiki/Synesthesia#Number_form