What solution did you find?
I honestly don't see the advantage here.
I AM fine with a native app that only works on a single OS. Cross-platform is not necessary, or even desired.
"Doesn't require any installation" doesn't even enter into my evaluation. The last time I cared about that was when my computer didn't have a hard drive.
The UI/UX of Boards is to my liking. Several design choices resonate with how my brain works.
That it stores its data in iCloud is to my liking.
That it doesn't require a browser is to my liking.
The point is that GP posted a free, offline first, cross-platform, good looking tool and OP commented saying 'well, this isn't what I'm looking for' like HN is their own personal wishlist, and then eventually finds what they're looking for, and it's not free, it's not cross-platform.
In this case, my original comment was too succinct to be useful to anyone else, which I believe is your point. Correct me if I'm wrong on that.
It looks like you see and acknowledge that opinion, which is nice, and fairly uncommon on the Internet still :)
Hope you have a good weekend and a wonderful Christmas - and it's good you found a tool that does fit your needs in the end!
Not immediately obvious, but nice to know: the *.boards file format is simply a .zip file. It contains all resources/images and an HTML file with the contents of the board so that you can access your data even without the app (I'm strong on data accessibility after getting locked out of binary data formats once too many).
Is there a public roadmap anywhere? I'd love to be able to add colored tags/labels to individual items.