@anderslund Oh yes, I did notice the contrast but that too was very hard to distinguish. I'm using the Breeze Dark system theme on KDE. It doesn't help that colours and contrasts are also monitor/screen dependent which makes things very tricky of course!

I also have old eyes.

@anderslund Nice! I just tried it out in tablet mode on my Tuxedo InfinityFlex (a 2-in-1). Works really well. I tried Simple mode which was a lot harder than I expected. Maybe I'm getting worse at this.

Anyway, I was wondering if you might want to make the lines thicker between the big blocks. I often found it hard to see which subblock I was in.

I think I also found a graphical glitch where it looks like a number is wrong even though it isn't.