Challenges now have a goal and a verdict. "Day 14 of 21" read the same whether
you had kept every day or none of them — a challenge now states what a day has
to contain, counts the days you kept and missed, and is strictly consecutive:
one missed day ends the attempt, and it says which day it ended on and how long
your best run was.

Ten categories instead of six. The four new ones (Exercise, Sleep, Social,
Errands) are off until you switch them on, and every category can now be given
its own colour, which repaints the ring, the pens, the week strip, the
breakdown, the History calendar and the shared image at once.

The History calendar can be coloured by score, by hours logged, or by the
category each day led with.

Reminders you can test: a "Send a test reminder" button and a line saying when
the next one actually lands. If your operating system swallows the
notification, the toolbar icon now shows a "!" instead — drawn by the add-on,
so nothing outside it can suppress it.

Fixed: the daily score is now measured against a target rather than against
itself, so a two-hour day no longer scores 100. Dragging a block could only
ever make it longer. Note marks drifted off their blocks after a resize. The
page scrolled sideways on a phone. The keyboard shortcut had never worked and
is now Ctrl/Cmd+Shift+Y.