This is a simple webapp slapped together when I was trying to track three things: encounters while catching shiny Pokemon, meditation sessions, and work/rest sessions.
Yes, I'm aware that there are tons of these out there - but this one is mine and I can use it anywhere.
Use the edit buttons to add/remove/edit trackers and timers. The trackers will shift in color based on progress, and you can set an interval for a meditation bell ring to occur using under timing settings.
Gemini 3.0 was used in part during development of this work.