A focus timer turns "I should work" into a decision with edges: this task, this many minutes, then a break. The countdown gives the session a shape your brain can commit to, and the break at the end makes stopping safe — which, paradoxically, is what makes starting easy.
This one runs entirely in your browser: pick an interval — classic 25/5, long-form 50/10 or anything custom — write the task down, press start.
