How to use the online timer
The Pomodoro technique is built on a simple trade: short, fully protected bursts of focus in exchange for genuine breaks, rather than one long stretch of half-attention spread across an entire task. The classic twenty-five-and-five split is the best-known version, but the underlying idea scales — a longer fifty-and-ten split suits work that takes real time to sink into, while a fully custom ratio lets the rhythm bend to whatever task is actually in front of you.
What makes the technique work isn't the specific numbers so much as the discipline around them: full attention during the work block, with notifications off and the task decided in advance, and a genuine step away from the screen during the break rather than a shorter version of the same distraction. Four rounds is the traditional unit before a longer break resets things properly.
Pick the split that suits the task at hand, start the timer, and treat the buzzer as a hard stop in both directions — work as much as break.