ADHD focus timer
The ADHD focus timer starts with shorter blocks than the usual Pomodoro: 15 minutes of focus, a 5-minute break, and a 15-minute break after every 4 rounds. The tomato on the page fills as the minutes pass, so you can see progress without reading digits, and brown noise plays by default because many people with ADHD report that a low, steady sound makes it easier to stay with a task. All of it can be changed, but the first setting is a reasonable one.
It suits people who find that a 25-minute block looks like a wall, and would rather promise themselves 15 minutes, then decide again. Ending a block on purpose, before attention runs out, tends to make the next start easier. If 15 minutes feels too short once you are moving, the 25/5 and 30/10 timers are one step up, and the 5-minute timer is one step down for days when even starting is hard.
Skip the fixed intervals on days when you have found a good stretch, because a chime pulling you out can cost more than the break gives back. This is a timer, not a treatment, and nothing here is advice about ADHD itself.
Questions
what is the best pomodoro length for ADHD
There is no single answer. Many people with ADHD find 10 to 20 minutes easier to commit to than 25, which is why this timer starts at 15. Others do better with long blocks once absorbed. Try a few lengths over a week and keep what you finished.
why is brown noise the default on the ADHD timer
Because many people with ADHD say they prefer it: a deep, constant rumble that covers small distractions without the sharp hiss of white noise. It is a preference reported by users, not a treatment, and it is easy to switch off.
what if I hyperfocus and do not want to stop at the chime
Then keep going. A timer is a tool, not a rule. Some people use the chime only as a check-in to drink water or stretch, then return to the task. Set longer blocks or the silent option if the interruption costs more than it gives.