Pomodoro timer

A Pomodoro timer with focus sounds built in

Pick an interval, pick a sound, and let the countdown sit on your Lock Screen while you work.

Solbox is a Pomodoro timer for iPhone with focus sounds built in. Choose 25/5, 50/10 or 90/20 (or your own intervals with Pro), start brown noise, café ambience or a binaural preset, and the countdown runs as a Live Activity on your Lock Screen and Dynamic Island, with a gentle chime between blocks.

Download on the App Store

Free on iPhone · iOS 17.6 or later

Pomodoro presets

Three popular rhythms, plus your own. Solbox runs four cycles by default.

Classic

Free

25 / 5

The original Pomodoro: 25 minutes of work, a 5-minute break. Good for starting tasks and for days when focus is short.

Extended

Free

50 / 10

Longer blocks for writing, coding or study, once you are warmed up. Ten minutes is enough to stand up and reset.

Deep work

Free

90 / 20

One long block that matches a natural work cycle, followed by a proper break. Best for your most demanding task of the day.

Your rhythm

Pro

Custom

Set work from 5 to 120 minutes and breaks from 1 to 30 minutes. Solbox runs 4 cycles by default.

What is the Pomodoro technique?

The Pomodoro technique splits work into short, timed blocks with a break after each one. The classic version is 25 minutes of work and 5 minutes of rest, repeated four times, followed by a longer break. It was popularized by Francesco Cirillo in the late 1980s and named after his tomato-shaped kitchen timer.

The idea is simple: a block with a clear end is easier to start than an open afternoon. You only have to focus until the timer rings.

Why pair a timer with sound?

A timer tells you when to stop. Sound helps with how to stay in the block. A steady background noise covers small distractions like voices, traffic or the hum of a fridge, and it becomes a cue: when the brown noise starts, it’s work time.

That’s why Solbox puts both in one tap. Press Focus, and your sound, your volume and your timer start together.

How to set up a Pomodoro in Solbox

  1. Open Solbox and tap the timer.
  2. Choose Focus mode and pick 25/5, 50/10, 90/20 or a custom rhythm.
  3. Pick a sound: a noise color, a body doubling ambience, a soundscape or a binaural preset.
  4. Start. Lock your phone and get to work; the countdown stays on the Lock Screen.

When a block ends, a gentle chime and a notification tell you it’s break time, and another one tells you when the break is over.

Which interval should you choose?

Start with 25/5, and lengthen the block only when the bell starts to feel like an interruption rather than a relief. The full comparison of 25/5, 50/10 and 90/20 is in our guide to the Pomodoro technique for ADHD.

Sounds that work well in a Pomodoro

  • Brown noise for long, deep blocks.
  • Pink or green noise if brown feels too heavy.
  • Coffee shop or keyboard typing if you work better with people around.
  • Deep Focus, an 18 Hz beta binaural preset, if you like to experiment with beats.

Keep the volume low: background sound should be easy to forget, not something you listen to.

Solbox playing brown noise with the timer open in Focus mode and the 25/5, 50/10, 90/20 and Custom presets.

Pomodoro timer: common questions

What is the best Pomodoro interval for ADHD?

Many people with ADHD start with 25/5 because a short block feels easier to begin, then move to 50/10 once they are warmed up. The best interval is the one you will actually start, so treat the presets as experiments, not rules.

Does the timer keep running when I lock my iPhone?

Yes. The countdown keeps going in the background and shows as a Live Activity on the Lock Screen and in the Dynamic Island, with pause, resume and stop buttons.

Can I use a Pomodoro timer and listen to music at the same time?

Yes. The timer works with any Solbox sound, and with Solbox Pro, Backdrop mode lets Solbox keep playing alongside Spotify, YouTube or a podcast.

Can I change the work and break lengths?

The 25/5, 50/10 and 90/20 presets are free. With Solbox Pro you can set work blocks from 5 to 120 minutes and breaks from 1 to 30 minutes.