Brown noise for studying

Brown noise is a deep, steady rumble, like a distant waterfall or heavy rain on a roof. It has more bass and far less hiss than white noise, which is why many people find it easier to listen to for hours.

Press Start and it plays under a 50 minute focus round while the pup naps beside you. No ads, no sign-up, and the loop never breaks.

Brown, white or rain?

White noise is an even hiss, brighter and sharper. Brown noise is deeper and softer. Rain sits in between, with a little texture. All three are in the green Nature mix with their own sliders, so you can blend them: try brown noise with a little rain on top, or switch to white noise.

Does brown noise help you focus?

It depends on the person. A steady sound masks sudden noises like voices, doors or traffic, which are often what break focus. Research on noise and attention is still small and mixed (here is what it says), so the honest answer is to try a few rounds and see how you feel.

How it works

Pick 10, 25, 50 or 60 minutes (or tap the minutes and type any length up to 2 hours), then press Start. The pup settles in to sleep.

Keep this tab open while you work. If you are away for more than 10 seconds the pup wakes for a peek; the timer keeps counting, but the round earns one biscuit fewer.

When the round ends the pup stretches and you earn dog biscuits: 1 for 10+ minutes, 2 for 25+, 3 for 50+. The jar holds up to 99.

Records

Records are seamless loops you can play under your focus. Rooftop Set and Night Ferry are free, and two more can be unlocked on the web with 4 biscuits each. The rest, from math rock and cool jazz to deep house and Ethio-jazz, have previews here and live in the app.

The green Nature mix record plays ten looping nature sounds you can blend with sliders: rain, waves, campfire, thunder, crickets, snowy wind, café, turning pages, a pool and deep space.

On iPhone, Apple Watch and Android

The Pupmodoro apps add a Lock Screen Live Activity and Dynamic Island countdown, a gentle chime when a round ends, every record and every scene, outfits for your pup, a weekly and monthly journal, focus rounds from Apple Watch, and sync across devices. They are a subscription with a 7-day free trial; the web version stays free.

Sleep log

Every round lands in the Sleep log: today's rounds on a little timeline, and this week as crayon bars with the biscuits you earned each day.

Questions

Is it real brown noise?

Yes. Its energy falls by 6 dB per octave, which is what makes noise brown, with the inaudible rumble below 20 Hz taken out. It loops without a seam.

Does the noise stop when the timer ends?

No, it keeps playing until you turn it off, so a long session isn't interrupted. The chime and the pup waking up tell you the round is over.

Is Pupmodoro free?

The web version is free with no sign-up. The iPhone/iPad app (with Apple Watch) and the Android app are a subscription with a 7-day free trial on the yearly plan: $29.99 a year, $4.99 a month, or a one-time $49.99.

Does the timer keep running if I switch tabs?

Yes. The countdown never pauses. Being away for more than 10 seconds only wakes the pup and costs the round one biscuit.

Do I need an account?

No. Your biscuits, records and sleep log are saved in your browser. Sign in with Google only if you want them on your other devices and in the app.

What is the music?

Original instrumental loops made for Pupmodoro: lo-fi, neo-soul, bossa nova, cool jazz, deep house and more, with no vocals.