Get your heart and brain in sync.

Decode your resonant breath rate. A few minutes at your pace brings heart and brain into coherence: clear, calm focus, sharper decisions and a steadier response to stress.

Coming soon to the App Store See what happens
No account needed Just your phone No ads

Stress knocks your body out of rhythm.

Your heart, breath and brain stop working together. You feel it before you can name it.

Stressed
  • Wired all day
  • Can't switch off
  • Short fuse
Coherent
  • Calm
  • Clear
  • In control

What happens inside you in coherence.

One slow pace sets off a chain reaction from your lungs to your brain.

You breathe at your pace

Coherence decodes your resonant rate, usually 5 to 7 breaths a minute. The orb sets it.

Your heart follows

It speeds up as you inhale and slows as you exhale, in one smooth wave.

The calm nerve fires

Your vagus nerve carries a steady "you're safe" signal up to your brain.

Your brain settles

The parts that handle stress and emotion quiet down and work together.

Calm but alert Steadier under pressure Easier to switch off

Based on Lehrer and Gevirtz (2014), Mather and Thayer (2018), Goessl et al. (2017).

Calm shouldn't need a lab, a login or a subscription.

So we put decades of heart rhythm research into one app that decodes your pace.

~6breaths a minute is where most hearts and breath line up. Coherence finds your exact rate.
24studies in one review found a large drop in stress and anxiety.
0accounts required. Your data stays on your phone.

Three steps to calm.

Open the app

No sign-up needed. Tap breathe.

Follow the orb

In as it grows. Out as it shrinks.

Feel the shift

Watch your rhythm smooth out.

Everything you need to breathe better.

Resonance finderYour best pace
Box breathingFocus and reset
4-7-8Wind down for sleep
Wim Hof styleEnergizing rounds
CO2 toleranceBuild breath control
HRV readinessPush day or easy day
BOLT testBreath-hold score
Breathing checkSpot over-breathing
Breathe togetherSync with a partner
Your own patternBuild any rhythm
Optional sensors: Phone cameraPolar H10Any heart-rate strapMuse headbandApple Health
TOGETHER You · Sam

Breathe in sync with someone you love.

Send a link. Breathe to the same pace, anywhere. The ring turns gold when you're both in coherence.

Stop running on stress.

Left alone, stress follows you into your sleep, your focus and your relationships. A few slow minutes can turn it around.

Coming soon to the App Store
No account needed Data stays on your phone No ads