Haptic breathing

Breathe with your eyes closed. Your wrist keeps the time.

Vayu turns each breath phase into a distinct pattern of taps on your Apple Watch or Wear OS watch. A ramp that slows down means inhale, a ramp that speeds up means exhale, a soft click each second means hold, and a short silence marks the boundary between breaths. No screen to watch, no audio to play, no phone in your hand.

After each session Vayu reads the heart rate variability your watch recorded and uses it to shape the next one. It does not measure HRV during the session and the pacing does not change mid-session. That honest split, real-time haptics and post-session HRV, is what makes practice possible with your eyes shut.

Get Vayu freeLast updated: September 26, 2026

68+

Wear OS models supported

Haptic textures per session: inhale, hold, exhale, silence

199

Participants in the naturalistic pilot

70,000+

Downloads across both stores

What is haptic breathing?

Haptic breathing is guided breathing where the timing of each breath arrives as vibration on the wrist rather than as a shape on a screen or a voice in your ear. You feel when to inhale, when to hold and when to exhale. Because nothing has to be seen or heard, the practice works with your eyes closed, in a dark room, in a meeting, or on a train.

The difference from a simple vibrating timer is texture. A single buzz at each phase change tells you that something changed but not what. Vayu gives every phase its own feel, so after one session you can tell inhale from exhale without thinking about it.

How does Vayu's haptic pattern work?

Inhale: a ramp that slows down

A run of light pulses starts quick and spaces out as your lungs fill, scaled to the length of the inhale. For a four-second inhale that is roughly a pulse every 150 milliseconds at the start.

Exhale: the mirror ramp

The exhale starts slow and speeds up as the breath empties, so the direction of the ramp tells you which way the breath is going even with your eyes shut.

Holds: one click per second

During the holds in box breathing and 4-7-8, a soft click lands each second so you can count without looking. A fixed-cadence timer cannot do this.

Between breaths: silence

The boundary between one breath and the next is a short gap, not another texture. On the wrist a gap reads more clearly than any extra tap. For Cyclic Sighing, the second short inhale arrives out of that silence as one firm knock and a brief burst.

The session ends with a single tap. On Wear OS the same design is delivered with vibration waveforms.

Can you breathe with your eyes closed?

Yes. On Apple Watch and Wear OS the whole session runs on the watch, so the phone can stay in a bag or another room. Vayu asks nothing of your eyes or ears during practice. People use it at night to fall back asleep without lighting up a screen, between patients on a ward, and in the ninety seconds before a difficult call.

If you prefer to see the breath, the phone and watch both draw the pattern too. The haptics are the guide; the visuals are optional.

Does Vayu read HRV during the session?

No, and the distinction matters. Vayu reads heart rate variability (SDNN, the figure Apple Health reports) from your watch after each session and uses it to shape the next one. It does not take an HRV reading during the session and it does not change the pacing while you breathe. Heart rate can be shown on the watch during a session, but that is heart rate, not HRV.

In a naturalistic pilot of 199 adults over four to six weeks, median HRV rose +28.6% and resting heart rate fell −7.4 bpm among the roughly 29% who sustained three or more sessions a week. There was no control group, so treat this as an association, not proof of cause. The preprint is on medRxiv and under peer review; the full method is on the pilot study page.

Which techniques have haptic guidance?

Box breathing (4-4-4-4), with clicks through both holds
4-7-8 breathing, with a seven-second counted hold
Cyclic Sighing (3-1-6), two inhales and one long exhale
Extended Exhale and custom ratios you set yourself
Anulom Vilom, Bhastrika and Kapalbhati

Which watches support it?

Apple Watch

Series 6, 7, 8, 9, 10, Ultra and Ultra 2
SE (2nd generation)
watchOS 10.6 or later

Wear OS (68+ models)

Google Pixel Watch 1, 2 and 3
Samsung Galaxy Watch 4, 5, 6 and 7
Fossil Gen 6 and later, Wear OS 3.0 or later

Vayu does not support Garmin, Fitbit, Oura or WHOOP. See the Wear OS page for the full model list.

How does Vayu compare to WatchBreath, Breathe Collection and Apple's Breathe app?

What each app advertises as of September 2026. Where a feature is not stated on the app's own listing it is marked "not advertised" rather than assumed absent.

App	Runs on the watch	Haptic pattern	Techniques	HRV
Vayu	Yes, Apple Watch and Wear OS, phone can stay in your pocket	Distinct ramp for inhale and for exhale, one click per second on holds, silence between breaths	Box, 4-7-8, Cyclic Sighing, Extended Exhale, self-designed ratios, Anulom Vilom, Bhastrika, Kapalbhati	Read from the watch after each session to shape the next one
WatchBreath	Apple Watch app	Advertises distinct inhale and exhale haptics for eyes-closed practice	Not advertised	Not advertised
Breathe Collection	iPhone-first; a standalone watch app is not advertised	Advertises haptics for inhale, hold and exhale with soundscapes	Multiple patterns and soundscapes	Not advertised
Apple Mindfulness (Breathe)	Built into watchOS	Gentle taps on the inhale at a fixed, adjustable breaths-per-minute cadence, no holds	One breathe session	Recorded separately by the watch; not used to shape sessions

How to start a haptic breathing session

1
Install Vayu on your phone
Download Vayu from the App Store or Google Play. The watch app installs alongside it on Apple Watch and Wear OS.
2
Pick a technique
Choose Box, 4-7-8, coherent breathing, Cyclic Sighing or a pranayama from the Breathe section, or build a custom ratio.
3
Start on the watch and close your eyes
Tap start. A fast-to-slow ramp of pulses means inhale, a slow-to-fast ramp means exhale, and a soft click each second means hold.
4
Finish and let the watch read your HRV
A single tap marks the end. Vayu then reads the HRV your watch recorded and uses it to shape your next session.

Frequently asked questions

What is haptic breathing?

Haptic breathing is guided breathing where the timing of each breath is delivered as vibration on the wrist instead of a moving shape on a screen or a voice in your ear. You feel when to inhale, when to hold and when to exhale, so your eyes can stay closed and your phone can stay in your pocket.

Can you really breathe with your eyes closed?

Yes. On Apple Watch and Wear OS, Vayu runs the whole session on the watch. Each phase has its own haptic texture and the boundary between breaths is a short silence, so you never need to look at the screen or hear a sound. Many people practise at night, in meetings or on transit this way.

Does Vayu read my HRV during the session?

No. Vayu reads heart rate variability (SDNN, the figure Apple Health reports) from your watch after each session and uses it to shape the next one. The pacing does not change mid-session. Heart rate can be shown live on the watch during a session, but that is heart rate, not HRV.

Which techniques have haptic guidance?

Box breathing (4-4-4-4), 4-7-8, Cyclic Sighing (3-1-6), Extended Exhale, self-designed sessions with your own ratios (for example coherent breathing at 5 to 6 breaths per minute), and the pranayama techniques Anulom Vilom, Bhastrika and Kapalbhati. Every phase of every technique, including holds, has its own haptic pattern.

Which watches work with Vayu?

Apple Watch Series 6 and later, SE (2nd generation) and Ultra on watchOS 10.6 or later, and 68+ Wear OS models on Wear OS 3.0 or later, including Google Pixel Watch and Samsung Galaxy Watch. Vayu does not support Garmin, Fitbit, Oura or WHOOP.