Vitalkultur – CARLON Haptic Breathwork
World Peace in Us · Soulonaut
Closed beta · Haptic breathwork for Apple Watch
CARLON
Breathwork
Your breathwork lab. On your wrist.

Breathwork you feel —
eyes closed.

19 breathing patterns, felt through the Taptic Engine — eyes closed, no screen.
Afterwards you see how you breathed.

Now in closed beta · testers & breath-coach partners welcome

Apple Watch Ultra showing CARLON Tummo session outdoors in cold conditions
Privacy by Design Apple Watch native Haptic-guided Live Biometrics
PractitionerFeel every breath CoachDesign & share ResearcherH10 & HRV

Your wrist guides every breath.
Eyes closed is enough.

Eyes closed — haptic waves guide every breath from the wrist

Haptic pulses rise for inhale, fall for exhale.
Close your eyes. Just feel.

Double Tap to end breath hold during Tummo retention

Holding your breath during Tummo? Double Tap ends the retention.
Eyes stay closed. Fingers decide.

The App

Swipe through CARLON.

Just like on the Watch — swipe left and right to explore.

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Navigate
CARLON Watch — Main menu: Patterns, History, Settings, Recommend

Patterns, History, Settings, Recommendations — everything on your wrist.

Breathe
CARLON Watch — Coherence breathing session with Flower of Life

Flower of Life guides your breath. Haptics pulse on your wrist. Eyes closed.

Your Music
CARLON Watch — Now Playing controls during a breathing session

Keep your own music playing. The Now Playing controls sit one swipe away — on your wrist.

Go deeper

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19 Patterns
Watch — Tummo, Coherence, Box and more

From calm to fire. Where a study exists, it is named in the app — with what it tested.

Two atmospheres
Watch — Tummo session, orange Flower, Power in

Tummo burns orange. Coherence glows green. You feel the difference before you see it.

Create your own
Watch — Custom Pattern builder

Build your own breathing pattern. Name it. Use Tummo as base. Make it yours.

Your breathwork on your wrist.
The details where you can actually read them.

Watch — heart rate curve during Tummo session iPhone — detailed heart rate analysis

Your body

Real data. Not promises.

CARLON keeps a record of every session — the rhythm on your wrist, the details on your iPhone.

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Watch · Heart Rate
Watch — heart rate across a full session

See how your heart rate moves through each breath hold — on your wrist.

Watch · Breath Sync
Watch — breath synchronicity 36%, phase, frequency, depth

The target rhythm beside your session. Breath by breath with breathing detection or a chest strap.

Watch · Retention
Watch — hold times of rounds 1 to 3

Every round, every hold time recorded — compare them across sessions.

iPhone · Heart Rate
iPhone — full session HR curve over 3 minutes

Your heart rate across the whole session — phase by phase.

iPhone · Insights
iPhone — breath sync gauges, HRV context, personal insights

HRV in the context of your own range — and the signal behind every suggestion.

iPhone · Progress
iPhone — retention progress over 30 sessions with personal best

30-session trend and personal bests — your practice over time.

The science

Know what you breathe.

Every pattern explained. Where research exists, the source sits beside the practice — and what it did and did not test.

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Breathing Wiki
iPhone — Breathing Wiki: understand your breath, patterns explained

Every pattern explained — how it is done, where it comes from, which studies examined it.

Your Dashboard
iPhone — HRV Today dashboard, 7-day trends, session count

HRV today, 7-day trends and your sessions at a glance.

Understand Retention
iPhone — what is retention, progress over 30 sessions

CARLON doesn't just measure — it teaches. Every metric explained in context.

~5.5
breaths/min resonance3
111
participants4
Resonance rate and study size from peer-reviewed literature — not measured by the app, and no promise of an effect.
Research we build on
Breathe (ERS) Frontiers in Psychology Cell Reports Medicine
[1] Ma et al. (2017) "Effect of Diaphragmatic Breathing on Attention, Negative Affect and Stress" Frontiers in Psychology 8:874. [2] Lehrer & Gevirtz (2014) "Heart rate variability biofeedback: mechanisms and models" Frontiers in Psychology 5:756. [3] Russo et al. (2017) "The physiological effects of slow breathing" Breathe 13(4):298-309. [4] Balban et al. (2023) "Brief structured respiration practices enhance mood" Cell Reports Medicine 4(1):100895. n=111.

For coaches & trainers

Design the breath.
Then share it.

Build a pattern for a client's evening wind-down — set the phases, the rounds, the recovery, your colour, your name. Send it as a file or a link. They open it in CARLON and follow your rhythm on their Watch, eyes closed.

CARLON Preset Builder — design and brand custom breathing patterns
Breath Composer

A 6-key timeline to compose any pattern.

Preset Builder

Phases, rounds, recovery, your colour, your coach note.

Share it

Send a file or a link — clients open your pattern in CARLON with one tap.

Reports back

Clients export a session, you import it into your coach view.

Breathing Wiki

Sources and safety notes for every pattern, for your clients.

Become a founding coach partner

Early access · help shape the coach tools · founding-partner recognition

For researchers

Your breath,
as data.

Connect a Polar H10 or Movesense straight to your Watch — no iPhone in between. The optional CARLON Cockpit records beat-to-beat intervals, artifact-filtered, with the signal source always named. Every session exportable, methodology included.

CARLON research cockpit — HRV metrics and analysis
Polar H10 or Movesense

Beat-to-beat RR straight to the Watch, artifact filter, signal source named.

Live during sessions

Heart rate on your wrist as you breathe; with a chest strap, the beat-by-beat trace.

Rigorous, not hyped

Established physiology, sources named, limits stated — no promise of an effect.

HRV suite

With a chest strap (CARLON Cockpit): RMSSD, Poincaré SD1/SD2, DFA-α1, RSA, Baevsky index.

Research export

JSON / CSV / Markdown with methodology + SHA-256 integrity.

A wellness product, not a medical device. Not intended to diagnose, treat, cure or prevent any disease.

Talk research

Origin

Born from our breath.

Jan & Carina — Founders of Vitalkultur

Jan & Carina · Founders of Vitalkultur

When our son Carlon was born on a January night in 2026, breathwork became more than a technique — it became the way we stayed grounded together.

We wanted an app that feels the way breathing feels. So we built one during night shifts — testing haptic pattern after haptic pattern until each breath had its own rhythm.

One night, the family was asleep. I put CARLON on the lowest haptic level — barely there, just a whisper on my wrist. Coherence breathing, 5.5 breaths per minute. The vibration was so subtle that I had to listen for it. And that's exactly what pulled me out of my head. No thoughts about code. No plans for tomorrow. Just the faintest pulse, rising for inhale, falling for exhale. I fell asleep mid-session.

That was the moment I knew we were on the right track. Not because of the data — but because I stopped thinking and started breathing. Named after our son, because freedom is in every breath.

The beta

Your Watch becomes
a breath coach.

By invitation

Full access for a small group of selected testers — before CARLON goes public.

  • Haptic breathing guidance — eyes closed
  • 19 breathing patterns + build your own
  • Live heart rate on your wrist; beat by beat with a chest strap
  • iPhone companion with full analysis
  • Breathing Wiki with sources and safety notes
  • Siri, Calendar, Complications, and more
Request beta access

Currently in closed beta · we reply personally

Questions

Frequently asked.

Do I need an Apple Watch?
Yes — CARLON is Watch-first. Haptic guidance, Double Tap and heart rate during sessions all run on the Watch, without the iPhone nearby. The iPhone companion holds your history, the analysis and the Breath Composer. Requires an Apple Watch with watchOS 11 or later and an iPhone with iOS 18 or later.
How do I get in, and what will it cost?
CARLON is currently in closed, invitation-only beta. Request access and we'll get back to you personally. Pricing will be announced at launch.
Does it work with HealthKit?
Yes. During a session the Watch records your heart rate; completed Watch sessions are saved to Apple Health as a workout, breathing sessions also as Mindful Minutes. HRV comes from Apple Health. With a Polar H10 or Movesense you get beat-by-beat data and the HRV of the session itself. CARLON sends none of it to us.
Is this a medical device?
No. CARLON is a non-regulated wellness app. It is not intended to diagnose, treat, cure, or prevent any disease. Always consult a physician before starting breathwork if you have cardiovascular, respiratory, or neurological conditions. Never hold your breath or breathe intensely in or near water, while driving, or standing — practise seated or lying down, and stop if you feel light-headed.
What makes CARLON different?
CARLON guides through haptics, not the screen: you close your eyes and feel every phase. Afterwards each session is a record — pattern, timing, hold times, heart rate and how you felt before and after.

Ready to feel it?

CARLON is in closed beta. Tell us a little about you and we'll send an invite — we read and reply to every message personally.

Request beta access

Or just write us: jan@vitalkultur.com