How it Works

— HOW IT WORKS

Three steps. Zero effort. Lasting calm.

Tummo works silently in the background of your life. Here’s exactly what happens inside the device, on your skin, and in your nervous system — from the first moment you put it on.

Deep
Breathing

Breath Rate

8/min

Optimal range

Depth

Diaphragm

Not chest

Status:

Calm Detected

THE MECHANISM

Every detail, explained.

↓

— STEP ONE

Tummo reads your breathing constantly.

Worn against your abdomen with a thin adhesive patch, Tummo’s ultra-slim pressure sensor tracks the subtle rise and fall of your diaphragm — the muscle responsible for deep, effective breathing.

Unlike chest breathing (which shallow, anxious breathing relies on), diaphragmatic breathing is a reliable, measurable signal for your nervous system state. When your breathing shifts from deep and slow to fast and shallow, Tummo knows before you do.

Monitors breath rate, depth, and location (chest vs. diaphragm) continuously
Detects the shift toward shallow breathing in real time — not retrospectively
Learns your personal baseline so alerts are calibrated to you, not an average
Runs passively — no app open required, no button to press

Live Breathing Signal

Deep & Slow

Shallow Detected

Monitoring active — diaphragm signal clear

Silent Haptic Cue

A gentle pulse pattern guides your next breath automatically

Other apps

Notification you have to see, tap, and remember to follow

Tummo

A nudge directly to your body — you respond automatically

— STEP TWO

A silent cue. Right when you need it.

The moment Tummo detects shallow breathing, it sends a gentle haptic pulse — a subtle vibration pattern against your skin. Not a buzzing alarm. Not a phone notification. Just a quiet, private nudge.

The cue takes less than a second to feel and less than three breaths to follow. Most users describe it as a soft reminder rather than an interruption — something that draws you back into your body without pulling you out of the room.

Silent haptic cue — nobody around you knows it happened
Pattern is designed to naturally guide the exhale longer than the inhale
Intensity is adjustable — from barely-there to clearly noticeable
Can be paused at any time from the app or device button

Silent Haptic Cue

A gentle pulse pattern guides your next breath automatically

Other apps

Notification you have to see, tap, and remember to follow

Tummo

A nudge directly to your body — you respond automatically

— STEP THREE

Your body learns. Calm becomes the default.

This is where the real magic happens — and why Tummo is fundamentally different from a stress-relief tool. It’s a nervous system retraining device.

With repeated guided corrections, your body begins to internalize deeper breathing as its default state. The research is clear: consistent diaphragmatic breathing creates lasting neurological change — strengthening the parasympathetic pathways that govern calm.

Most users notice they’re breathing differently even when not wearing Tummo by week four. By week twelve, calm stops being something you work toward and starts being something you simply are.

Stress Episodes Per Week

90-Day View

Stress episodes detected

Average result: 73% reduction in detected stress episodes after 90 days of daily wear.

THE APP

Everything you need to see your progress.

The Tummo app is included free for 12 months. It’s designed to give you insight — not overwhelm you with data.

01 Live Dashboard

Rate ●●●●●●●●●●

Depth ●●●●●●●●●●

Calm ●●●●●●●●●●

See your current breathing quality and calm score in real time.

02 Weekly Progress

−41%

Stress vs. last week

Track how your nervous system is changing week over week.

03 Stress History

See exactly when stress spiked and how fast you recovered.

04 SOS Mode

On-demand guided exercises for big moments — before a speech, exam, or difficult call.

HOW TUMMO STACKS UP

Why other tools fall short.

Feature	Meditation Apps	Other Wearables	Tummo
Works before you notice stress	×	×	✓
No effort or routine required	×	×	✓
Real-time physical intervention	×	Some	✓
Retrains nervous system over time	Partially	×	✓
Invisible to others	×	Some	✓
No phone needed in the moment	×	Some	✓
90-day money-back guarantee	×	×	✓

A TYPICAL DAY

Tummo works while you live your life.

🌅

MORNING

Wake up. Put it on.

Apply Tummo with a fresh adhesive patch in seconds. It pairs to your phone automatically and starts monitoring immediately. That’s the entire morning routine.

💼

AT WORK

Stress spikes. Tummo catches it.

A difficult email, a tense meeting, a tight deadline. Tummo feels the shift in your breathing before you do and delivers a silent cue. You take one deeper breath. The moment passes.

🌆

EVENING

Wind down, automatically.

As your day slows, Tummo’s cues help your breathing transition naturally. Many users find they fall asleep faster — because their body has already been gently guided toward calm.

📱

AFTER 90 DAYS

Check your progress.

Open the app and see exactly how much has changed. Most users show a 60–80% reduction in detected stress episodes. Many report they’re calmer even when not wearing it.

FAQ

The questions we'd ask too.

How do I know the breathing detection is accurate?

Tummo’s sensor measures diaphragm displacement — a well-established, clinically validated proxy for breathing depth and rate. The detection algorithm was developed with respiratory scientists and validated against spirometry (clinical lung function testing) in our internal studies. We’re confident enough in it to offer a 90-day money-back guarantee.

Will I get annoyed by constant cues?

Tummo only activates when your breathing shifts toward shallow or rapid patterns — not on a schedule, and not constantly. In practice, most users receive 3–8 cues per day during high-stress periods and you can set a maximum number of cues per hour in the app. As your baseline improves over weeks, the frequency naturally decreases.

What if I just naturally breathe fast?

Tummo learns your personal baseline during the first 48 hours of wear. It calibrates to your normal patterns before flagging anything as a stress signal. Someone with naturally faster breathing won’t get overcued — the system adapts to you, not a population average.

What I wear it while exercising?

Yes, with an important note: Tummo automatically detects elevated activity levels and adjusts its thresholds accordingly. It won’t trigger cues during a run. The system distinguishes between exercise-related fast breathing and stress-related shallow breathing using movement data alongside the breath signal.

What happens to my date?

Your breathing data is processed on-device first. What’s sent to the app is aggregated patterns — not raw breath-by-breath data. We don’t sell data, we don’t share it with advertisers, and you can delete your entire account and associated data at any time. Privacy is a core design principle, not an afterthought.

What if it doesn't work for me?

That’s what the 90-day money-back guarantee is for. We know real nervous system change takes time — that’s why we give you three full months, not thirty days. If you wear Tummo consistently for 90 days and don’t feel measurably calmer, contact us for a full refund. No forms. No questions.

JOIN THE WAITLIST

Start breathing differently.

Join over 1,000 people who are done fighting their own nervous system. Lock in 50% off your Tummo before the waitlist closes.