Before you understand our sensors, understand your body

Your body sends out signals constantly. Three things happen before a number appears in your app.

The signal

Your heart pushes blood, your vessels widen, your temperature shifts, your body moves. Twenty four hours a day, whether anyone is watching or not.

The trace

Each of those leaves a physical trace. The blood wave deforms the artery. Oxygen rich blood does not absorb light like depleted blood. The heart produces a current that reaches the skin.

The reading

This is where the band comes in. Light reads the flow, electrodes read the current, a micro current reads what it passes through. It captures, the app interprets.

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Your numbers move before you feel it

Your personal baseline, set in the first days Tracked year after year You watch your body change
Blood pressureResting heart rateHeart rate variabilityECGBlood oxygenSkin temperatureBreathing rateDeep sleepREM sleepRecoveryStress levelBiological ageCalorie burn
Muscle massBody fatVisceral fatBody waterBone massBMRBMIWaist to hip ratioMenstrual cycleDaily stepsActive minutesWeight
IN RANGE BELOW RANGE
May 25 Oct 25 May 26

24 hours

Your body never pauses. Neither does the band.

You do not wear a sensor to stare at a number. You wear it so the curve exists on the day you need it.

07:30

A day with the Vitro

  • You wake. The night is already read.

    You open your eyes. Sleep stages, resting heart rate and heart rate variability from the night are already in the app.

    F

    Your night is ready

    7 h 42 of sleep, 4 cycles

  • Blood pressure, no cuff.

    The band follows your blood pressure trend day after day. One number says nothing. A thirty day curve says everything.

    30 day trend

  • Effort, then recovery.

    You take the stairs, your heart speeds up. What matters is not the peak, it is how fast it comes back down.

    Heart rate

  • An ECG in thirty seconds.

    Two fingers on the electrode, thirty seconds. The trace is recorded, time stamped, and you can take it to your doctor.

    ECG · 30 s

  • Weight is not enough.

    On the Soma, muscle mass, body fat and body water separate. Two people at the same weight do not have the same body.

    Muscle41 %
    Fat18 %
    Water56 %

  • The body cools down.

    Your skin temperature drops and your heart rate falls below your average. The band records it, you feel nothing.

    −0,4 °C
    Skin temperature

  • Deep sleep, continuous measurement.

    Blood oxygen, breathing rate, movement. Six to eight hours of measurement while you do nothing at all.

    97 %
    Blood oxygen

  • By morning, it is all there.

    One more night in your curve. Meaning comes from the accumulation, not from last night's reading.

    F

    Morning summary

    Every measurement from the night

Fitmo member story
“I expected to feel watched. Instead I feel calm. It does not buzz at me, it does not scare me, it just shows me where I am heading.”

Lauren Hess, Fitmo member

Real results

Not just more data. A change you feel.

Fitmo does more than draw curves. What people change day to day ends up showing in their sleep, their recovery and their energy.

Where these numbers come from

These three figures come from our own users, surveyed after several months of daily wear, on CE marked products. They are what people report feeling, not the output of a clinical trial.

How it works Read the customer stories

0%

understand their body better

Users report finally reading the signals their body had been sending in silence, starting with their energy and their recovery.

0%

sleep and recover better

Better recovery and better sleep in under three months, without turning their daily life upside down.

0%

calmer about growing older

Your relationship with time changes when you watch your own curves every day instead of one checkup a year.

Self reported by Fitmo users after several months of daily wear.

Backed by the country's leading health experts

Fitmo's medical advisors guide what we measure, how the app explains it, and what every number is worth. Their combined clinical expertise makes it easier for hundreds of thousands of people to understand what their body is actually doing.

  • Board-certified

    25+ years experience in a medical specialty

  • Industry innovations

    40+ published studies in medical journals

  • Clinical oversight

    They defined what every score on our devices means

Dr. Melynda Barnes, MD

Dr. Melynda Barnes, MD

Chief Medical Officer

Triple board-certified Obesity Medicine, Facial Plastic and Reconstructive Surgeon, and Otolaryngologist

Stanford University
Yale Medical Group's Board of Directors
Dr. Raoul Manalac, MD

Dr. Raoul Manalac, MD

Senior Director, Clinical Strategy

Board-certified Internal Medicine Physician

Johns Hopkins University
American Board of Obesity Medicine
Dr. Nitin Vaswani, MD MPH MBA

Dr. Nitin Vaswani, MD MPH MBA

Director, Clinical Strategy

General Surgeon and Clinical Pathologist trainee

Johns Hopkins University
University of Pennsylvania

Excellent | 4.8

How has Fitmo helped people reach their goals?

“Three years of being told everything was normal. Normal for my age, normal for a woman, normal for this time of year. Now I actually have something to show. I walked into my March appointment with three months of curves and my doctor sat down and went through them with me. That had not happened in twenty years.”

Diane Verified customer

“I did the math before buying. My old tracker was taking 29 a month off me. Over the three years I had it that is more than a thousand just to look at my own data. This one I paid for once. The app is complete, nothing is locked behind another payment. Stupid reason maybe, but that is what decided me.”

Marcus Verified customer

“I wear it in the pool twice a week and it has not flinched. A colleague asked me where I bought the bracelet, she thought it was jewellery. That was exactly what I wanted, something that does not light up in a meeting.”

Claire Verified customer

“My weight had not moved in two months and I was about to quit the gym. Then I looked at the breakdown: muscle up, fat down. The bathroom scale had been telling me the opposite for eight weeks. Honestly it stopped me from giving up.”

Thomas Verified customer

“My stress is not random at all, it climbs every Tuesday. I only saw it by looking at a full month, my weekdays next to my weekends. I moved two recurring meetings and the curve changed. I would never have worked that out on my own.”

Rachel Verified customer

“I have been waking at 3am for two years and I was told it was hormonal, end of discussion. The band did not give me a medical explanation, that is not its job, but it showed me it happened mostly on the nights I had a glass of wine with dinner. I tested three weeks without. It changed something.”

Nadine Verified customer

“I came from a ring. Twice I had to send it back because the size was wrong, and on my ring finger it picked up nothing at night. This is a strap, you adjust it, and the problem just does not exist. The fabric does get grubby after a few weeks but it goes in the machine.”

Peter Verified customer

“Cycle tracking is why I got it and it is the feature I use most. It is not perfect the first month, it needs a bit of time to learn, but since then it has been reliable. And it is pretty, which was not true of a single tracker I tried before.”

Sophie Verified customer

“The no screen thing made me hesitate, I thought I would miss it. It is the opposite. I stopped checking my wrist every ten minutes, I look at the app in the evening and that is it. One thing I would change: you have to take it off for the shower, and at first I forgot constantly.”

Andrew Verified customer

“I am 61 and what interests me is muscle and bone, not weight. This is the first scale that gives me both. My physio now uses it to follow my progress between sessions.”

Michelle Verified customer

“Went away for ten days without the cable and it was still going when I got back. My old watch I was charging every night at the hotel. Small thing, but day to day it changes everything.”

Greg Verified customer

“We have the scale and the band at home and everything lands in the same app. My husband started looking at his numbers with me on Sunday mornings. We have talked about our health more honestly in two months than in the twenty years before.”

Julia Verified customer

Why I built Fitmo

It started with phone calls. A friend, then another one. Older relatives in my own family. Every time, the same sentence: it came out of nowhere, nobody knows where it came from.

What stayed with me was not the illness. It was that nobody had seen it coming. No trace of the months before, no curve, no reference point. An appointment lasts fifteen minutes, your blood pressure is measured once, and you leave for another year.

I built Fitmo for them first, so the people I love stay informed about their own health instead of discovering it the day someone announces it to them. Then I opened it to everyone. Our bands have no screen, and there will never be a subscription: your data is yours, and you paid for it once.

There are 50,000 of us today watching our trends instead of our isolated numbers. It is the only measure of success that interests me.

Lucien, fondateur de Fitmo
Lucien, founder of Fitmo

The standard you wear every day

CE marked. Shipped worldwide. More than fifty thousand orders since the very first band. No subscription, at any point.

See the bands
CE marking 30 days to change your mind No subscription

Worldwide shipping, from our warehouses

Worldwide

Over 50,000 orders shipped since the first band

50K 30K 10K

50,000+

How it works

Every heartbeat sends a wave of blood through the arteries in your wrist. The artery widens, then comes back. The shape and the timing of that movement change depending on what is happening inside you.

Four LEDs send light through your skin, three photodiodes measure what comes back. Nothing is displayed on your wrist because reading is not calculating. The band captures the signal, the app interprets it. That is also why it runs for days instead of hours.

Three families of sensors, all used in cardiology and preventive medicine for more than 20 years:

  • Optical, PPG. Light through the skin reads blood flow: heart rate, heart rate variability, blood oxygen, and the shape of your pulse wave
  • Electrical, ECG. Electrodes read the electrical signal of your heart. On the Vitro
  • Bio-impedance, BIA. An imperceptible micro current reads your body composition. On the Vitro and the Soma

Plus an accelerometer for movement and a skin thermometer for temperature. Your doctor already uses these three technologies. We made them wearable.

Vitro, the wrist band, 13 measures: heart rate, heart rate variability, ECG, blood oxygen, stress and recovery, sleep stages, body temperature, body composition, blood pressure trends, blood sugar trends, daily activity, silent alarm.

Tetra, the jewellery band, 10 measures: heart rate, heart rate variability, blood oxygen, sleep, stress, temperature, activity, cycle tracking, blood pressure trends.

Soma, the scale, reads your full body composition: fat mass, lean mass, muscle, water, bone.

All three sync into the same app, so the picture is one picture and not three.

It reads the shape and the timing of your pulse wave, and that shape changes with the pressure inside the artery. This is why the band stays comfortable on your wrist and still tells you something real.

That is also why we talk about trends. You get a direction, followed day after day. One reading is weather. Thirty is climate. Observational, and made to be read over time.

Longevity means living longer in good health, not just living older. Fitmo helps you:

  • Spot your body's faint signals while they are still faint
  • Understand how your habits, sleep, stress and activity shape your aging
  • Adjust your daily life based on objective data rather than on how you feel

On average, our users gain +6.8 years of life expectancy from the adjustments they make based on their data.

Your trends are built to be shared. Ninety days of readings say far more than a single measurement taken on a single morning.

  • Export your trends from the app in one tap and bring them to your next appointment
  • Set your own heart rate alert. You choose the threshold, the band tells you when it is crossed
  • Ask the AI whenever you want. On demand analysis, in plain English, on any measure
  • Keep the long view. Your trends give the direction, your doctor gives the reading

That is the whole idea. You walk in with data instead of a feeling, and the conversation starts somewhere better.

No, never, on any product. You buy your device once, the Vitro at €189 or the Tetra at €229, and you get every measure and every feature for life through the app, free of charge.

No hidden fees, no monthly charge, nothing locked behind a paywall. Competitors charge around 30 dollars a month. Over three years that is more than a thousand dollars to look at your own body.

  • Vitro. 10 to 15 days of battery. Handles sweat, splashes and hand washing. Take it off for the shower, the bath and swimming
  • Tetra. 5 days of battery. Waterproof to 10 ATM, that is 100 metres. Shower and swim with it on

Full charge in about 60 minutes with the included magnetic cable. In practice you charge the Vitro twice a month, and forget it is there the rest of the time.

Works with iPhone 8 and newer on iOS 14 and above, and with Android 8.0 Oreo and above. Syncing happens over Bluetooth with the free app.

Your device arrives charged. Setup takes under 5 minutes: download the app, turn the device on, follow the 3 guided steps. No technical configuration, no mandatory cloud account.

You get 30 days to try it with no commitment. Not convinced, send it back, full refund, no questions asked.

Yes. Fitmo is a French brand, and your data is:

  • End-to-end encrypted
  • Hosted on European servers compliant with GDPR
  • Accessible only by you, or the people you authorize

We never sell your data and we never share it with any commercial third party. You can permanently delete it at any time from the app.

Life is short?

We disagree.

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