RYTM Zero
The health band that reads your sleep, energy, stress and heart 24/7. And never sends you a bill again.
- $0per month
- 30day battery
- 24/7tracking
- 0screens
- Wake up to your energy, sleep and stress scores
- Know when to push and when to recover
- A soft knit band you forget you are wearing
One price. Yours forever. Free shipping · 30-day returns
- Free shipping
- 30-day returns
- Secure checkout
30 days to fall for it
Wear it for a month. Sleep in it, train in it. If it's not for you, send it back.
Product details
RYTM Zero reads your body around the clock and turns it into one simple answer every morning: push, or recover. Sleep stages, energy, stress, heart rate, HRV and blood oxygen, from a light knit band with no screen to distract you.
No membership. No monthly fee. Pay once and it is yours, with up to 30 days on a single charge.
What it tracks
- Sleep: light, deep and REM stages, plus a nightly sleep score
- Energy: a daily body battery score
- Stress and HRV, all day
- Heart rate 24/7 and blood oxygen
- Steps, calories and workouts across many sport modes
- Menstrual cycle tracking
- Call and message alerts by a gentle vibration
Details
- Battery: up to 30 days of normal use. Full charge in about 1.5 hours with the magnetic charger
- Built for sweat, rain and showers
- Bluetooth 5.3. Works with iPhone (iOS 9 or later) and Android (4.0 or later) through the free companion app
- Soft elastic knit strap, metal and PC sensor module
In the box
- RYTM Zero
- Magnetic charging cable
- Quick start guide
Shipping and returns
Free shipping on every order. Delivery takes 5 to 7 business days, and you get a tracking link as soon as it ships.
Not for you? Return it within 30 days of delivery.
Works with
iPhone with iOS 9 or later and Android 4.0 or later, over Bluetooth 5.3, through the free companion app. No account fees.
RYTM Zero
Zero subscription.
Zero screens.
Zero guesswork.
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Zero subscription
Pay once and every score, every chart and every insight is yours. No membership, no paywall, no yearly bill.
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Zero screens
No notifications pulling you in. RYTM Zero works quietly on your wrist and your data waits in the app.
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Zero guesswork
Energy, sleep and stress turn into clear scores every morning. Push hard or recover, and know why.
Wake up to three scores. Then go live.
Every morning the free companion app turns your night into clear scores. No charts to decode, no guessing.
- EnergyHow charged you are today, from your sleep, HRV and resting heart rate.
- SleepLight, deep and REM stages with a score you can actually improve.
- StressSee the tense hours, and what brings you back to calm.
Engineered to read you. Day and night.
Everything that matters sits in one slim module, on a strap you forget about.
- 1
Optical heart sensor
Green and red light read your pulse, HRV and blood oxygen through the skin, 24 hours a day.
- 2
Magnetic charging contacts
Snaps onto the magnetic cable. Full in about 1.5 hours, then up to 30 days on one charge.
- 3
Slim sensor module
A metal and PC body with a motion sensor and a vibration motor for silent call and message alerts.
- 4
Soft knit strap
Elastic and soft on the skin. No buckle, no clasp. Slide it on and forget it.
Made to be worn. Built to be read.
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Know how your body feels
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Train with purpose
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Sleep that actually restores
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Stress, measured
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Recover like you mean it
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Built around your cycle
Readings shown are examples.
Put it on. That is the whole setup.
No learning curve, no daily charging, no screen to manage.
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01
Slide it on
Adjust the knit strap once and pair it with the free app in about a minute.
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02
Live your day and night
Train, work, sleep. RYTM Zero measures in the background and never asks for your attention.
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03
Wake up to your scores
Energy, sleep and stress, ready with your morning coffee. Push or recover. Your call.
WHOOP charges every year. RYTM Zero never will.
Membership bands charge you every year just to see your own data. RYTM doesn't. Ever.
What you pay over 2 years
That's 298,01 € less than WHOOP One over 2 years.
Membership prices as listed on whoop.com in November 2026. WHOOP is a trademark of its owner.
Built to disappear. Made to last a month.
Soft knit, all day and night
An elastic knit strap and a light sensor module you forget you are wearing.
30days
Battery life
Up to 30 days of normal use on one charge.
1.5h
Full charge
Magnetic charger. Back to 100% before breakfast.
24/7
Always measuring
Heart rate, HRV, blood oxygen, stress and sleep.
0screens
Zero distractions
No notifications pulling you in. Your data waits in the app.
iOS + Android
Works with your phone
Bluetooth 5.3 and a free companion app. No account fees.
Sweat, rain, shower
Keep it on
Built to stay on through workouts, downpours and showers.
Do I need a subscription?
No. You pay once for the band and the companion app is free. There are no monthly or yearly fees, ever.
How long does the battery last?
Up to 30 days of normal use on a single charge. A full charge takes about 1.5 hours with the magnetic cable.
Does it work with my phone?
Yes. RYTM Zero connects over Bluetooth 5.3 to iPhone (iOS 9 or later) and Android (4.0 or later) through the free companion app.
Can I train and shower with it?
Yes. It's built for sweat, rain and showers, so you can keep it on day and night.
Why no screen?
So nothing pulls you in. Your readings wait in the app whenever you want them, and the band gives a gentle vibration for calls and messages.
What exactly does it track?
Sleep stages and a sleep score, energy (body battery), stress, HRV, heart rate 24/7, blood oxygen, steps, calories, workouts in many sport modes, and your cycle.
What if it's not for me?
You have 30 days to send it back. Shipping is free.
Know your rhythm. Starting tomorrow morning.
One band, one price, no subscription. Free shipping and 30 days to make sure you love it.
99,99 €199,99 €once, not every year
