Pulse-wave PPG
Multi-wavelength optics read the pulse wave (PPG) directly from the skin — continuous heart rate and rhythm, day and night.
01Bracelet WITU
Medical-grade optical sensors set in sterling silver 925, natural agate and medical-grade optics. Premium health monitoring — a piece of jewelry and a full health tracker on your wrist.
Optical PPG7 days of useIP68
Silver · pricefrom $699
Medical-grade optical sensors
High-precision optical sensors read the pulse wave straight off your wrist — HRV, SpO₂, temperature and more, 24/7, with no touch-to-record and nothing to remember.
HRV, SpO₂ and temperature
The same optical module tracks heart-rate variability, blood-oxygen saturation and skin temperature — a full picture of recovery and stress.
02Jewelry integration
A silver butterfly tensioner holds the sensors snug against the wrist for a clean, stable read — medical-grade optics inside a piece of jewelry.
03Four metals. From premium to luxury.
The same sensor module — in a case for every taste and budget. The price of the device, with no mandatory subscription.
What the bracelet
Six parameters in real time — synced in the app and factoring in your blood tests.
PPGPulse waveoptical heart rate
HRV24/7every second
SpO₂Pulse oximetryO₂ saturation
TemperatureSkinNTC thermistor
EDAStresselectrodermal activity
ActivitySteps · sleepaccelerometer
Specifications
- Case
- Titanium / Silver / Gold / Platinum
- Straps
- Silicone · carbon · leather
- Sensors
- Optical sensors PPG, SpO₂, NTC, EDA, IMU
- Battery life
- up to 7 days
- Protection
- IP68 — water, dust
- Connectivity
- Bluetooth 5.3 LE
- Compatibility
- iOS 15+ · Android 11+
- Warranty
- 2 years
WitU vs the competition
An honest comparison with current market models (2026). Gold marks where WitU leads, gray marks parity — no spin.
Choose a device to compare:
0WitU leads
WitU advantage Parity 2 Competitor leads
0Whoop leads
Feature
WitU
Whoop 5.0 / MG
Subscription & access
$0 — no mandatory subscription
Required, from $199/year
ECG recording
ECG — via patch and chest strap
—Whoop MG only, on demand
HRV monitoring
Continuous 24/7
—Overnight + daytime stress
SpO₂ · temperature · EDA
SpO₂ · temperature · EDA
SpO₂ · skin temp.
Bloodwork (bio-context)
Yes — AI blood-test parser
No
AI recommendations · supplements
Supplements and nutrition by biomarker
—Whoop Coach, no supplements
Case materials
Sterling silver 925 · agate · gold · platinum
Polymer, textile band
Battery life
—up to 7 days
up to 14 days
Device ecosystem
5 devices, one core
Band only
Device price
—from $399
—Device bundled with subscription
Build your bracelet
Metal, strap, engraving — see the result in 3D and place a pre-order. Now shipping across the United States in 5–7 days.
2-year warranty No subscriptions Ships in 5–7 days
About the bracelet
The bracelet uses high-precision, medical-grade optical sensors: PPG (pulse wave), HRV, SpO₂ and temperature, read 24/7 with no touch-to-record. A silver butterfly tensioner keeps the sensors snug against the wrist for a clean, stable read. If you want a true ECG, the WitU ecosystem offers it through the Patch (continuous ECG, up to 14 days) and the Chest Strap (dry ECG electrodes, HRV, VO2max) — the bracelet itself is optical.
No. The core features — PPG, HRV, heart rate, sleep — work without a subscription forever. A subscription is only needed for advanced AI services (supplement recommendations, lab test analysis). Premium costs $9.99/mo (the annual plan saves you 2 months). The device's core features work without a subscription.
Titanium Grade 5 (from $399), sterling silver 925 (from $699), gold 750 (from $2,499), and platinum 950 (from $7,999). The sensor module is identical in all of them — only the material and the price differ.
Up to 7 days with active use. A full charge takes about 90 minutes on the magnetic pad.
No. WitU is a wellness and performance wearable, not a medical device, and it isn't intended to diagnose or treat any condition. Its optical readings are wellness insights, not a diagnosis. If you have any health concerns, consult a qualified professional.
WITU is a wellness device, not a medical device
Insights are provided for general wellness and informational purposes only and are not intended to diagnose, treat, or replace professional medical advice. If you have any health concerns, consult a qualified healthcare provider.