retimer 3 now available on 
in Japan
in Japan in Japan
subscription
fees
Sleep health
assistant
design,
maximum
health
companion
5 ATM
Health data
you can
days charge
VO2 Max
for lasting
performance
available for
Start your day with detailed sleep insights, empowering you to make informed decisions for a productive day.
retimer Ring tracks up to 12 different sleep parameters providing detailed reports directly to your mobile.
Track steps, measure VO₂ max, monitor activity intensity, and estimate calories burned – all in one place.
The retimer Ring delivers actionable insights to help you better understand and optimize your daily movement. Your all-day health tracker with 54+ exercise modes.
VO2 Max is a measure of your cardiorespiratory fitness, based on your body’s ability to use oxygen during intense activity.
It’s a single number that captures your heart, lungs, circulatory system, and muscle cells all working together higher score indicates better aerobic fitness.
Whether you’re an athlete in training or just starting your fitness journey, retimer Ring gives you a powerful tool to understand and improve your heart and lung capacity — right from your finger.
Sugar levels don’t just affect metabolism — they impact your energy, mood, sleep, and long-term wellness. That’s why the retimer Ring includes a revolutionary, non-invasive Sugar Metabolism Indication system built right in.
When you are exploring metabolic health, retimer Ring empowers you with data that matters.
Takes the Guesswork Out of Fertility and Period Tracking.
Get personalized women’s health alerts right on the retimer Ring app, including menstrual cycle reminders and track ovulation.
Why sleep matters
Sleep is the foundation of health, influencing mood, energy levels, & cognitive function.
It restores the body by repairing tissues, boosting immunity, and balancing hormones.
At the same time, it sharpens the mind by clearing toxins, strengthening memory, and improving focus.
Beyond this, it protects heart and metabolic health by regulating appetite, blood sugar, and cardiovascular function.
We’re not just building a product — we’re building to a promise.
The retimer Ring already delivers cutting-edge sleep tracking but that’s just the beginning.
Through regular upgrades, the retimer Ring will evolve into a comprehensive sleep health platform — capable of identifying and addressing a wide range of sleep disorders.
Detection
Detection
Support
Tools
Titanium outer shell
Dimensions – Width 8.0 mm; thickness 2.85–2.9 mm
Water Resistance – 5 ATM (suitable for swimming and showering)
PPG heart sensor, skin temperature sensor, 3D accelerometer
Rechargeable LiPo, 14.5–21.5 mAh (size-dependent), non-replaceable.
A battery life of up to 5-8 days & typically charges within 1 hour.
8 Sizes available (starting from 16.5 mm to 22.3 mm)
App Support – Android 5.0+ / iOS 10.0+
Connectivity – Ultra-low power Bluetooth 5.0
OTA Updates – Wireless firmware updates via Bluetooth
Data Storage – Up to 15 days on-device memory
