Discover what drives and drains you
Spot what helps you
feel your best
Your sleep, activity, stress and daily routines all shape how your body spends and replenishes its resources. We'll show you what connects them over months.
Trusted by
What is your day costing you?
Understand where your energy goes. Choose how to spend it.
Analogy time: your body runs on a 'budget' of resources.
By tracking how your body is responding to daily demands, Polsen's Reactivity Monitor™ shows you what your body is allocating resources for, and how long it takes to settle after it spikes. You can tell which demands are worth it, and restore them when needed.
Powered by our proprietary Reactivity Monitor™
Our PPG and motion sensors capture your heart rate every 10 seconds, delivering a live, minute-by-minute view of your body's reactivity, calibrated to your own baseline, never against population averages.
Spot what helps you
Sleep
Get the sleep that truly restores you
Activity
Discover which workouts work for you
Stress
Spot what gets under your skin
Cycle tracking
Work with your cycle, not against it
Why it matters for years to come
Pressure you don’t notice today
still adds up
A few demanding days are part of living life. But when demands consistently exceed your body's ability to regulate itself, wear and tear starts to build. In science, this is called Allostatic Load, something that has been linked to 7 out of 10 major health conditions¹.
Our Cumulative Stress trend helps you spot the early signs, so you can start protecting your health today.
¹Juster R-P et al., Int J Health Sci, 2016. pmc.ncbi.nlm.nih.gov/articles/PMC4791152
How we’re different
Live body reactivity monitoringEvery rise and dip, no scores
Metrics no other tracker surfacesPhysiological stress frequency and recovery
Built to catch risk of wear and tear earlyTrack the signs in your Cumulative Stress trend
No subscription, no hidden costsNo incentive to keep you hooked
Your data stays yoursStored on your phone by default, never sold
Protects your attentionNo constant pings, only when it matters
Unmissable features
See it in action
Reactivity Monitor™Your live body’s reactivity as you go through your day
Sleep SummarySee how well your body replenished overnight, and what shaped it.
Long-term patternsYour cumulative stress, sleep, and activity data in one place, so you can see how they interact over time.
Silent AlarmSchedule the watch to vibrate at your chosen time
Breathing Session (iOS only)Follow a guided breathing exercise with live HRV feedback
Daily Mood LogReflect on your day and add the context data can’t capture
Activity RecordingRecord any workout with real-time heart rate and GPS (iOS only)
Continuous Heart RateExplore your heart rate variations, minute by minute
InsightsSpot pattern shifts, with tips on how to act on them
Data ExportDownload your full health history, any time
How we compare
Continuous monitoring.
Deeper insights.
| Other health trackers | ||
|---|---|---|
| Sampling | Continuous, 24/7 | Every few minutes |
| Body’s reactivity | Minute-by-minute timeline | |
| Stress frequency & recovery over time | ||
| Sleep, activity & heart health | ||
| Scores & streaks | None | Yes |
| Notifications | Only when it matters | Frequent by default |
| Subscription | $0 | $71–$359/yr |
| Data usage | Never sold, stored in EU | Varies by region |
See the full comparisonvs Oura, Apple Watch, WHOOP
Fast shipping
Free above $100
Pay in 3 or 6 with Shop Pay
Interest-free installments
30-day returns
Full refund guaranteed
HSA/FSA eligible
Covered by your health plan
Real people.
Real results.
“It gives me reassurance that I’m not overworking myself”
Tracy · Clinician & Podcast Host
“It’s the health tracker I wanted from my Apple Watch”
Alex · Student
“It won’t distract you from whatever you’re doing by beeping”
Lori · Yoga Teacher
“I can use it to conserve energy, as opposed to being so activated”
DJ Paris · Sales Director
“It’s made me be able to advocate for myself better”
Amy · Corporate Secretary
“It gave me my sense of confidence back”
Juliette · Project Manager
Grounded in science
Built by scientists,
validated by research
Research
Partnering with leading universities to advance the science of the stress response through active research programs worldwide (NUDZ, Stress in Action).
Como 1907
Helping Como 1907's athletes understand how their bodies absorb training demands and recover outside the pitch, so they can prevent injury and perform their best on the pitch.
TED
Giving TED speakers the tools to step on stage energised and deliver their best talk.
Want to know more?
What is the difference between NOWATCH and Polsen?
Polsen Health is our company's new name. We've evolved to reflect our mission in preventative health: putting the people who wear our technology first, not just the device itself. Your NOWATCH B and X products stay the same and work with the Polsen Health app.
How do Polsen watches work?
The Polsen watch is a screenless health tracker powered by PPG and motion sensors. It captures your heart rate every 10 seconds, continuously, delivering a live, minute-by-minute timeline of how reactive your body is to daily demands, calibrated to your own baseline. Every metric it tracks, from sleep and activity to stress duration, frequency and recovery, lives in the Polsen app, where Insights flag what shifts and help you build long-term healthy habits.
How are Polsen watches different from other wearables?
Most trackers tell you how you slept, then use it to predict how ready you are for the day. The Reactivity Monitor™ shows the spike and the comeback, minute by minute: how your body responds to daily demands, in the context of your sleep and activities, and how quickly it returns to baseline. You can understand how your body spends its resources, and learn to protect them over time. No scoring, no information lost. No subscription, no dopamine loops. Your data is stored on your phone by default, and on EU-based servers under European law if you choose to sync. Never sold.
Do Polsen watches track physical activity, steps, and sleep?
Yes, Polsen watches track all the basics: activity, steps, sleep duration, night HRV (heart rate variability), and resting HR (heart rate), plus, unique stress metrics continuously captured in the Reactivity Monitor™.
How are Polsen watches manufactured?
Our watches are designed at Polsen Health HQ in Amsterdam and assembled in Europe. All components including our research-grade sensors are specially selected to be both durable and skin-safe. We only use high-quality materials to ensure the best experience.
Do I need a subscription to access all my data and features?
No, you do not need a subscription. As soon as your Polsen watch is out of the box, the companion app and all features are completely free to use. Your health data belongs entirely to you, and we don’t charge you for core functionalities.
How does Polsen Health manage and store user data?
We respect your privacy and never access your data unless you choose to share it. Shared data is securely stored on EU-based AWS servers (Frankfurt) with advanced encryption and is used only to improve the app and algorithms. You can download your data anytime, and we will never sell or distribute it to third parties.
Where does Polsen Health ship to?
Currently, we ship within the European Union and to Canada, Norway, Switzerland, Turkey, the United Kingdom, and the United States of America.
Customs regulations prevent us from shipping elsewhere, but we are exploring how to expand our shipping destinations to include new countries.
Our Fulfilment Team carefully packages your order at Polsen Health HQ in Amsterdam.
How long does it take to ship?
We aim to fulfill orders within 2 business days of purchase. Delivery times vary by location, with typical times as follows:
Benelux: Next business day
EU & EEA: 2-4 business days
Switzerland: Up to 4 business days
USA & Canada: Up to 5 business days
Once your package is shipped, you will receive an email and tracking code from our shipping partner, DHL Express.
What is your return policy?
We offer a 30-day return policy from the day you receive your order. You can return undamaged items in their original packaging for a full refund or a replacement.
Your feedback is important. Contact our Customer Care Team with any concerns or complaints to help us improve.
What should I do if I have questions about my Polsen watch?
For further information about your Polsen watch and the app, troubleshooting tips, and solutions, please visit our Help Center. If you still need assistance, don’t hesitate to reach out by filling out our contact form. You can also reach out through live chat in the Help Center from Monday to Friday during business hours (CET).
