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Pulsyn

Rune 1

Every insight Oura charges $5.99/month for is free here. An AI that runs entirely on your phone. $160 once, nothing more required.

  • Core features free — no subscription
  • On-device AI included
  • Ships Q3 2026
Pulsyn Rune 1 smart ring in Black Basalt
  • 01

    Insights Oura charges $5.99/mo for. Free here, always.

  • 02

    On-device AI included free. Runs on your phone. Zero bytes uploaded.

  • 03

    7-day battery. 60 days with the charging case.

  • 04

    Need cloud AI? Pulsyn Pro adds it for $6/mo. Zero data retained.

Rune 1 colorways and reservation

Rune 1

Privacy-first smart ring

$160 USD

1-year warranty Core features free forever Free US shipping
iOS Android
Visa · Mastercard · Amex · Crypto
Color / Finish

Add-ons

Not sure of your size? Open the sizing guide

Your data stays on your phone by default. Pulsyn Pro adds opt-in encrypted cloud sync, zero-knowledge, on EU servers.

Health, in full

Most rings give you a score. Rune 1 gives you the reasoning.

Biological age, an eight-hour energy forecast, your real sleep architecture, and a coach that learns you. Computed on your phone, ready when you wake up.

Readiness
0 / 100

Sleep, HRV and recovery, weighed together into one honest call on your morning.

Body Battery
0 %

Energy left in the tank, with the next eight hours forecast.

7a11a3p7p
Training Load

ACWR 0.00

Acute load against chronic. In range, so you can push.

Biological Age
0 years

Thirteen biometric inputs estimate the age your body is keeping, not the one on your passport.

VO2max
0 ml / kg / min
Fair Elite

ACSM percentile bands, with 30, 90 and 365-day trends.

Sleep Architecture

Not a sleep score. The shape of your whole night.

Deep REM Light Awake
Early Signals
Jet-lag detected, recovery plan adjusted
Temperature and resting HR drifting up

Wellness flags from your own baseline. Insight, never diagnosis.

Personal Science

Does magnesium actually help you sleep?

Magnesium & deep sleep Day 14 / 21

Tracking +11 min deep sleep so far, confounds checked.

Baseline window, effect-size math and a written report. A lab on your finger.

Correlation Engine

Finally know what is wrecking your sleep.

  • Late caffeine Deep sleep
  • Evening walk Resting HR
  • Screens past 11 Sleep onset
Milo

A coach that runs on your phone and remembers you.

Milo writes your weekly plan, hands you a morning briefing, and adapts as it learns your patterns. No account, no cloud, no internet required.

On-device Remembers you Weekly plans

Your readiness is up 9 points since you moved dinner earlier.

I kept your Thursday run light. Your load was climbing.

Ran on-device, 0 bytes uploaded

Example readouts shown. Your numbers are yours, computed on your phone.

Built without a paywall

The features Oura charges for. Free here.

Oura's $5.99/month membership gates the insights you paid the hardware to get. Pulsyn gives all of that for free — with on-device AI on top.

Free · Always

$0 /month

Everything you need to understand your health, on your device. No account required to unlock the AI.

  • All health tracking Heart rate, HRV, SpO₂, skin temp, sleep stages, activity
  • Readiness score
  • Strain & Body Battery
  • Smart Alarm
  • Journal + daily reports
  • Proactive health alerts
  • Milo Coach Weekly plans, morning briefings, adaptive guidance
  • On-device AI Pulsyn fine-tunes of Qwen 3.5 (0.8B & 4B) · 0 bytes uploaded

$72/year you keep vs Oura membership.

Oura charges $5.99/mo for equivalent core insights. Competitor pricing from their own store.

On-device AI · 0 bytes uploaded · No internet required

Pulsyn Pro

$6 /month

Everything in the free tier, plus cloud AI and deeper personal science. Optional — your free tier never expires.

  • Cloud AI Open-weight large cloud models via Fireworks.ai · zero data retained
  • Cross-device sync End-to-end encrypted · EU servers · zero-knowledge
  • N-of-1 Experiments AI-designed personal science protocols
  • Priority support

Cloud AI requests are processed by Fireworks.ai (US) and are never retained. Your stored health data is end-to-end encrypted on EU servers — we hold encrypted blobs we can't read.

Free tier is free forever. Pro can be cancelled anytime. Oura pricing from their own store; figures may change.

Precision Health Tracking

Every signal. Processed on your finger. Never sent anywhere.

Stress + Recovery

24/7

Know Your Stress Before You Feel It

Continuous heart rate and HRV tracking reveals your body's stress response and recovery state, so you can act before burnout hits.

SpO₂ Accuracy

+/−2%

Breathe Easy, Day and Night

Track blood oxygen levels in real time.

Temp Precision

+/−0.1°C

Catch Illness Before Symptoms Start

Detects subtle skin temperature shifts that can signal illness onset or recovery before you notice.

Sleep + Activity

5 stages

Sleep Scored. Activity Logged. Zero Effort.

Auto-detects activity type and classifies each sleep stage so your day and night are tracked without manual input.

Temperature Trends

Cycle-aware

Women's Health, In Sync

Temperature trends help reveal cycle patterns and fertile windows, adding context to energy and recovery.

Personal Science Lab Pulsyn Pro

Your ring, running experiments on you.

Describe what you want to test. Pulsyn designs the experiment: baseline, intervention, measurement. Your ring collects the data silently. You just log compliance. The app shows you what's actually moving the needle.

  1. 1

    Describe

    Tell the app what you want to test. A supplement, a sleep habit, a morning routine. The AI designs the protocol: baseline window, intervention schedule, and the biometrics that matter.

  2. 2

    Measure

    Your ring runs the experiment automatically. Baseline first, then intervention, collecting HRV, sleep stages, skin temperature, and activity. No manual logging required.

  3. 3

    Discover

    See your directional trend against your own baseline. No spreadsheets, no guesswork, no causal claims. Just clean, personal evidence of what's actually moving the needle.

No other wearable gives you a structured, AI-designed personal experiment with automatic biometric measurement. Not Oura. Not Garmin. Not Apple Watch.

Pulsyn app Experiments screen showing active experiments including No caffeine after 2pm on Day 3 of 7, and supplement templates like Magnesium Glycinate

Test. Measure. Grow. On your own data.

Your body keeps a journal.
We don't get to read it.

By default, everything runs on-device. Milo reads your signals, encrypts them, and answers you — all locally, no internet required. Upgrade to Pulsyn Pro and your data syncs end-to-end encrypted to our EU servers as blobs we can't read; cloud AI requests run on Fireworks.ai and are never retained.

Rune 1

Reads your signals

Your phone

Where everything happens

  • Encrypts at rest
  • Milo runs on-device

Our server

0 records of you

A day with Rune 1

You forget you are wearing it. The day is where you feel it.

Morning

07:14

You wake. Before the kettle boils, the ring already knows how the night went and what today can take.

Readiness 07:14
Sleep score 88
Body battery 96%
HRV 52ms ↑
SpO₂ 97%
Sleep time 8h 06m
Skin temp +0.1°C
Milo

You recovered well. Good morning for the hard session you planned. Keep caffeine before noon.

Day

14:32

A meeting runs hot. Your stress climbs before you notice it, so Milo flags it and shows what is left in the tank.

Stress, caught early 14:32
64 stress, rising since 14:05
HRV
38ms ↓ from 52ms
Steps 4,280

54% toward 8,000 goal

Body battery 58%

Forecast 41% by 22:00 at this pace.

Evening

21:48

The tank is running low. The ring suggests winding down now so tomorrow starts where today did.

Wind down 21:48
23% body battery left
If you stay up 9% by 01:00
Steps today 7,840 ✓
Stress peak 64 at 14:32
HRV 38ms ↓ low today
Milo

You are low. Start winding down in the next half hour and tomorrow should open near where today did.

Night

03:20

You sleep. The ring maps every stage so the morning score is built on what your body actually did.

Sleep architecture 03:20
SpO₂ avg 97%
SpO₂ min 94%
Skin temp +0.2°C
Deep 1.7h
REM 1.9h
Light 4.2h
Awake 0.3h

Oura's subscription is the product. We're not built that way.

Every insight Oura gates behind $5.99/month is free on Pulsyn. Over five years, their membership alone adds up to more than four Rune 1s.

Pulsyn

$160

No subscription

Oura

$758

$399 + $5.99/mo

RingConn

$299

No subscription

Samsung

$399

No subscription

$598 less than Oura over five years — and their free tier doesn't include AI. Ours does. Five-year totals; competitor figures from their own pricing.

Pulsyn

$160

5-year cost

Subscription
None
On-device AI
Data leaves device
No by default
Biological Age
N-of-1 Experiments
Body Battery forecast
Offline AI

Oura

$758

5-year cost

Subscription
$5.99/mo
On-device AI
Data leaves device
Yes
Biological Age
N-of-1 Experiments
Body Battery forecast
Offline AI

RingConn

$299

5-year cost

Subscription
None
On-device AI
Data leaves device
Yes
Biological Age
N-of-1 Experiments
Body Battery forecast
Offline AI

Samsung

$399

5-year cost

Subscription
None
On-device AI
Data leaves device
Yes
Biological Age
N-of-1 Experiments
Body Battery forecast
Offline AI

Competitor pricing from each maker's own store. Oura five-year total assumes the $5.99 monthly membership. Device prices and terms change; check the current figures before you buy.

Reserve with nothing to lose

A short list of promises, written plainly.

  • Free US shipping On every order, no minimum
  • 30-day returns Full refund if it is not for you
  • 1-year warranty Extend to 2 years for $30
  • Card and crypto Pay by card or with Bitcoin
  • Sizing kit included Try every size before you commit

Secure checkout by card or crypto. $160 once, no subscription.

Wearable health gets better when the data stays with the person wearing it.
Pulsyn privacy principle
MIT Technology ReviewNISTIBM Security

Public statements and standards we build toward. None of these organizations endorse or are affiliated with Pulsyn.

Your health, in full. On your finger. On your phone. Nowhere else.

  • $160 once
  • No subscription
  • Ships Q3 2026

500 units, first run. The $10 deposit is fully refundable.

Reserve your ring

$10 deposit · 500 units available

$10

Secure payment · $10 credited to full order

Questions.

$160

Titanium Silver