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Posts tagged: Oura

16 posts found

A medical stethoscope on a desk with clinical documents, representing the regulatory gap between wellness devices and validated medical equipment
FdaWellness DevicesMedical Devices

Your Smart Ring Is a Wellness Device, Not a Medical Device. Here's What That Actually Means.

The FDA's 19-page general wellness policy lets smart ring companies skip clinical validation entirely. Every wearable you have heard of lives inside that loophole. The difference between wellness and medical is not a matter of degree. It is a matter of whether anyone tested the accuracy before it shipped.

James Hoffmann James Hoffmann
May 31, 2026 12 min read
A person running on a treadmill in a lab setting, the exact environment where Stanford tested fitness trackers against clinical calorimeters
Calorie TrackingFitness TrackersWearable Accuracy

Why Your Wearable's Calorie Count Is Wrong by 27 to 93 Percent

A Stanford study tested seven fitness trackers against clinical instruments. Heart rate was accurate. Energy expenditure was off by 27 to 93 percent on every device. The calorie number on your screen is not a measurement. It is a guess.

James Hoffmann James Hoffmann
May 30, 2026 15 min read
A luxury ring display in a velvet case, the kind of presentation that signals a premium price before you ever see the numbers
OuraSmart RingsPricing

Oura Ring 5 Is $499. Here Is What Three Years Actually Costs.

Oura launched the Ring 5 at $499 with a mandatory subscription and a new AI coach fee. Over three years, the cheapest configuration totals $715. Here is the math, and why Pulsyn is building the alternative.

James Hoffmann James Hoffmann
May 29, 2026 12 min read
Abstract digital privacy visualization representing encrypted health data that never leaves your device
PrivacyReproductive HealthData Ownership

Your Fertility Data Is Evidence Now

In a post-Dobbs United States, fertility data from wearables has entered criminal prosecutions. Oura stores cycle data on AWS. Whoop stores it on their own servers. Pulsyn stores it on your phone, encrypted, with no cloud account.

James Hoffmann James Hoffmann
May 27, 2026 13 min read
A medical electrocardiogram monitor showing heart rhythm data, representing the raw physiological signal behind HRV analysis
HrvRecoveryWearables

What HRV Actually Measures and Why Your Recovery Score Is a Marketing Invention

HRV is not a score. It is a noisy physiological signal that consumer wearables clean, compress, and repackage as a recovery percentage with no medical validation. This post explains how the sausage is made, why the math does not support the marketing, and what Pulsyn does instead.

James Hoffmann James Hoffmann
May 26, 2026 12 min read
A close-up of a smart ring on a finger, representing the wearable health tracking market Oura dominates but may not hold
OuraIpoSmart Ring

Oura Just Filed for IPO. Here Is Why It Will Flop.

Oura filed for its $11 billion IPO with 5 million subscribers and $2 billion in projected revenue. The catch: its core business model is a subscription paywall on health data that competitors already offer for free, sitting on top of a canceled Pentagon contract and an active class-action lawsuit.

James Hoffmann James Hoffmann
May 22, 2026 12 min read
Smartwatch and wearable technology devices on a dark surface
SubscriptionsWearablesOura

The Subscription Trap in Consumer Health

Most health wearables are sold at or near cost so manufacturers can charge you forever. Here is what Oura, Whoop, and Fitbit actually cost over three years, and why Pulsyn is building a ring that does not need a subscription.

James Hoffmann James Hoffmann
May 21, 2026 11 min read