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Health technology, privacy-first design, and the research behind what a ring can actually measure.

A close-up of a smart ring on a finger, representing the wearable health tracking market Oura dominates but may not hold

Latest Privacy · Wearables 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 May 22, 2026 12 min read Read article

The Hardware Margin Nobody Talks About: Why Smart Rings Cost $30 to Build and $350 to Buy James Hoffmann May 21, 2026 12 min read

Why Your Health Data Doesn't Need a Cloud Every smart ring app ships your biometric data to a server before showing you your own sleep score. The cloud isn't there for your convenience. It's there for their business model. James Hoffmann May 21, 2026 11 min read

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LATEST ARTICLES

Smartwatch and wearable technology devices on a dark surface

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 May 21, 2026 11 min read

AZ Mobile ID Cover

Reverse Engineering Arizona's Mobile ID App What I found inside a state government digital identity application with 500K+ installations James Hoffmann Apr 23, 2026 11 min read

A serene bedroom scene representing quality sleep

How Pulsyn Calculates Your Sleep Score: A Transparent Look at Our Algorithm The complete math behind your sleep score. Personalized baselines, five weighted components, and how it compares to polysomnography. James Hoffmann Jan 14, 2026 11 min read