Posts tagged: Privacy

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Wearable resting on a notebook beside charts, illustrating how routine ring data looks anonymous but retains identifying patterns

Health Data · Privacy · Smart Ring

De-Identified Ring Data Is Not Anonymous: What Re-Identification Studies Actually Prove

Removal of your name does not make ring data anonymous. Studies show a few days of heart rate, sleep timing, and steps can single you out, and I explain what that means before you tap share.

James Hoffmann

Sep 13, 2026 1 min read

Bedside lamp glowing beside an unmade bed at night, showing the quiet bedroom context where alerts would interrupt sleep

Stress · Sleep · Privacy

Why I Told North to Stay Quiet at Night Even When Strain Spikes

Nighttime heart rate spikes look urgent but rarely mean anything actionable at 2 a.m. This memo explains why I chose to keep North quiet overnight and deliver Strain context in the morning instead.

James Hoffmann

Sep 13, 2026 1 min read

A glucose test strip and blood sample, representing the new frontier of continuous glucose monitoring data that Oura is now integrating into its platform

Privacy · Wearables

Oura Is Tracking Your Blood Sugar Now. Your Insurance Company Will Want That Data.

Oura just integrated with Dexcom Stelo for continuous glucose monitoring. Here is what happens when your sleep tracker knows your blood sugar, and why your insurance company will want that data on a server.

James Hoffmann

Jun 23, 2026 1 min read

A stack of insurance paperwork and documents on a desk, representing the fine print in wearable data sharing agreements

Privacy

Your Health Insurance Company Wants Your Wearable Data. Here Is What That Actually Means.

John Hancock, UnitedHealthcare, and Aetna all offer premium discounts for sharing wearable data. The fine print lets them use that same data to raise your rates. Here is how the system works and what you can do about it.

James Hoffmann

Jun 16, 2026 1 min read

Privacy · Wearables

The Secondhand Smart Ring Problem: Why Selling Your Ring Doesn't Erase Your Data

You factory-reset your Oura before listing it on eBay. The buyer gets a clean ring. Your heart rate data from the last 18 months is still in their cloud.

James Hoffmann

Jun 12, 2026 1 min read

A pile of obsolete technology and electronic waste in a dimly lit storage space. The physical remnants of devices that outlived their cloud backends.

Privacy · Wearables

What Happens to Your Health Data When the Company Dies

When Intel shut down Basis in 2016, the devices did not break. The servers did. The cloud model turns your health history into a loan, and the company owns the vault. Pulsyn stores everything on your phone because your phone is the only hardware you actually own.

James Hoffmann

Jun 7, 2026 13 min read

A digital privacy concept image showing data security and protection themes

Privacy · Wearables

Your Wearable Data Isn't Covered by HIPAA. The FTC, Congress, and 20 States Are Trying to Fix That.

Your fitness tracker data is not protected by HIPAA. The FTC, Congress, and 20 states are trying to fix that, but legislation only regulates what companies can do with data they already possess. Pulsyn removes the server entirely.

James Hoffmann

Jun 5, 2026 11 min read

A smartphone screen showing a minimal dark interface without login forms or password fields

Privacy · Rune 1

How Pulsyn Works Without a Login Screen

Most health apps start with a login form because their business model requires your email before their product requires your data. Pulsyn starts with a heart rate graph because the app stores everything locally on your phone and has nothing to authenticate against.

James Hoffmann

Jun 4, 2026 11 min read

A data visualization dashboard showing algorithmic learning patterns, representing how smart rings build personalized baselines over time

Sleep · Privacy · On Device Ai

How Smart Rings Learn Your Body (and Why the First Two Weeks Matter)

Your smart ring is guessing for the first two weeks. Every sleep score and recovery metric is built on population averages until the algorithm learns what normal looks like for you. Most companies do not tell you this clearly. Pulsyn does.

James Hoffmann

May 30, 2026 12 min read