Journal
Hiyd and wearable news and updates
What we are learning about continuous health tracking, the sensors behind it, and how Hiyd is being built.
Wearable Health Monitor Guide 2026: What to Look for Before You Buy
A practical buyer's guide to wearable health monitors in 2026. Covering key metrics, form factor trade-offs, real cost over two years, and the five questions to...
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What Your Resting Heart Rate Is Telling You (And How to Track It Properly)
Your resting heart rate is one of the simplest numbers your body produces, and one of the most honest. Here is what it actually measures, what...
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Wearable Blood Pressure Monitors in 2026: How Accurate Are They Really?
Wrist wearables promise continuous blood pressure readings, but the accuracy limitations are real. Here's what the validation data actually shows in 2026.
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What Is HRV and Why Should You Track It Every Day in 2026?
HRV measures the variation between heartbeats and is one of the most useful health signals you can collect. Here is what it measures, what affects it...
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The Watch Enthusiast's Guide to Health Tracking in 2026
A practical guide for watch collectors and enthusiasts who want health data in 2026 without replacing the watches they actually wear.
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Why Watch Collectors Are Turning to Invisible Health Trackers in 2026
Watch collectors have always faced a choice between health tracking and wearing the watches they love. In 2026, that choice is disappearing, and here is why.
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VO2 Max Tracking: What It Is, Why It Matters, and How to Improve It in 2026
A clear breakdown of VO2 max. What it measures, why it matters for long-term health, how wearables estimate it, and what actually moves it in the...
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Wearable for Stress Management 2026: How HRV and Recovery Scores Reflect Mental Load
How HRV and recovery scores in 2026 wearables capture mental and psychological stress, and what those signals can and cannot tell you.
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How to Track Macros and Biometrics Together for a Complete Health Picture in 2026
A practical guide to tracking macros and biometrics together for a complete health picture, and why a unified view of both data streams reveals patterns that...
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Sleep Staging Explained: How Your Health Tracker Knows When You're in Deep Sleep
A plain-language guide to sleep staging. What the four stages are, how wrist-based trackers detect them without an EEG, and how to read the data without...
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How to Improve Your Sleep Recovery Score: A Data-Driven Guide for 2026
What a sleep recovery score actually measures, which variables move it most, and how to improve it, including the nutrition connection most trackers miss.
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The Real Total Cost of WHOOP vs Oura vs Garmin Over Three Years
A plain-language breakdown of the real three-year cost of WHOOP, Oura Ring, and Garmin. Device costs, subscriptions, and hidden fees compared.
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