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.

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...
Read article
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.
Read article
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.
Read article
Recovery Tracker 2026: How Wearables Measure Readiness and When to Trust the Data
A clear-eyed look at how wearables actually measure recovery in 2026. What the science supports, where the data falls short, and how to use readiness scores...
Read article
Oura Ring Subscription Cost in 2026: What You Actually Pay Over 3 Years
The Oura Ring's sticker price isn't the full story. Here's exactly what the ring, the mandatory membership, and three years of ownership actually costs in 2026.
Read article
Oura Ring 5 Review 2026: Real-World Health Tracking After 90 Days
A 90-day real-world review of the Oura Ring 5. What it tracks well, where it falls short, and whether the subscription model is worth it in...
Read article
Is WHOOP 5.0 Worth It in 2026? An Honest Look for Non-Athletes
An honest assessment of whether WHOOP 5.0 is worth the subscription cost in 2026 for health-conscious people who are not competitive athletes.
Read article
Is Hiyd Right for You? An Honest Pre-Purchase Checklist for 2026
Not every health tracker suits every person. An honest checklist to help you decide whether Hiyd fits your life, no hype, no sales pressure.
Read article
HRV Monitor Buying Guide 2026: What the Numbers Really Mean for Your Health
A practical guide to heart rate variability monitoring in 2026. What HRV actually measures, how to read your numbers in context, and what to look for...
Read article
How to Read Your Health Data: A Beginner's Guide to Biometric Insights in 2026
A beginner's guide to understanding biometric data from health trackers. What each metric measures, how to interpret trends, and how to start seeing patterns rather than...
Read article
How to Choose a Health Tracker in 2026: The 8 Questions You Must Ask First
Before you spend anywhere from $150 to $500 on a health tracker in 2026, eight questions will cut through the noise. Answer them honestly and the...
Read article
How Hiyd Tracks Your Health Without You Noticing: The Science Behind the Sensor
How Hiyd's microsuction-mounted sensor tracks heart rate, HRV, sleep staging, and more. Continuously, invisibly, without asking you to change the watch you already wear.
Read article