9 articles

Wearable Tech Reviews

In-depth reviews of health tracking wearables, CGMs, and diagnostic devices.

Best Fitness Trackers for Longevity in 2024: HRV, Sleep & Recovery Ranked

We tested 8 fitness trackers for 6 months — measuring HRV accuracy, sleep staging, recovery scoring, and long-term health trend data. Here's what actually works.

Marcus Webb5 min read

Read article

88/100

Garmin vs WHOOP: Which Training Wearable Is Right for Longevity?

Garmin and WHOOP take fundamentally different approaches to health tracking. Garmin is a GPS sports computer that also tracks health. WHOOP is a recovery platform that also tracks activity. Here's the head-to-head for longevity-focused users.

7 min readRead article

82/100

Apple Watch for Longevity: Health Features Ranked by Evidence

Apple Watch has 30+ health features. Most are marketing. These 7 are genuinely clinically meaningful — and two have FDA clearance. Here's what actually matters.

6 min readRead article

93/100

WHOOP 4.0 Review: The Gold Standard for HRV & Recovery Tracking

After 12 months of continuous wear and cross-validation against medical-grade ECG, we give our definitive verdict on WHOOP 4.0 — the most sophisticated recovery tracker available.

9 min readRead article

88/100

Garmin Fenix 7 Review: The Best GPS Watch for Longevity Tracking

The Garmin Fenix 7 is the only GPS watch that takes longevity biomarkers seriously. After 8 months of daily wear, here is our full verdict on HRV Status, Body Battery, and VO2 max tracking.

7 min readRead article

91/100

Best CGMs for Non-Diabetics: Are They Worth It in 2024?

Continuous glucose monitors have gone mainstream for longevity optimization. We wore four devices for 90 days to find the best.

1 min readRead article

91/100

Oura Ring Gen 3 Review: The Best Sleep Tracker for Longevity?

After 8 months of continuous wear and cross-validation against lab-grade sleep studies, we give our definitive verdict on the Oura Ring Gen 3.

5 min readRead article

88/100

Dexcom Stelo Review: The First CGM Designed for Non-Diabetics

The Dexcom Stelo is the first FDA-cleared continuous glucose monitor for healthy adults. After wearing it for three 14-day cycles, here's what we learned about metabolic health, glucose patterns, and whether it's worth the cost.

7 min readRead article

90/100

WHOOP 4.0 vs Oura Ring Gen 3: Which Is Better for Longevity?

The two most popular longevity wearables go head-to-head across HRV, sleep staging, recovery, and real-world usability. After wearing both simultaneously for 6 months, here's our verdict.

7 min readRead article