Apple Watch Series 11 topped a WSJ health‑tracker comparison against Oura, Fitbit and Whoop.
The Wall Street Journal ran a ten‑day, real‑world test from Feb 1‑10 2026, measuring sleep quality, resting heart rate accuracy, VO₂ max estimates, stress detection and battery life. The Series 11 scored 8.5 out of 10, Oura 7.8, Fitbit 7.2 and Whoop 7.0. Apple led in sleep staging and VO₂ max, while Oura edged out on resting‑heart‑rate consistency.
The numbers matter because they translate the hype into measurable performance. A higher score suggests more reliable biometric data for everyday users, not just athletes. It also shows Apple’s incremental sensor upgrades are catching up to devices that specialize in a single metric.
Still, the gap isn’t huge, and all four devices still require a wrist or finger to be worn constantly—a reminder that convenience still costs a bit of accuracy.