Tool / wearable
Apple Watch
Last updated Sat May 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time)
Why it matters for longevity tracking
Apple Watch (Series 4+) has FDA-cleared:
- Single-lead ECG — detects AFib, sinus rhythm, low/high HR.
- AFib history — estimates AFib burden over time.
- Fall detection — emergency SOS auto-dial.
- Pulse oximetry — SpO2 spot-check (limited availability by region/regulation).
Plus general:
- HRV (intermittent measurements).
- Resting HR trends.
- Sleep stages (since Series 8, reasonable but not best-in-class).
- Workout tracking with GPS.
- Cycle tracking.
AFib detection in older adults
The AFib screening function has identified previously-unknown AFib in thousands of users in the Apple Heart Study and similar deployments. This is genuinely useful given AFib’s under-diagnosis and the substantial stroke-reduction benefit of anticoagulation when AFib is caught.
Trade-offs vs competitors
- Daily charging (vs. Oura’s week, Garmin’s weeks).
- Best-in-class app ecosystem, third-party app integration.
- Better sport tracking than Oura, less than Garmin.
- Less detailed sleep / HRV trends than Oura or WHOOP.
- iPhone-only.