First-generation product — no historical cycle data to predict a successor
Full details →| Apple Watch Ultra | Fitbit Air | |
|---|---|---|
| Pricing | ||
| Starting price | $799 | $99★ |
| Subscription | ✓ None | ℹ️ Optional — $99/yr |
| Hardware | ||
| Weight | 63g | 12g★ |
| Water resistance | 100m★ | 50m |
| Battery | 2.1 days | 7 days★ |
| Always-on display | ✅★ | ❌ |
| GPS | ✅★ | ❌ |
| Cellular | ✅★ | ❌ |
| Platform | iOS only | iOS & Android |
| Tier | Sports GPS | Fitness Tracker |
| Buy timing | ||
| Released | Sep 18, 2026 | May 26, 2026 |
| Cycle advice | good | good |
| Deals advice | neutral | great★ |
| Next model | — | — |
The Ultra 4 lasts roughly twice as long as the Series 12, with up to 45 hours of GPS workout tracking in Max Extended Workout mode. Satellite Emergency SOS works without cellular or WiFi coverage.
The new health sensing system samples heart rate every five seconds all day and HRV every five minutes, feeding a 0–10 readiness score.
The 49mm titanium case and 3000-nit display make this watch usable in full direct sunlight and water depths up to 100m (recreational scuba diving to 40m).
Unlike WHOOP, there is no mandatory membership — pay $99 once and use Fitbit Air with the free Google Health app. Google Health Premium ($9.99/month) is optional.
Continuous heart rate, SpO2, HRV, and skin temperature tracking plus background FDA-certified AFib detection, in a 12g pebble designed to be worn and forgotten.
A week between charges, with a 5-minute top-up delivering a full day of use — significantly less downtime than WHOOP's slide-on charging system.
The right pick depends on what you optimize for.
$396 vs $799 over 3 years.
7 days vs 2.1 days battery.
12 sensors · 0.2 Hz HR sampling.
12g.
Serious athletes, trail runners, triathletes, and outdoor adventurers who need the most durable, most accurate GPS watch Apple makes. Also for iPhone users who simply want the best Apple Watch regardless of sport, and value the extra battery life over the Series 12.
Full details →Health-focused users who want passive, 24/7 biometric tracking without a screen on their wrist. Particularly strong for those drawn to WHOOP but put off by the subscription model — the Fitbit Air delivers comparable core health data for $99 outright. Works with both iOS and Android.
Full details →