First-generation product — no historical cycle data to predict a successor
Full details →| Fitbit Air | COROS Vertix | |
|---|---|---|
| Pricing | ||
| Starting price | $99★ | $699 |
| Subscription | ℹ️ Optional — $99/yr | ✓ None |
| Hardware | ||
| Weight | 12g★ | 73g |
| Water resistance | 50m | 10ATM★ |
| Battery | 7 days | 140 days★ |
| Always-on display | ❌ | ❌ |
| GPS | ❌ | ✅★ |
| Cellular | ❌ | ❌ |
| Platform | iOS & Android | iOS & Android |
| Tier | Fitness Tracker | Sports GPS |
| Buy timing | ||
| Released | May 7, 2026 | Oct 1, 2023 |
| Cycle advice | good★ | bad |
| Deals advice | good | good |
| Next model | — | COROS Vertix 3 (2026 or 2027) |
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.
No other GPS watch currently on the market delivers 140 hours of GPS tracking — enough for most ultra-endurance events and multi-day mountain traverses.
GPS + GLONASS + Galileo + BeiDou + QZSS with dual-frequency reduces error in challenging terrain to near-meter precision.
Military-grade scratch and impact resistance for the harshest environments: extreme altitude, cold, and sustained physical stress.
The right pick depends on what you optimize for.
$396 vs $699 over 3 years · no required subscription.
140 days vs 7 days battery.
5 sensors · 0.5 Hz HR sampling.
12g · no required subscription.
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 →Expedition athletes, mountaineers, and ultra-endurance competitors who do multi-day or multi-week events where charging is impossible. If you need GPS tracking for 140 continuous hours, no other watch comes close.
Full details →