First-generation product — no historical cycle data to predict a successor
Full details →| Polar Vantage V | Fitbit Air | |
|---|---|---|
| Pricing | ||
| Starting price | $599 | $99★ |
| Subscription | ✓ None | ℹ️ Optional — $99/yr |
| Hardware | ||
| Weight | 39g | 12g★ |
| Water resistance | 5ATM | 50m |
| Battery | 8 days★ | 7 days |
| Always-on display | ✅★ | ❌ |
| GPS | ✅★ | ❌ |
| Cellular | ❌ | ❌ |
| Platform | iOS & Android | iOS & Android |
| Tier | Sports GPS | Fitness Tracker |
| Buy timing | ||
| Released | Oct 4, 2023 | May 7, 2026 |
| Cycle advice | bad | good★ |
| Deals advice | good | good |
| Next model | Polar Vantage V4 (2026) | — |
Polar Vantage V3 is one of the few sports GPS watches with on-demand ECG — usually only found on lifestyle smartwatches.
Running power measurement without a foot pod or chest strap — a significant training metric for pacing effort on hills and varied terrain.
The most detailed training load analysis in any sports watch: muscle groups targeted per session, recovery status per muscle, and long-term load trends.
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 $599 over 3 years · no required subscription.
8 days vs 7 days battery.
6 sensors.
12g · no required subscription.
Serious endurance athletes — particularly runners and triathletes — who want Polar's unmatched training load science and recovery guidance, combined with ECG health monitoring and running power in a premium package.
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 →