First-generation product — no historical cycle data to predict a successor
Best for: 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 →This model is no longer sold new. It has been replaced by the Garmin Forerunner 970.
Best for: Competitive runners, triathletes, and ultramarathon runners who want full maps, running dynamics, and premium build.
Full details →| Fitbit Air | Garmin Forerunner 965 | |
|---|---|---|
| Tier | Fitness Tracker | Sports GPS |
| Platform | iOS & Android | iOS & Android |
| Battery | 7 days | 23 days |
| Always-on display | ❌ | ❌ |
| GPS | ❌ | ✅ |
| Cellular | ❌ | ❌ |
| Released | May 7, 2026 | Mar 1, 2023 |
| Cycle length | — | 806 days |
| Cycle advice | good | superseded |
| Deals advice | good | clearance |
| Next model | — | — |
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.
Turn-by-turn navigation on full TopoActive maps — essential for trail running and mountain racing.
Cadence, stride length, vertical oscillation, ground contact time, and running power.
Enough for week-long trail ultras without a charge.