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 →Late in cycle — a new model is likely coming
Best for: Expedition athletes, adventure racers, triathletes, mountaineers, and divers who need the most capable and durable GPS watch Garmin makes. Also for anyone who wants Garmin's best — full stop.
Full details →| Fitbit Air | Garmin Fenix | |
|---|---|---|
| Tier | Fitness Tracker | Sports GPS |
| Platform | iOS & Android | iOS & Android |
| Battery | 7 days | 18 days |
| Always-on display | ❌ | ✅ |
| GPS | ❌ | ✅ |
| Cellular | ❌ | ❌ |
| Released | May 7, 2026 | Aug 14, 2024 |
| Cycle length | — | 938 days |
| Cycle advice | good | bad |
| Deals advice | good | good |
| Next model | — | Garmin Fenix 9 (H2 2026) |
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.
First Fenix to include a speaker — enabling phone calls, Bluetooth audio, and voice prompts directly from the watch.
AMOLED for the best display at 18 days. Solar MIP for up to 48+ days in expedition conditions where charging is impossible.
EN13319 dive mode (up to 40m), MIL-STD-810 shock resistance, and TopoActive maps covering 100+ countries — the most capable outdoor watch in Garmin's lineup.