Wear Radar

Fitbit AirvsGarmin Forerunner 265

13d vs 7d
battery life
Garmin Forerunner 265 lasts longer
$350
price gap
Fitbit Air cheaper
0.5 Hz
HR sampling
Fitbit Air only — Garmin Forerunner 265 undisclosed
35g
lighter
Fitbit Air
Fitbit Air
Buy/Wait:good

First-generation product — no historical cycle data to predict a successor

Full details →
Garmin Forerunner 265
Buy/Wait:superseded

This model is no longer sold new. It has been replaced by the Garmin Forerunner 570.

Full details →
Fitbit AirGarmin Forerunner 265
Pricing
Starting price$99$449
Subscriptionℹ️ Optional — $99/yrℹ️ Optional — $70/yr
Hardware
Weight12g47g
Water resistance50m5ATM
Battery7 days13 days
Always-on display
GPS
Cellular
PlatformiOS & AndroidiOS & Android
TierFitness TrackerSports GPS
Buy timing
ReleasedMay 7, 2026Mar 1, 2023
Cycle advicegoodsuperseded
Deals advicegoodclearance
Next model

Health Sensors

Fitbit Air only
2 exclusive sensors
Skin TempOvernight changes linked to illness or cycle tracking
Irregular RhythmBackground optical check for irregular heart rhythms
Both
3 shared
Heart RateContinuous or on-demand pulse tracking
SpO2Blood oxygen saturation, tracked during sleep
HRVHeart rate variability — stress & recovery scores
Garmin Forerunner 265 only
3 exclusive sensors
Stress TrackingStress estimate from HRV and physiological signals
Body BatteryGarmin's energy reserve — how much fuel left in the tank
Training ReadinessDaily recovery score — how ready you are to perform

Why buy each?

Fitbit Air

$99 with no subscription

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.

24/7 health monitoring in 12 grams

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.

7-day battery with 5-minute fast charge

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.

Garmin Forerunner 265

Multi-band GPS accuracy

L1+L5 multi-band GPS reduces position drift in urban canyons and dense forest.

Training readiness score

Daily score combining HRV status, sleep, acute load, and recovery time.

Race time predictor

Estimates finish time for 5K, 10K, half-marathon, and marathon based on current fitness.

Quick Winner

The right pick depends on what you optimize for.

For the budget
Fitbit Air wins

$396 vs $659 over 3 years · no required subscription.

For battery life
Garmin Forerunner 265 wins

13 days vs 7 days battery.

For health depth
Garmin Forerunner 265 wins

6 sensors.

For daily comfort
Fitbit Air wins

12g · no required subscription.

Bottom Line

Technical gaps
  1. Air-only sensors: Skin Temp, Irregular Rhythm.
  2. Forerunner 265-only sensors: Stress Tracking, Body Battery, Training Readiness.
  3. Weight. Air is 35g lighter — relevant for all-day comfort and sleep.
Commercial gaps
  1. Hardware cost. Air is $350 cheaper upfront ($99 vs $449).
Pick the Fitbit Air if…

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 →
Pick the Garmin Forerunner 265 if…

Regular runners who race 5K to marathon distances and want accurate GPS and detailed training load management.

Full details →