Wear Radar

Fitbit ChargevsGarmin Forerunner 165

11d vs 7d
battery life
Garmin Forerunner 165 lasts longer
$129
price gap
Fitbit Charge cheaper
24g
lighter
Fitbit Charge
Fitbit Charge
Buy/Wait:bad

Late in cycle — a new model is likely coming

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Garmin Forerunner 165
Buy/Wait:bad

Late in cycle — a new model is likely coming

Full details →
Fitbit ChargeGarmin Forerunner 165
Pricing
Starting price$120$249
Subscriptionℹ️ Optional — $79/yrℹ️ Optional — $70/yr
Hardware
Weight15g39g
Water resistance50m5ATM
Battery7 days11 days
Always-on display
GPS
Cellular
PlatformiOS & AndroidiOS & Android
TierFitness TrackerSports GPS
Buy timing
ReleasedSep 28, 2023Mar 5, 2024
Cycle advicebadbad
Deals advicegreatgood
Next modelFitbit Charge 7 (Expected 2026)Garmin Forerunner 170 (Expected March 2026)

Health Sensors

Fitbit Charge only
3 exclusive sensors
ECGDetects irregular heart rhythms (AFib)
EDA / StressSkin conductance sensor measuring stress responses
Skin TempOvernight changes linked to illness or cycle tracking
Both
3 shared
SpO2Blood oxygen saturation, tracked during sleep
Heart RateContinuous or on-demand pulse tracking
HRVHeart rate variability — stress & recovery scores
Garmin Forerunner 165 only
2 exclusive sensors
Stress TrackingStress estimate from HRV and physiological signals
Body BatteryGarmin's energy reserve — how much fuel left in the tank

Why buy each?

Fitbit Charge

ECG and EDA stress in a slim band

Full ECG, electrodermal activity stress sensing, SpO2, and continuous heart rate in a tracker thinner than most smartwatches.

Google apps integration

Google Maps navigation, Google Wallet NFC payments, and YouTube Music controls — more useful on-device apps than any previous Charge.

7-day battery with GPS

7 days of typical use, dropping to around 30 minutes per GPS workout session before needing a charge.

Garmin Forerunner 165

AMOLED display at entry-level price

The FR165 is the first Garmin entry-level running watch with an AMOLED display — dramatically more readable than the LCD it replaces.

Full Garmin running analytics

Training load, recovery time, Body Battery, HRV status, VO2 max estimation — the same analytics found on watches costing twice as much.

11 days of battery

11 days typical use and roughly 19 hours GPS — enough for most training blocks without mid-week charging.

Quick Winner

The right pick depends on what you optimize for.

For the budget
Fitbit Charge wins

$357 vs $459 over 3 years · no required subscription.

For battery life
Garmin Forerunner 165 wins

11 days vs 7 days battery.

For health depth
Fitbit Charge wins

6 sensors.

For daily comfort
Fitbit Charge wins

15g · no required subscription.

Bottom Line

Technical gaps
  1. Charge-only sensors: ECG, EDA / Stress, Skin Temp.
  2. Forerunner 165-only sensors: Stress Tracking, Body Battery.
  3. Weight. Charge is 24g lighter — relevant for all-day comfort and sleep.
Commercial gaps
  1. Hardware cost. Charge is $129 cheaper upfront ($120 vs $249).
Pick the Fitbit Charge if…

Anyone who wants serious health and fitness tracking without the bulk or cost of a full smartwatch. Works with both Android and iPhone, making it the most accessible Fitbit tracker in the lineup.

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Pick the Garmin Forerunner 165 if…

Beginner and intermediate runners who want real GPS accuracy and Garmin's analytics depth without the price of the 265 or 965. Also ideal as a first serious GPS watch for anyone moving up from a fitness tracker.

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