Fitbit Charge 6 vs Fitbit Inspire 3

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

Charge 6 compared with Inspire 3
FitbitCharge 6FitbitInspire 3
Overview
ReleasedOctober 2023September 2022
Display
Case sizes36.73 mm39.32 mm
PanelOLEDOLED
Always-on displayYesYes
Display detailcolour AMOLED touchscreen; always-on optionColour AMOLED touchscreen; always-on option
Screen protectionCorning Gorilla Glass 3Corning Gorilla Glass 3
Health and fitness
ECGYesNo
Blood oxygenYesYes
Skin temperatureYesYes
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandNone
Water resistance50 m50 m
SensorsOptical heart-rate sensor; electrical sensors for ECG; red and infrared SpO2 sensors; accelerometer; ambient light sensor; device temperature sensor for skin temperature variation; vibration motorOptical heart-rate sensor; 3-axis accelerometer; red and infrared SpO2 sensors; ambient light sensor; device temperature sensor for skin temperature variation; vibration motor
Health featuresECG app and irregular heart rhythm notifications in supported regions; sleep tracking, SpO2, skin temperature variation, stress management and heart-rate alerts. Availability varies by country.Sleep stages and Sleep Score, stress management, heart-rate alerts, SpO2 and skin temperature variation. Some detailed insights and features require Fitbit Premium; availability varies by country.
Fitness featuresBuilt-in GPS and GLONASS; 40+ exercise modes; Active Zone Minutes; automatic exercise recognition; Google Maps directions and Google Wallet; YouTube Music controls require a compatible subscription.Activity tracking, Active Zone Minutes, more than 20 exercise modes and connected GPS using a paired phone; no built-in GPS.
Battery and connections
Battery life (maker's claim)Up to 7 daysUp to 10 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Battery life detailUp to 7 days; use of the always-on display and SpO2 features requires more frequent charging. A full 0–100% charge takes up to 2 hours.Up to 10 days; a full 0–100% charge takes up to 2 hours. Battery life varies with use and settings.
ChargingIncluded charging cable; full 0–100% charge in about 2 hours.Included charging cable; full 0–100% charge in about 2 hours.
ConnectivityBluetooth; built-in GPS and GLONASS; NFC for Google Wallet. Compatible with Android 11 or newer and iOS 16.4 or newer through the Google Health app.Bluetooth and connected GPS using a paired phone; compatible with Android 11 or newer and iOS 16.4 or newer using the Google Health app.
StorageSaves 7 days of detailed motion data minute by minute and daily totals for 30 days; heart-rate data at 1-second intervals during exercise and 5-second intervals at other times.Saves 7 days of detailed motion data minute by minute and daily totals for 30 days; heart-rate data at 1-second intervals during exercise and 5-second intervals at other times.
Design
Weight (lightest version)30 g17.69 g (better)
SoftwareOtherOther
Case materialsAluminium case; flexible lightweight silicone band; Corning Gorilla Glass 3 display cover; water resistant to 5 ATM.Silicone band with plastic buckle and tang; Corning Gorilla Glass 3 display cover; water resistant to 5 ATM.
Size36.73 × 23.09 × 11.2 mm; 30 g including band.39.32 × 18.6 × 11.75 mm; 17.69 g including band.
BandsSmall and large silicone bands included; small fits 130–170 mm wrists and large fits 170–210 mm.Small and large silicone bands included; small fits 130–190 mm wrists and large fits 160–220 mm.
ColoursCoral/Champagne Gold; Porcelain/Silver; Obsidian/Black.Midnight Zen; Lilac Bliss; Morning Glow.
In the boxFitbit Charge 6 tracker; small and large bands; charging cableFitbit Inspire 3; small and large classic wristbands; charging cable.

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