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Garmin Forerunner 255 vs Garmin Venu 3

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GarminForerunner 255GarminVenu 3
Overview
ReleasedJune 2022August 2023
Display
Case sizes46 mm45 mm
PanelMemory-in-pixelOLED
Always-on displayYesYes
Display detail1.3-inch (33 mm) transflective colour memory-in-pixel display, 260 x 260 pixels; button-operated.1.4-inch (35.4 mm) AMOLED touchscreen, 454 x 454 pixels, with optional always-on mode and two font sizes.
Screen protectionCorning Gorilla Glass 3.Corning Gorilla Glass 3.
Health and fitness
ECGNoYes
Blood oxygenYesYes
Skin temperatureNoYes
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSDual-band (L1 and L5)Single-band
Water resistance50 m50 m
SensorsGPS, GLONASS, Galileo, multi-frequency GNSS, Garmin Elevate wrist heart rate, Pulse Ox, barometric altimeter, compass, gyroscope and accelerometer.GPS, GLONASS, Galileo, Garmin Elevate wrist heart rate, Pulse Ox, barometric altimeter, compass, gyroscope, accelerometer and ambient light sensor; tempe accessory needed for ambient temperature.
Health featuresPulse Ox, HRV status, sleep score, all-day stress and Body Battery energy monitoring.Heart rate, Pulse Ox, HRV status, sleep coach, nap detection, stress, Body Battery and overnight skin-temperature trends. Garmin ECG app requires supported region and current software.
Fitness featuresTriathlon and open-water swimming profiles, morning report, race widget, daily suggested workouts, training status and load, recovery time and PacePro; breadcrumb course guidance.More than 30 sports apps, Garmin Coach, animated workouts, workout benefit and recovery time; wheelchair mode tracks pushes and offers weight-shift alerts and specific workouts.
Safety featuresIncident detection and assistance require a paired smartphone; LiveTrack.Incident detection, assistance and LiveTrack require a paired phone; incident detection is unavailable in wheelchair mode.
Battery and connections
Battery life (maker's claim)Up to 14 daysUp to 14 days
In low-power mode–Up to 26 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Storage–8 GB
Battery life detailUp to 14 days in smartwatch mode, 30 hours in GPS-only mode or 16 hours with all-systems multi-band GNSS.Up to 14 days in smartwatch mode, five days with always-on display, 26 days in battery saver, 26 hours GPS-only, 20 hours all-systems GNSS or 11 hours all-systems GNSS with music.
ChargingRechargeable battery with Garmin charging cable.Garmin proprietary charging cable.
ConnectivityBluetooth and ANT+; Garmin Pay, Connect IQ, smart notifications and phone music controls. This standard model does not store music.Bluetooth, ANT+ and Wi-Fi; paired-phone calls and voice assistant through built-in speaker and microphone, Garmin Pay, Connect IQ, smart notifications and stored music.
Storage–8 GB of memory/history.
Design
Weight (lightest version)49 g47 g
SoftwareGarminGarmin
Case materialsFibre-reinforced polymer bezel and silicone band; 5 ATM water rating.Stainless-steel bezel, fibre-reinforced polymer case and silicone band; 5 ATM water rating.
Size45.6 x 45.6 x 12.9 mm; 49 g.45 x 45 x 12 mm; 30 g without band or 47 g with the included band.
BandsQuick-release 22 mm band; fits wrists 130–205 mm.Quick-release 22 mm band; fits wrists 135–200 mm.
ColoursTidal blue with black bezel.Black case and band with slate stainless-steel bezel.

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