Garmin Forerunner 255 vs Garmin Forerunner 955

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Forerunner 255 compared with Forerunner 955

	GarminForerunner 255	GarminForerunner 955
Overview
Released
Released	June 2022	June 2022
Display
Case sizes
Case sizes	46 mm	47 mm
Panel
Panel	Memory-in-pixel	Memory-in-pixel
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	1.3-inch (33 mm) transflective colour memory-in-pixel display, 260 x 260 pixels; button-operated.	1.3-inch (33 mm) transflective colour memory-in-pixel touchscreen, 260 x 260 pixels, with five buttons.
Screen protection
Screen protection	Corning Gorilla Glass 3.	Corning Gorilla Glass DX.
Health and fitness
ECG
ECG	No	No
Blood oxygen
Blood oxygen	Yes	Yes
Skin temperature
Skin temperature	No	No
Sleep apnoea alerts
Sleep apnoea alerts	No	No
High blood pressure alerts
High blood pressure alerts	No	No
Body composition
Body composition	No	No
Fall detection
Fall detection	No	No
Crash detection
Crash detection	No	No
GPS
GPS	Dual-band (L1 and L5)	Dual-band (L1 and L5)
Water resistance
Water resistance	50 m	50 m
Sensors
Sensors	GPS, GLONASS, Galileo, multi-frequency GNSS, Garmin Elevate wrist heart rate, Pulse Ox, barometric altimeter, compass, gyroscope and accelerometer.	GPS, GLONASS, Galileo, multi-frequency GNSS, Garmin Elevate wrist heart rate, Pulse Ox, barometric altimeter, compass, gyroscope, accelerometer and thermometer.
Health features
Health features	Pulse Ox, HRV status, sleep score, all-day stress and Body Battery energy monitoring.	Pulse Ox, HRV status, sleep score, all-day stress and Body Battery energy monitoring.
Fitness features
Fitness features	Triathlon and open-water swimming profiles, morning report, race widget, daily suggested workouts, training status and load, recovery time and PacePro; breadcrumb course guidance.	Training readiness and status, morning report, race widget, real-time stamina, PacePro, ClimbPro, triathlon profiles and full-colour maps with turn-by-turn route guidance.
Safety features
Safety features	Incident detection and assistance require a paired smartphone; LiveTrack.	Incident detection and assistance require a paired smartphone; LiveTrack.
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 14 days	Up to 15 days
Mobile data option
Mobile data option	No	No
Works with
Works with	iPhone and Android	iPhone and Android
Storage
Storage	–	32 GB
Battery life detail
Battery life detail	Up to 14 days in smartwatch mode, 30 hours in GPS-only mode or 16 hours with all-systems multi-band GNSS.	Up to 15 days in smartwatch mode, 42 hours in GPS-only mode without music or 20 hours with all-systems multi-band GNSS without music.
Charging
Charging	Rechargeable battery with Garmin charging cable.	Rechargeable battery with Garmin charging cable; this standard model has no solar charging lens.
Connectivity
Connectivity	Bluetooth and ANT+; Garmin Pay, Connect IQ, smart notifications and phone music controls. This standard model does not store music.	Bluetooth, ANT+ and Wi-Fi; Garmin Pay, Connect IQ, notifications and on-watch music storage for up to 2,000 songs.
Design
Weight (lightest version)
Weight (lightest version)	49 g (better)	52 g
Software
Software	Garmin	Garmin
Case materials
Case materials	Fibre-reinforced polymer bezel and silicone band; 5 ATM water rating.	Fibre-reinforced polymer bezel and silicone band; 5 ATM water rating.
Size
Size	45.6 x 45.6 x 12.9 mm; 49 g.	46.5 x 46.5 x 14.4 mm; 52 g.
Bands
Bands	Quick-release 22 mm band; fits wrists 130–205 mm.	QuickFit-compatible 22 mm band; fits wrists 130–220 mm.
Colours
Colours	Tidal blue with black bezel.	Black.