Garmin Forerunner 25 vs Garmin Forerunner 265

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Forerunner 25 compared with Forerunner 265

	GarminForerunner 25	GarminForerunner 265
Overview
Released
Released	2015	March 2023
Display
Case sizes
Case sizes	43.9 mm or 47 mm	42 mm or 46 mm
Panel
Panel	Memory-in-pixel	OLED
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	Monochrome transflective memory-in-pixel display, 128 × 128 pixels; 18.5 × 18.5 mm in the small version and 23 × 23 mm in the large version.	Forerunner 265S has a 1.1″ (28.1 mm) AMOLED touchscreen, 360 x 360 pixels; Forerunner 265 has a 1.3″ (32.5 mm) AMOLED touchscreen, 416 x 416 pixels; five buttons; optional always-on mode
Screen protection
Screen protection	–	Corning Gorilla Glass 3
Health and fitness
ECG
ECG	No	No
Blood oxygen
Blood oxygen	No	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	Single-band	Dual-band (L1 and L5)
Water resistance
Water resistance	50 m	50 m
Sensors
Sensors	Built-in GPS and accelerometer; heart rate requires an optional ANT+ chest strap, and an optional foot pod is supported.	Garmin Elevate wrist heart rate monitor; Pulse Ox blood oxygen monitor; barometric altimeter; compass; gyroscope; accelerometer; thermometer; ambient light sensor
Health features
Health features	Daily steps, automatic step goal, inactivity bar and sleep monitoring; heart-rate zones require a paired chest strap.	High and low heart rate alerts; HRV status; Body Battery; all-day stress; sleep score, sleep coach and nap detection; breathing variations; respiration rate; Health Snapshot; menstrual cycle and pregnancy tracking; jet lag adviser
Fitness features
Fitness features	Running pace, distance, personal records, Virtual Pacer, Auto Pause, Auto Lap and time, distance and run/walk alerts; indoor distance from its accelerometer.	Training readiness and training status; training load, load ratio and load focus; training effect, VO2 max and recovery time; wrist-based running power and dynamics; PacePro; race predictor; Garmin Coach running, cycling and strength plans; daily suggested running and cycling workouts; triathlon and open-water swimming; course navigation with a breadcrumb trail, TracBack and Up Ahead
Safety features
Safety features	Live Tracking shares a run through a paired compatible smartphone.	Incident detection during select activities; assistance; LiveTrack; spectator messaging; live event sharing (Android only); these features require a paired phone
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 70 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	–	8 GB
Battery life detail
Battery life detail	Small version up to eight weeks in watch mode or eight hours of GPS training; large version up to ten weeks or ten hours respectively.	Forerunner 265S up to 15 days in smartwatch mode, 24 hours GPS only, 18 hours SatIQ (AutoSelect), 15 hours All-Systems + Multi-Band; with music up to 7.5, seven and six hours respectively. Forerunner 265 up to 13 days in smartwatch mode, 20 hours GPS only, 16 hours SatIQ, 14 hours All-Systems + Multi-Band; with music up to seven, 6.5 and six hours respectively
Charging
Charging	Rechargeable lithium-ion battery; charging and data cable supplied.	Garmin proprietary plug charger; USB-C charging/data cable included
Connectivity
Connectivity	Bluetooth Low Energy syncs to Garmin Connect Mobile and displays paired-phone notifications; ANT+ supports optional heart-rate and foot-pod accessories.	Bluetooth, ANT+ and Wi-Fi; multi-band GPS with GPS, GLONASS, Galileo, QZSS, BeiDou and SatIQ; Garmin Pay; offline music from Spotify, Deezer and Amazon Music (premium subscription required); Connect IQ; notifications and Android text responses; Garmin Share
Storage
Storage	Seven activities of on-watch history.	–
Design
Weight (lightest version)
Weight (lightest version)	31 g (better)	39 g
Software
Software	Garmin	Garmin
Case materials
Case materials	Silicone band and 5 ATM water rating.	Fibre-reinforced polymer bezel; silicone band; 5 ATM water rating
Size
Size	Small version 35.9 × 43.9 × 13.9 mm, 31 g; large version 40.2 × 47 × 13.9 mm, 39 g. Longest case dimensions appear in the size comparison.	Forerunner 265S is 41.7 x 41.7 x 12.9 mm and 39 g; Forerunner 265 is 46.1 x 46.1 x 12.9 mm and 47 g; Garmin does not publish case-only weights
Bands
Bands	–	Quick-release 18 mm bands for the 265S, fitting 115–178 mm wrists; quick-release 22 mm bands for the 265, fitting 135–205 mm wrists
Colours
Colours	Large versions in black/blue and black/red; small versions in black/violet and white/pink.	–
In the box
In the box	Watch, charging/data cable and manual; some bundles also included a heart-rate chest strap.	Forerunner 265 or 265S, USB-C charging/data cable, documentation