Garmin Forerunner 15 vs Garmin Forerunner 570

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Forerunner 15 compared with Forerunner 570

	GarminForerunner 15	GarminForerunner 570
Overview
Released
Released	2014	May 2025
Display
Case sizes
Case sizes	52 mm or 57 mm	42 mm or 47 mm
Panel
Panel	Memory-in-pixel	OLED
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	Monochrome memory-in-pixel display, 55 × 32 pixels; 2.1 × 2.0 cm on the small version and 2.5 × 2.4 cm on the large version, with a backlight and four-button control.	42 mm model has a 1.2″ (30.4 mm) AMOLED touchscreen, 390 x 390 pixels; 47 mm has a 1.4″ (35.3 mm) AMOLED touchscreen, 454 x 454 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	Yes
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; supports a chest-worn heart-rate monitor and optional ANT+ foot pod for indoor pace and distance.	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, calories and inactivity reminders; heart-rate recording requires the chest strap sold in some bundles.	Skin temperature; high and low heart rate alerts; HRV status; Body Battery; all-day stress; sleep score, sleep coach, sleep alignment and nap detection; breathing variations; Health Snapshot; women's health tracking with past ovulation estimates; jet lag adviser
Fitness features
Fitness features	Outdoor pace, distance, personal records, Auto Lap, Auto Pause, Virtual Pacer and run/walk intervals; indoor distance requires the foot pod.	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 and projected race time; Garmin Coach and Garmin Triathlon Coach plans; daily suggested workouts; multisport workouts; heat and altitude acclimation; course navigation, TracBack and Up Ahead; triathlon and open-water swimming
Safety features
Safety features	–	Incident detection during select activities; assistance; LiveTrack; 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 35 days	Up to 11 days
Mobile data option
Mobile data option	No	No
Works with
Works with	No phone pairing	iPhone and Android
Storage
Storage	–	8 GB
Battery life detail
Battery life detail	Up to five weeks in watch/activity-tracking mode or eight hours with GPS on.	Smartwatch mode up to 10 days (42 mm) or 11 days (47 mm); GPS only up to 18 hours for either size; SatIQ (AutoSelect) up to 14 or 16 hours; All-Systems + Multi-Band up to 13 or 14 hours; with music, GPS only up to nine hours and the other two modes up to eight hours for either size
Charging
Charging	Rechargeable lithium-ion battery with a USB charging and data cable.	Garmin charging cable with proprietary plug
Connectivity
Connectivity	USB connection to a Mac or PC for Garmin Connect uploads; no Bluetooth or direct smartphone sync. 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; music storage; speaker and microphone for calls and the phone's voice assistant with a paired phone; voice commands; Garmin Share; Connect IQ
Storage
Storage	Seven activities of on-watch history.	–
Design
Weight (lightest version)
Weight (lightest version)	36 g (better)	42 g
Software
Software	Garmin	Garmin
Case materials
Case materials	Plastic case and band; 5 ATM water rating.	Aluminium bezel; silicone band; 5 ATM water rating
Size
Size	Small 4.0 × 5.2 × 1.6 cm and 36 g; large 4.6 × 5.7 × 1.6 cm and 43 g. The longest case dimensions appear in the size comparison.	42 mm model is 42.4 x 42.4 x 12.9 mm and 42 g; 47 mm model is 47 x 47 x 12.9 mm and 50 g; Garmin does not publish case-only weights
Bands
Bands	–	Quick-release 20 mm bands for the 42 mm model, fitting 115–178 mm wrists; quick-release 22 mm bands for the 47 mm model, fitting 135–205 mm wrists
Colours
Colours	Small black/green, teal/white and violet/white; large black/blue and red/black.	–
In the box
In the box	Watch, charging/data cable and manual; a chest heart-rate monitor was included in some bundles.	Forerunner 570, charging cable, documentation