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Garmin Forerunner 235 vs Garmin Forerunner 570

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

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GarminForerunner 235GarminForerunner 570
Overview
ReleasedNovember 2015May 2025
Display
Case sizes45 mm42 mm or 47 mm
PanelMemory-in-pixelOLED
Always-on displayYesYes
Display detail1.23-inch (31.1 mm) sunlight-readable colour display, 215 x 180 pixels, with button controls.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–Corning Gorilla Glass 3
Health and fitness
ECGNoNo
Blood oxygenNoYes
Skin temperatureNoYes
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandDual-band (L1 and L5)
Water resistance50 m50 m
SensorsGPS, GLONASS, Garmin Elevate optical wrist heart rate and accelerometer.Garmin Elevate wrist heart rate monitor; Pulse Ox blood oxygen monitor; barometric altimeter; compass; gyroscope; accelerometer; thermometer; ambient light sensor
Health featuresAll-day wrist heart rate, steps, calories and sleep tracking.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 featuresRunning and cycling tracking, VO2 max estimate, race predictor, recovery advisor, indoor distance from the accelerometer and optional foot-pod and cycling speed/cadence sensors.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–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)Up to 9 daysUp to 11 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Storage–8 GB
Battery life detailUp to nine days as a watch with activity tracking, notifications and heart rate; up to 11 hours in training mode.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
ChargingRechargeable lithium-ion battery.Garmin charging cable with proprietary plug
ConnectivityBluetooth and ANT+; smart notifications, Connect IQ, phone music controls and Garmin Connect Mobile sync. No on-watch music storage.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
Design
Weight (lightest version)42 g42 g
SoftwareGarminGarmin
Case materials5 ATM water rating.Aluminium bezel; silicone band; 5 ATM water rating
Size45 x 45 x 11.7 mm; 42 g.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–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
In the box–Forerunner 570, charging cable, documentation
ColoursBlack and red.–

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