Garmin Forerunner 70 vs Polar Street X

Garmin Forerunner 70

Garmin Forerunner 70

vsPolar Street X

Polar Street X

Garmin Forerunner 70Polar Street X
Display1.2-inch (30.4 mm) AMOLED touchscreen, 390x390, optional always-on mode, five-button design, chemically strengthened glass1.28-inch AMOLED touchscreen, 416 x 416, always-on option, Gorilla Glass 3
BodyFiber-reinforced polymer bezel, silicone strap; 42.6 x 42.6 x 11.9 mm; 40 g; 20 mm quick-release bands; fits wrists 126-203 mm45 x 45 x 13.8 mm; 48 g with wristband, 28 g without; bio-based plastic case; 22 mm quick-release strap
BatteryUp to 13 days in smartwatch mode (up to 5 days with always-on display), up to 28 days in battery saver mode, up to 23 hours in GPS-only mode, up to 16 hours in all-systems GNSS modeUp to 10 days in smartwatch mode; up to 43 hours with GPS in performance training mode (170 hours in eco mode); 385 mAh, replaceable
Memory512 MB—
PositioningGPS, GLONASS and GalileoGPS, Galileo, BeiDou, QZSS with assisted GPS; barometer, compass; route guidance and back to start
SensorsGarmin Elevate wrist heart rate monitor, Pulse Ox blood oxygen (not available in all countries)Precision Prime optical heart rate, nightly skin temperature, accelerometer, gyroscope, barometer, magnetometer; no ECG or SpO2
ConnectivityBluetooth, ANT+; smart notifications and LiveTrack with a paired smartphoneBluetooth LE; proprietary USB-C charging cable
Durability5 ATM water resistanceWR50 water resistance; tested to MIL-STD-810H; -20 to 50 °C operation
TrainingQuick workouts, Garmin Coach adaptive plans including run/walk, daily suggested workouts, training readiness, training status, wrist-based running power, running dynamics—
Sports80+ built-in sports apps including running, swimming, cycling and strength training170+ sports and activities, Training Load Pro, Nightly Recharge, SleepWise, Sleep Plus Stages
HealthAdvanced sleep tracking, sleep coach, breathing variations, HRV status, lifestyle logging, Health Status—
CompatibilityGarmin Connect app for iPhone and Android; Connect IQ watch faces and data fields—
ColorsCitron, soft pink, tidal blue, cool lavender, black, whitestoneNight Black, Snow White, Forest Green
Performance—275 MHz CPU, 5 MB memory, 32 MB storage
Extras—Integrated LED flashlight with white and red light; Polar Flow app and web service included