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Garmin fēnix 5S vs Garmin Forerunner 35

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

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Garminfēnix 5SGarminForerunner 35
Overview
ReleasedMarch 20172016
Display
Case sizes42 mm40.7 mm
Panel–Memory-in-pixel
Always-on displayYesYes
Display detailAlways-on transflective colour Garmin Chroma display, 1.1 inches (27.94 mm), 218 × 218 pixels, with LED backlight and button controls.0.93 × 0.93-inch (23.5 × 23.5 mm) monochrome, transflective memory-in-pixel display, 128 × 128 pixels; button controls and a backlight.
Screen protection–Chemically strengthened glass.
Health and fitness
ECGNoNo
Blood oxygenNoNo
Skin temperatureNoNo
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandSingle-band
Water resistance100 m50 m
SensorsGPS, GLONASS, Garmin Elevate optical wrist heart rate, barometric altimeter, three-axis compass, gyroscope, accelerometer and thermometer.Built-in GPS, Garmin Elevate optical heart-rate sensor and accelerometer; supports ANT+ heart-rate and cycling sensors.
Health features–Continuous heart rate, steps, calories, distance, sleep and intensity-minute tracking, with inactivity alerts and Move IQ activity recognition.
Fitness featuresRunning, cycling, pool and open-water swimming, skiing, golf and paddle-sport profiles; training status, aerobic and anaerobic training effect, VO2 max estimates, recovery advice and race prediction. Additional running dynamics require a compatible chest strap.Outdoor and indoor running, walking, cycling and cardio profiles; virtual pacing, intervals, personal records and vibration alerts. No swim-tracking profile.
Safety featuresCourse navigation, breadcrumb trails, TracBack and waypoint guidance; no preloaded detailed maps. Connected LiveTrack and GroupTrack require a paired phone.LiveTrack shares a run's location when paired with a compatible smartphone.
Battery and connections
Battery life (maker's claim)Up to 9 daysUp to 9 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Battery life detailUp to nine days in smartwatch mode, twelve hours in GPS mode or twenty-eight hours in UltraTrac with wrist heart rate on, according to the Singapore specification; the European launch release quotes fourteen hours GPS and thirty-five hours UltraTrac.Up to nine days with notifications, activity tracking and wrist heart rate, or 13 hours in GPS training mode.
ChargingRechargeable lithium-ion battery with USB charging/data cable.Rechargeable lithium-ion battery with a USB charging clip.
ConnectivityBluetooth and ANT+, smartphone notifications, Garmin Connect uploads, Connect IQ apps and phone music controls. Wi-Fi is included in Sapphire editions.Bluetooth and ANT+; paired-phone notifications, music controls, automatic Garmin Connect uploads and Find My Phone. No Connect IQ app support or music storage.
Storage64 MB total, with 37 MB available; up to 1,000 waypoints, thirty routes and 200 hours of activity data.Seven activities of on-watch history.
Design
Weight (lightest version)67 g37.3 g
SoftwareGarminGarmin
Case materialsStainless-steel bezel, buttons and rear case; 10 ATM water rating. Sapphire-glass editions available.Silicone strap and 5 ATM water rating.
Size42 × 42 × 14.5 mm; 67 g with silicone band.35.5 × 40.7 × 13.3 mm; 37.3 g. The longest case dimension is used in the size comparison.
BandsQuickFit interchangeable bands.Fits wrists 140–200 mm.
ColoursWhite model pictured; other case and band colours and Sapphire editions available.Black case and band; Garmin also sold limelight, frost blue and white versions.

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