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Garmin fēnix 5S vs Garmin fēnix 8 AMOLED (47 mm, Sapphire)

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

Better figure, where one is clearly better

Garminfēnix 5SGarminfēnix 8 AMOLED (47 mm, Sapphire)
Overview
ReleasedMarch 2017August 2024
Display
Case sizes42 mm47 mm
Panel–OLED
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.1.4-inch (35.56 mm) AMOLED touchscreen, 454 x 454 pixels, with optional always-on mode and leakproof inductive buttons.
Screen protection–Sapphire crystal lens on this titanium edition.
Health and fitness
ECGNoYes
Blood oxygenNoYes
Skin temperatureNoYes
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandDual-band (L1 and L5)
Water resistance100 m100 m
SensorsGPS, GLONASS, Garmin Elevate optical wrist heart rate, barometric altimeter, three-axis compass, gyroscope, accelerometer and thermometer.GPS, GLONASS, Galileo, QZSS and BeiDou with SatIQ multi-band positioning; Garmin Elevate wrist heart rate, Pulse Ox, barometric altimeter, compass, gyroscope, accelerometer, thermometer, ambient light and depth sensors.
Health features–Pulse Ox, skin temperature, sleep and HRV tracking; ECG app where regionally available, subject to compatible phone app and watch software.
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.Sport-specific strength workouts, training readiness, endurance and hill scores, PacePro, ClimbPro, TopoActive maps, scuba and apnea dive activities; built-in LED flashlight.
Safety featuresCourse navigation, breadcrumb trails, TracBack and waypoint guidance; no preloaded detailed maps. Connected LiveTrack and GroupTrack require a paired phone.Incident detection and assistance require a paired smartphone.
Battery and connections
Battery life (maker's claim)Up to 9 daysUp to 16 days
In low-power mode–Up to 23 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Storage–32 GB
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 16 days in smartwatch mode, seven days with always-on display, 47 hours in GPS-only mode or 35 hours with all-systems multi-band GNSS.
ChargingRechargeable lithium-ion battery with USB charging/data cable.Rechargeable lithium-ion battery with Garmin proprietary plug charger.
ConnectivityBluetooth and ANT+, smartphone notifications, Garmin Connect uploads, Connect IQ apps and phone music controls. Wi-Fi is included in Sapphire editions.Bluetooth, ANT+ and Wi-Fi; Garmin Pay, Connect IQ and on-watch music. Speaker and microphone support calls and voice messaging through a paired phone; some offline voice commands work without one.
Storage64 MB total, with 37 MB available; up to 1,000 waypoints, thirty routes and 200 hours of activity data.–
Design
Weight (lightest version)67 g73 g
SoftwareGarminGarmin
Case materialsStainless-steel bezel, buttons and rear case; 10 ATM water rating. Sapphire-glass editions available.Titanium bezel, fibre-reinforced polymer case with metal rear cover, sapphire crystal and silicone band; 10 ATM water rating and 40 m dive-rated case.
Size42 × 42 × 14.5 mm; 67 g with silicone band.47 x 47 x 13.8 mm; 73 g with silicone band, 52 g case only.
BandsQuickFit interchangeable bands.QuickFit 22 mm band; silicone band fits wrists 125–208 mm.
ColoursWhite model pictured; other case and band colours and Sapphire editions available.Titanium with spark orange and graphite silicone band.

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