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

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

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Garminfēnix 5Garminfēnix 8 AMOLED (47 mm, Sapphire)
Overview
ReleasedMarch 2017August 2024
Display
Case sizes47 mm47 mm
PanelMemory-in-pixelOLED
Always-on displayYesYes
Display detail1.2-inch (30.5 mm) always-on transflective colour display, 240 x 240 pixels, with 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 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 featuresWrist heart rate, steps, sleep and stress tracking.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, training effect, VO2 max, recovery advisor and course/track navigation. Running dynamics require a compatible heart-rate 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 features–Incident detection and assistance require a paired smartphone.
Battery and connections
Battery life (maker's claim)Up to 14 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 14 days in smartwatch mode, 21 hours in GPS mode or 44 hours in UltraTrac with wrist heart rate on, according to the Singapore product specification.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.Rechargeable lithium-ion battery with Garmin proprietary plug charger.
ConnectivityANT+ and Bluetooth smartphone pairing; smart notifications, Garmin Connect and Connect IQ; phone music controls.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.
Design
Weight (lightest version)85 g73 g
SoftwareGarminGarmin
Case materialsStainless steel bezel, buttons and rear case with silicone band; 10 ATM water rating.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.
Size47 x 47 x 15.5 mm; 85 g with silicone band.47 x 47 x 13.8 mm; 73 g with silicone band, 52 g case only.
BandsQuickFit interchangeable band.QuickFit 22 mm band; silicone band fits wrists 125–208 mm.
ColoursGrey case with black silicone band.Titanium with spark orange and graphite silicone band.

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