Garmin fēnix 3 HR vs Garmin fēnix 5X

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

Better figure, where one is clearly better

fēnix 3 HR compared with fēnix 5X
Garminfēnix 3 HRGarminfēnix 5X
Overview
Released2016March 2017
Display
Case sizes51.5 mm51 mm
PanelMemory-in-pixel–
Always-on displayYesYes
Display detail1.2-inch (30.4 mm) transflective colour MIP display, 218 x 218 pixels, with button controls.Always-on transflective colour Garmin Chroma display, 1.2 inches (30.5 mm), 240 × 240 pixels, with LED backlight and physical buttons.
Screen protectionDomed sapphire lens.–
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 m100 m
SensorsGPS, GLONASS, Garmin Elevate optical wrist heart rate, barometric altimeter, three-axis compass and accelerometer.GPS, GLONASS, Garmin Elevate optical wrist heart rate, barometric altimeter, three-axis compass, gyroscope, accelerometer and thermometer.
Health featuresAll-day heart rate, steps and sleep tracking; intensity minutes.–
Fitness featuresRunning, cycling, swimming, triathlon, hiking, skiing, golf and rowing profiles; breadcrumb courses and TracBack; VO2 max estimate, recovery advisor and race predictor. Stride length, ground-contact balance and vertical ratio require a compatible chest strap.Running, cycling, pool and open-water swimming, skiing, golf and paddle-sport profiles; training status, aerobic and anaerobic training effect, VO2 max estimates and recovery advice. Additional running dynamics require a compatible chest strap.
Safety features–Preloaded colour topographic and cycling maps, golf courses, round-trip route generation, turn-by-turn guidance and nearby points of interest. European editions have preloaded European topographic maps; map regions vary by market. TracBack and connected LiveTrack/GroupTrack also supported.
Battery and connections
Battery life (maker's claim)Up to 14 daysUp to 12 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Battery life detailUp to two weeks in smartwatch mode with 24/7 heart rate, 16 hours in GPS training mode or 40 hours in UltraTrac mode. Garmin's launch release also stated up to three weeks in watch mode without the same smartwatch use.Up to twelve days in smartwatch mode, twenty hours in GPS mode or thirty hours in UltraTrac with wrist heart rate on, according to the Singapore specification; the European launch release quotes thirty-five hours UltraTrac.
ChargingRechargeable 300 mAh lithium-ion battery with USB charging cable.Rechargeable lithium-ion battery with USB charging/data cable.
ConnectivityBluetooth, ANT+ and Wi-Fi; smart notifications, Connect IQ, Garmin Connect and LiveTrack through a paired phone.Wi-Fi, Bluetooth and ANT+; smartphone notifications, Garmin Connect uploads, Connect IQ apps and phone music controls.
Storage32 MB built-in memory, with 23 MB available; up to 1,000 waypoints and 30 routes.Singapore specification lists 12 GB total and 8 GB available; 1,000 waypoints, fifty routes, 10,000 track points and 100 saved tracks.
Design
Weight (lightest version)86.1 g (better)98 g
SoftwareGarminGarmin
Case materialsPVD stainless steel bezel and buttons, reinforced housing and treated silicone band; 10 ATM water rating.Sapphire-glass lens, stainless-steel bezel, buttons and rear case; 10 ATM water rating.
Size51.5 x 51.5 x 16 mm; 86.1 g with silicone band.51 × 51 × 17.5 mm; 98 g with silicone band.
Bands–QuickFit interchangeable bands.
ColoursDark grey case with black silicone band.Slate-grey model with black silicone band pictured.

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