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Garmin fēnix 2 vs Garmin Forerunner 15

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

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Garminfēnix 2GarminForerunner 15
Overview
ReleasedMarch 20142014
Display
Case sizes49 mm52 mm or 57 mm
PanelLCDMemory-in-pixel
Always-on displayYesYes
Display detailTransflective monochrome LCD, 31 mm diameter and 70 × 70 pixels; negative display with red LED backlight and physical buttons.Monochrome memory-in-pixel display, 55 × 32 pixels; 2.1 × 2.0 cm on the small version and 2.5 × 2.4 cm on the large version, with a backlight and four-button control.
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 resistance50 m50 m
SensorsHigh-sensitivity GPS receiver, barometric altimeter, three-axis compass and accelerometer. Optional ANT+ heart-rate, HRM-Run, foot-pod, speed/cadence, power and tempe temperature sensors; no optical wrist heart-rate sensor.Built-in GPS; supports a chest-worn heart-rate monitor and optional ANT+ foot pod for indoor pace and distance.
Health features–Daily steps, calories and inactivity reminders; heart-rate recording requires the chest strap sold in some bundles.
Fitness featuresRunning, cycling, pool and open-water swimming, multisport, hiking and skiing profiles; advanced workouts, Virtual Partner, Training Effect, VO2 max estimates, race prediction and recovery advice. Running dynamics require an HRM-Run chest strap; indoor pace and distance use the accelerometer.Outdoor pace, distance, personal records, Auto Lap, Auto Pause, Virtual Pacer and run/walk intervals; indoor distance requires the foot pod.
Safety featuresBreadcrumb routes, waypoint navigation and TracBack to retrace the recorded route; no preloaded base maps.–
Battery and connections
Battery life (maker's claim)Up to 35 daysUp to 35 days
Mobile data optionNoNo
Works withiPhone and AndroidNo phone pairing
Battery life detailRechargeable 500 mAh lithium-ion battery; up to five weeks in watch mode, sixteen hours with normal GPS recording or fifty hours in UltraTrac with one-minute GPS polling, according to the owner's manual.Up to five weeks in watch/activity-tracking mode or eight hours with GPS on.
ChargingUSB contact charging/data cradle and AC adapter.Rechargeable lithium-ion battery with a USB charging and data cable.
ConnectivityBluetooth Smart phone notifications, Garmin Connect uploads and LiveTrack; USB computer transfer and ANT+ sensor connections. Garmin's 2015 catalogue confirms iPhone 4S or later and most Bluetooth Smart Android devices running Android 4.3 or later. The manual says ANT+ sensors cannot connect while Bluetooth is enabled.USB connection to a Mac or PC for Garmin Connect uploads; no Bluetooth or direct smartphone sync. ANT+ supports optional heart-rate and foot-pod accessories.
Storage20 MB internal memory; up to 1,000 waypoints, fifty routes, 10,000 track points and 100 saved tracks.Seven activities of on-watch history.
Design
Weight (lightest version)90.6 g36 g
SoftwareGarminGarmin
Case materialsCurved mineral-glass lens, shock-resistant housing and polyurethane wristband; 5 ATM water rating.Plastic case and band; 5 ATM water rating.
Size49 × 49 × 17 mm; 90.6 g.Small 4.0 × 5.2 × 1.6 cm and 36 g; large 4.6 × 5.7 × 1.6 cm and 43 g. The longest case dimensions appear in the size comparison.
Colours–Small black/green, teal/white and violet/white; large black/blue and red/black.
BandsPolyurethane wristband; additional hook-and-loop fabric strap accommodates larger wrists or wearing over a jacket.–
In the boxWatch, fabric wrist-strap kit, USB charging/data cable, AC adapter and quick-start manual; HRM-Run chest strap included in the Performer Bundle.Watch, charging/data cable and manual; a chest heart-rate monitor was included in some bundles.

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