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Garmin D2 Air X15 vs Garmin Forerunner 255 comparison

 Compare Garmin D2 Air X15
Garmin D2 Air X15
Compare Garmin Forerunner 255
Garmin Forerunner 255
key specs
Strap ColourBlackBlue
Display Size35mm33mm
Compatible OSAndroid and iOSAndroid, iOS
Strap MaterialSiliconeSilicone
Dial ShapeRoundRound
Display TypeAMOLED-
Ideal ForUnisexUnisex
general
BrandGarminGarmin
ModelD2 Air X15Forerunner 255
Release dateOctober 22, 2025June 30, 2022
Model NameGarmin D2 Air X15Forerunner 255
Dial ShapeRoundRound
Strap ColourBlackBlue
Strap MaterialSiliconeSilicone
SizeRegular-
Water Resistance Depth5 ATM-
UsageFitness & Outdoor-
Ideal ForUnisexUnisex
Model Number-010-02641-53
Dial Colour-Black
Touchscreen-1,3-inch
Water Resistant-5 ATM
dimensions
Weight (g)38.0049.00
Width-45.6
Height-45.6
Thickness-12.9
product details
SensorHeart Rate Monitor, Stress, Sleep, Pulse Ox blood oxygenGPS, GLONASS, Galileo, Multi-frequency positioning, Garmin Elevate wrist heart rate monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer, SpO2
Compatible DeviceAndroid and iOS-
NotificationCall Notification, Smartphone Apps Notifications-
Battery Life10 days14 Days
Notification Type-Smart Notifications
Rechargeable Battery-Yes
connectivity features
Call FunctionYes-
BluetoothYesYes
Third Party App SupportYes-
Call FeaturesMake and Receive calls-
Other Connectivity FeaturesGPS, Galileo, Glonass, Beidou, QZSS-
GPS-Yes
platform and storage features
Compatible Operating SystemAndroid and iOSAndroid, iOS
RAM8GB-
Internal Memory-4GB
camera and display features
Display Resolution454 x 454260x260
Display Size35mm33mm
Display TypeAMOLED-
fitness and watch functions
Step CountYesYes
Calorie CountYesYes
Heart Rate MonitorYesYes
AltimeterYesYes
CompassYesYes
CalendarYes-
Alarm ClockYes-
Date & Time DisplayYesYes
LanguageEnglish-
Other Fitness Features-Wrist-based Heart Rate, Daily Resting Heart Rate, Abnormal Heart Rate Alerts, Respiration rate, Pulse Ox Blood Oxygen Saturation, Fitness Age, Body Battery Energy Monitor, All-day Stress, Relaxation reminders, Relaxation breathing timer, Women's Health, Health snapshot
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