Garmin D2 Air X15 vs Fitbit Ionic comparison

Show Only Differences Highlight Differences	Garmin D2 Air X15	Fitbit Ionic
key specs
Strap Colour	Black	-
Display Size	35mm	32mm
Compatible OS	Android and iOS	Android, iOS
Strap Material	Silicone	Elastomer
Dial Shape	Round	-
Display Type	AMOLED	-
Ideal For	Unisex	Unisex
general
Brand	Garmin	Fitbit
Model	D2 Air X15	Ionic
Release date	October 22, 2025	August 1, 2017
Model Name	Garmin D2 Air X15	-
Dial Shape	Round	-
Strap Colour	Black	-
Strap Material	Silicone	Elastomer
Size	Regular	Regular
Water Resistance Depth	5 ATM	50 metres
Usage	Fitness & Outdoor	-
Ideal For	Unisex	Unisex
Touchscreen	-	Yes
Water Resistant	-	Yes
dimensions
Weight (g)	38.00	303.30
product details
Sensor	Heart Rate Monitor, Stress, Sleep, Pulse Ox blood oxygen	3-axis Accelerometer, 3-axis Gyroscope, Optical Heart Rate Sensor, Altimeter, Ambient Light Sensor
Compatible Device	Android and iOS	Android, iPhone
Notification	Call Notification, Smartphone Apps Notifications	Yes
Battery Life	10 days	-
Notification Type	-	Vibration
Battery Type	-	Lithium Polymer
Charge Time	-	120 minutes
Stand By Time	-	Upto 6 Days
Rechargeable Battery	-	Yes
connectivity features
Call Function	Yes	-
Bluetooth	Yes	Yes
Third Party App Support	Yes	-
Call Features	Make and Receive calls	-
Other Connectivity Features	GPS, Galileo, Glonass, Beidou, QZSS	NFC
Wi-Fi	-	Yes
GPS	-	Yes
platform and storage features
Compatible Operating System	Android and iOS	Android, iOS
RAM	8GB	-
Operating System	-	Fitbit OS
camera and display features
Display Resolution	454 x 454	240x180
Display Size	35mm	32mm
Display Type	AMOLED	-
fitness and watch functions
Step Count	Yes	Yes
Calorie Count	Yes	Yes
Heart Rate Monitor	Yes	Yes
Altimeter	Yes	-
Compass	Yes	-
Calendar	Yes	Yes
Alarm Clock	Yes	Yes
Date & Time Display	Yes	Yes
Language	English	-
Chronograph	-	Yes
Number of Buttons	-	3

Popular Smartwatch Brands