Amazfit EquatorApple Watch Series 3Bellabeat Leaf UrbanFitbit Alta HRFitbit Charge 2Fitbit VersaGarmin Vivoactive 3Garmin VivosportMisfit RayNokia Steel HR
Tech specs 
Size6.6 x 6.6 x 0.5 cm38.6mm x 33.3mm x 10.7mm (H x W x D)
32.0mm x 35.9mm x 10.7mm (H x W x D)
48mm x 28mm x 11.5mmWidth 15mm
(Sizes depend on type of band)
Width: 21mm
Small: 14 cm - 17 cm in circumference
Large: 16.5 cm - 20.6 cm in circumference
XL: 20.6 cm - 23.6 cm in circumference
Dimensions: 39.35mm x 39.35mm x 11.24mm
Large: Fits wrists 180 mm - 220 mm in circumference
Small: Fits wrists 140 mm - 180 mm in circumference
43.4 x 43.4 x 11.7 mm
Width: 21.0 mm
Thickness: 10.9 mm
12mm diameter, 38mm lengthWatch: 36 mm or 40mm diameter, 11.5 mm thickness (0.45")
MaterialHypoallergenic ceramic casingAluminum, Ceramic (White, Black), Sapphire Crystal, Gold Aluminium, Stainless Steel (Silver, Black)Wood composite combined with hypoallergenic stainless steel. Wristband is made of a flexible, durable elastomer. The tracker is made with surgical-grade stainless steel, and the buckle is made with aluminum.Stainless steel casing, elastomer strapThe Fitbit Versa classic band is made of a flexible, durable material similar to that used in many sports watches, and includes an aluminum watch case and buckle.Case material: fiber-reinforced polymer and stainless steel
Lens material: Corning® Gorilla® Glass 3
Bezel material: stainless steel
Case material: fiber-reinforced polymer
Lens material: chemically strengthened glass
Ray: Anodized aircraft-grade aluminum
Sport Band: TPU
Stainless Steel case with silicone strap
ChargingWireless chargingwireless chargingNoUSBUSB. USBUSBUSBNoUSB
BatteryLi-ionLithium-ionCR2032Lithium-polymerLithium-polymerLithium-polymerRechargeable lithium-ionRechargeable lithium-ionThree 393 button cellsCR2025
Battery lifeup to 10 days18+ hoursUp to 6 monthsup to 7 daysup to 5 days4+ days. Charge time (0-100%): 2 hours.GPS mode: Up to 13 hours
Smartwatch mode: Up to 7 days
GPS mode: Up to 8 hours
Smartwatch mode: Up to 7 days
Up to 6 months25 days
Water-resistanceIP68 (splash-proof)5 ATM (50 metres)Splash proofSweat, rain and splash proofSweat, rain and splash proof.up to 50 metres (swim-proof) - 5 ATM5 ATMSwimUp to 50 metresUp to 50 m (5 ATM)
Weight15 grams53 grams16.5 grams15 grams36 grams38 grams43 gSmall/medium: 24.1 g
Large: 27.0 g
8 grams49 grams (40mm version)
SensorAccelerometer, vibration motorAmbient light, heart rate sensor, accelerometer, gyroscope, GPS, barometric altimeter3-axis accelerometer, vibration motor3-axis accelerometer, Vibration motor, optical heart rate sensorOptical heart rate tracker, 3-axis accelerometer, altimeter, vibration motor3-axis accelerometer, 3-axis gyroscope, optical heart rate monitor, altimeter, ambient light sensor, vibration motor, wi-Fi antenna (802.11 b/g/n), NFC (some versions)GPS, barometric altimeter, compass, accelerometer, thermometer, heart rateGPS, barometric altimeter, compass, accelerometer, heart rate3-axis accelerometerDay & Night motion sensor
High precision MEMS 3-axis accelerometer
Low power consumption
Optical heart rate sensor
DisplayOLED Retina display with Force Touch
Ion-X glass (strengthened glass)
OLEDOLEDHi-res touchscreen (up to 1000 nits). Corning Gorilla Glass 3 display. 300x300 pixel resolution.sunlight-visible, transflective memory-in-pixel (MIP), 240 x 240 pixelssunlight-visible, transflective memory-in-pixel (MIP), 72 x 144 pixelsLEDAnalog
Screen size38mm: 340x272 pixels
42mm: 390x312 pixels
1.4-inch, 128 x 36 pixel resolution3.8 cmScreen Size 24.1 mm x 24.1 mm1.2" (30.4mm) diameter9.7 mm x 19.3 mm36 mm or 40mm diameter
ColorsEquator, Moonbeam, Sport, Rainbow, InfinityGold, Rose Gold, Space Gray, Silver, Black. Straps vary by editions.Silver, Rose, GoldBlack, Blue/Gray, Coral, FuchsiaBlack, Plum, Blue, Teal, Lavender Rose Gold, Black/Gunmetal Comes in a number of different versionsBlack, WhiteSlate, Limelight, Fuchsia FocusCarbon Black, Rose GoldBlack (36mm also comes in White)
OtherPLATFORM: watchOS
PROCESSOR: S3 dual-core processor
MEMORY: 512 RAM, 16GB storage
CONNECTIVITY: Bluetooth 4.0, NFC, WiFi, LTE and UMTS cellular radio
- Saves 7 days of detailed motion data – minute by minute.
- Saves daily totals for past 30 days
PLATFORM: Home Grown OS
PROCESSOR: Unknown
MEMORY: 7 timed activities, 14 days of activity tracking data
CONNECTIVITY: WiFi, Bluetooth
MEMORY: 7 timed activities, 14 days of activity tracking data
PLATFORM: Propriatory
PROCESSOR: N/A
MEMORY: N/A
CONNECTIVITY: Bluetooth 4.0
Activity tracking 
StepsYesYesYesYesYesYesYesYesYesYes
DistanceYesYesYesYesYesYesYesYesYesYes
Calories burnedYesYesYesYesYesYesYesYesYesYes
ActivityYesYesYesYesYesYesYesYesYesYes
FloorsYesYesYesYesYesNo
SleepYesYesYesYesYes (light, deep & REM)YesYesYesYes
Heart rateYes24/724/7Yes (Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times)YesYesYes
Vo2MaxYesYesYesYesNo
Stress & recoveryYesYesYes
UV exposureNo
Skin temperatureNo
Galvanic skin responseNo
Hydration level
Calorie intake
GPSYesConnected GPSYesYesNo
Running featuresWatch displays up to 5 metrics during your run (time, distance, current pace and average pace, heart rate, active calories or total calories).Preloaded running profiles, GPS based distance/time/pace, run workouts, foot pod capablePreloaded running profiles, GPS based distance/time/paceNo
Swimming featuresPool swim and open water swim. At the end of a swim, the watch displays the time of day the activity took place, dominant stroke used (auto-detection is used), distance, workout time, pool length, laps completed, average pace, average heart rate, and both active and total calories burned, as well as the weather at your location. Preloaded swim profiles; Pool swim metrics (lengths, distance, pace, stroke count/rate, calories); Stroke type detection (freestyle, backstroke, breaststroke, butterfly); Pool swim workouts
Swim efficiency (SWOLF)
Calories and duration
Other Smart alarm clock- Stream Apple Music direct to watch
Helps predict and manage stress (meditation exercises). Vibration alerts.Clock, auto sleep detection, silent wake alarm, auto exercise recognition.Guided breathing- SpO2 sensor that measures blood oxygen levels
- Guided breathing sessions
- Female health tracking
- gym workout tracking
- music control, find my phone, etc..
- Built in apps for running, golfing, cycling, swimming, snowboarding/skiing, paddle board, rowing, cardio, walking, strength training, rep counting, yoga, eliptical, stair-stepper and more.
- all day stress tracking
- gym workout tracking
- music control, find my phone, etc.
- Built in apps for running, cycling, cardio, walking, strength training, rep counting, stair-stepper.
Vibration alarmSilent alarm
Non-fitness functions 
Smartphone notificationsYesYesYesCall, text and calendar notificationsYesYesVibration Alerts for alarms, calls, texts, and movement remindersYes (text, call and email alerts)
On-board music storageYesYes, 2.5GB (300 songs) + access Pandora
Connected payYesYesYes
Links 
Affiliate link*AmazonAmazonAmazonAmazon | FitbitAmazon | FitbitAmazon | FitbitAmazon | GarminAmazon | GarminAmazon | MisfitAmazon | Nokia
Read moreReviewArticleArticleReviewReviewArticleReviewArticleArticleReview
*Disclosure: We are a professional review site that receives a small commission from sales of certain items, but the price is the same for you. See our affiliate disclosure page for more details.
**All tech specs and images on this page come from manufacturers. These may change over time as manufacturers sometimes update their devices. While we cannot guarantee absolute accuracy of information on this page, we promise to review this content regularly and do our best to bring you the most up-to-date information. To be absolutely sure of tech specs of a particular device, we recommend checking the manufacturer’s website.