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10 Best 40mm Smartwatch 2025 in the United States

Name: Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band S/M. Fitness & Sleep Tracker, Crash Detection, Heart Rate Monitor
Brand: Apple
Price: 276 USD
Availability: InStock

From leading brands and best sellers available on the web.

2025 Smart Watch for Kids 6-12 [Kids GPS Tracker/Video Call] Kids Smart Watches Boys Girls, Kids Watch with GPS Tracker, School Mode, Safety Alert, GPS Tracker for Kids Smart Watch SIM Card, Black

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Winner

Apple

Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band S/M. Fitness & Sleep Tracker, Crash Detection, Heart Rate Monitor

9.8

score

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2025 Smart Watch for Kids 6-12 [Kids GPS Tracker/Video Call] Kids Smart Watches Boys Girls, Kids Watch with GPS Tracker, School Mode, Safety Alert, GPS Tracker for Kids Smart Watch SIM Card, Black

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Apple

Apple Watch Series 9 [GPS 45mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band M/L. Fitness Tracker, ECG Apps, Always-On Retina Display, Water Resistant

9.6

score

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Apple

Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminium Case with Starlight Sport Band M/L. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Retina Display

9.4

score

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Garmin

Garmin Forerunner® 255 Music, GPS Running Smartwatch with Music, Advanced Insights, Long-Lasting Battery, White

9.1

score

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SAMSUNG

SAMSUNG Galaxy Watch 6 40mm Bluetooth Smartwatch, Fitness Tracker, Personalized HR Zones, Advanced Sleep Coaching, Heart Monitor, BIA Sensor for Health Wellness Insights, Big Screen, US Version, Gold

8.9

score

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Garmin

Garmin Venu® Sq 2 GPS Smartwatch, All-Day Health Monitoring, Long-Lasting Battery Life, AMOLED Display, Slate and Shadow Gray

8.6

score

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SAMSUNG

SAMSUNG Galaxy Watch 7 40mm Bluetooth AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, 2024, Cream [US Version, 1Yr Manufacturer Warranty]

8.3

score

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Coucur

Smart Watch for Men Women, 1.96" Fitness Tracker Running Watch (Answer/Make Call), IP68 Waterproof, Pedometer, Sleep/Step/Activity/Heart Rate Monitor, 110+ Sport Modes Smartwatch for Adroid iOS Phone

8.0

score

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Laoziniu

Smart Watch for Men，with Answer/Make Call 100+ Sports Modes Fitness Smart Watch, IP68 Waterproof 80 Days Extra-Long Battery Heart Rate/Blood Oxygen/Sleep Monitor Smartwatch for Android and iOS

7.7

score

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#10

Apple

Apple Watch SE (2nd Gen) [GPS + Cellular 40mm] Smartwatch with Aluminum Case with Silver Sport Loop. Fitness & Sleep Tracker, Crash Detection, Heart Rate Monitor, Retina Display, Carbon Neutral

7.4

score

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More products we considered

FITVII Health & Fitness Tracker (Answer/Make Calls), Smart Watch with 24/7 Heart Rate and Blood Pressure, Sleep Tracking, Blood Oxygen Monitor, 120+ Sport Mode Activity Tracker for Women Men

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ENOMIR Smart Watch for Women Men (Answer/Make Calls) Compatible with iPhone/Android/Samsung, Alexa Built-in, [1.91" HD Screen] Waterproof Fitness Watch with Heart Rate/Sleep/SpO2 Monitor(Pink)

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HOTMIFIT GPS Smart watch for Men Women, 3D Curved Glass, Full Stainless Steel Body, 6 Satellite Positioning, Compass, 100M Waterproof, Answer/Make Call, 1.64" AMOLED Screen, Compatible for Android iOS

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HOTMIFIT GPS Smart Watch for Men, 6 Satellite Positioning, Compass, Stainless Steel Body, 50M Waterproof, 480mAh Extra-Large Battery, Answer/Make Call, 1.43" AMOLED Screen, Compatible to Android iOS

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Smart Watch for Men Women with Quick Text Reply Heart Rate Blood Oxygen Stress and Sleep Monitor, 1.8" Screen for Android Phones iPhone Compatible IP68 Waterproof Smartwatch Fitness Tracker (Blue)

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10 Best 40mm Smartwatch 2025 in the United States

2025 Smart Watch for Kids 6-12 [Kids GPS Tracker/Video Call] Kids Smart Watches Boys Girls, Kids Watch with GPS Tracker, School Mode, Safety Alert, GPS Tracker for Kids Smart Watch SIM Card, Black

Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band S/M. Fitness & Sleep Tracker, Crash Detection, Heart Rate Monitor

2025 Smart Watch for Kids 6-12 [Kids GPS Tracker/Video Call] Kids Smart Watches Boys Girls, Kids Watch with GPS Tracker, School Mode, Safety Alert, GPS Tracker for Kids Smart Watch SIM Card, Black

Apple Watch Series 9 [GPS 45mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band M/L. Fitness Tracker, ECG Apps, Always-On Retina Display, Water Resistant

Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminium Case with Starlight Sport Band M/L. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Retina Display

Garmin Forerunner® 255 Music, GPS Running Smartwatch with Music, Advanced Insights, Long-Lasting Battery, White

SAMSUNG Galaxy Watch 6 40mm Bluetooth Smartwatch, Fitness Tracker, Personalized HR Zones, Advanced Sleep Coaching, Heart Monitor, BIA Sensor for Health Wellness Insights, Big Screen, US Version, Gold

Smart Watches for Women [Make Call/Answer/400+Watch Face] Android & iPhone Compatible, 1.27" Fitness Tracker 24/7 Heart Rate Sleep Steps SpO2 Monitor, IP68 Waterproof Valentines Gifts,3 Bands (20mm)

2025 Smart Watch for Kids 6-12 [Kids GPS Tracker/Video Call] Kids Smart Watches Boys Girls, Kids Watch with GPS Tracker, School Mode, Safety Alert, GPS Tracker for Kids Smart Watch SIM Card, Black

ENOMIR Smart Watch for Women Men with Bluetooth Call,Smartwatch with Alexa Built-in,Heart Rate SpO2 Sleep Monitor,5ATM Waterproof,Step Calorie Activity Trackers and Smartwatches for iOS&Android Phones

Smart Watch for Men Women - Answer/Make Calls/Quick Reply/AI Voice Assistant, 1.83" for Android iPhone Samsung Compatible IP68 Smartwatch Blood Oxygen Heart Rate Fitness Tracker (Black, 1.83")

Smart Watch for Women Men Answer/Make Calls/Quick Reply, Samsung Android iPhone Compatible Fitness Tracker with 100+ Sport Modes, Heart Rate Blood Oxygen Sleep Monitor IP68 Waterproof Smartwatch

Garmin Venu® Sq 2 GPS Smartwatch, All-Day Health Monitoring, Long-Lasting Battery Life, AMOLED Display, Slate and Shadow Gray

SAMSUNG Galaxy Watch 7 40mm Bluetooth AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, 2024, Cream [US Version, 1Yr Manufacturer Warranty]

Smart Watch for Men Women, 1.96" Fitness Tracker Running Watch (Answer/Make Call), IP68 Waterproof, Pedometer, Sleep/Step/Activity/Heart Rate Monitor, 110+ Sport Modes Smartwatch for Adroid iOS Phone

Smart Watch for Men，with Answer/Make Call 100+ Sports Modes Fitness Smart Watch, IP68 Waterproof 80 Days Extra-Long Battery Heart Rate/Blood Oxygen/Sleep Monitor Smartwatch for Android and iOS

Apple Watch SE (2nd Gen) [GPS + Cellular 40mm] Smartwatch with Aluminum Case with Silver Sport Loop. Fitness & Sleep Tracker, Crash Detection, Heart Rate Monitor, Retina Display, Carbon Neutral

FITVII Health & Fitness Tracker (Answer/Make Calls), Smart Watch with 24/7 Heart Rate and Blood Pressure, Sleep Tracking, Blood Oxygen Monitor, 120+ Sport Mode Activity Tracker for Women Men

ENOMIR Smart Watch for Women Men (Answer/Make Calls) Compatible with iPhone/Android/Samsung, Alexa Built-in, [1.91" HD Screen] Waterproof Fitness Watch with Heart Rate/Sleep/SpO2 Monitor(Pink)

HOTMIFIT GPS Smart watch for Men Women, 3D Curved Glass, Full Stainless Steel Body, 6 Satellite Positioning, Compass, 100M Waterproof, Answer/Make Call, 1.64" AMOLED Screen, Compatible for Android iOS

HOTMIFIT GPS Smart Watch for Men, 6 Satellite Positioning, Compass, Stainless Steel Body, 50M Waterproof, 480mAh Extra-Large Battery, Answer/Make Call, 1.43" AMOLED Screen, Compatible to Android iOS

Smart Watch for Men Women with Quick Text Reply Heart Rate Blood Oxygen Stress and Sleep Monitor, 1.8" Screen for Android Phones iPhone Compatible IP68 Waterproof Smartwatch Fitness Tracker (Blue)