Compare What is the lightest and most portable smartwatch with heart rate monitor? — Verified Specs | CompareTheSpecs

Product ⇅	Price ⇅	Heart Rate Accuracy (%) ⇅	Battery Life (hours) ⇅	Water Resistance (meter) ⇅	Screen Size (inches) ⇅	GPS Accuracy (meters) ⇅	Compatibility ⇅
Fitbit Charge 6 Tracker (GA05183-NA) US	£73.75 ≈	—	7-day	50m	—	—	Works with Android and iOS
Fitbit Charge 6 is a fitness tracker with heart rate tracking, built-in GPS for pace and distance, and a color touchscreen. It's water resistant up to 50m and is designed to pair with compatible exercise machines to display real-time heart rate. It also supports features like Google Maps and Google Wallet when used with a compatible phone. ★ Ideal for If you want the lightest portable option with heart rate monitoring and built-in GPS, Charge 6 fits because it includes a heart rate sensor plus built-in GPS for runs without needing your phone, and it's rated for up to 7-day battery life. Sources: Google Store Best Buy ABT Search on: Amazon Walmart eBay AliExpress JD.com Taobao
Withings ScanWatch Light 37mm US	£154.92 ≈	—	Up to 35 days	5 ATM	0.63 in	Good	iOS 18 and higher, Android 12 and higher
The Withings ScanWatch Light 37mm is a lightweight hybrid smartwatch with an analog watch face, discreet OLED display, continuous heart rate tracking, sleep tracking, activity tracking, and connected GPS. Its long battery life and compact design suit users who want essential health features without daily charging. ★ Ideal for It suits people seeking the lightest and most portable smartwatch with heart rate monitoring because its 37mm case weighs 27.1g, tracks heart rate continuously, and can last up to 35 days per charge. Sources: Withings Best Buy Search on: Amazon Walmart eBay AliExpress JD.com Taobao
Amazfit Active 2 Round Premium US	£95.92 ≈	Enhanced precision with PulsePrecision algorithm	Up to 10 days typical use	5 ATM	1.32 in	—	Zepp OS
The Amazfit Active 2 Round Premium is a lightweight stainless-steel smartwatch with a sapphire-glass AMOLED display, heart-rate monitoring, offline maps, and more than 160 workout modes. Its 10-day battery and 5 ATM water resistance make it suitable for everyday health tracking and fitness activities. ★ Ideal for At 31.65 g without the strap, this is a notably light and portable smartwatch with continuous heart-rate monitoring, built-in GPS, and up to 10 days of typical-use battery life. Sources: Amazfit Search on: Amazon Walmart eBay AliExpress JD.com Taobao
Garmin vívoactive 5 US	£140.19 ≈	Accurate during workouts with occasional minor errors	Up to 11 days in smartwatch mode	5 ATM	30.4 mm	Reasonably accurate without multiband GPS	iPhone and Android devices
The Garmin vívoactive 5 is a lightweight GPS smartwatch with a bright AMOLED display, wrist-based heart-rate monitoring, sleep coaching, Body Battery, and more than 30 sports apps. Its long battery life and swim-rated water resistance suit everyday fitness tracking, travel, and recreational exercise. ★ Ideal for At 36 g, with a 30.4 mm display, wrist-based heart-rate monitor, and up to 11 days of battery life, the vívoactive 5 is a highly portable choice for someone seeking a lightweight smartwatch with heart-rate monitoring. Sources: Amazon Best Buy Search on: Amazon Walmart eBay AliExpress JD.com Taobao
Apple Apple Watch SE 3 40mm Aluminum Case US	£183.74 ≈	—	Up to 18 hours	50m	40mm	—	iPhone 11 or later, including iPhone SE 2nd generation or later, with iOS 26 or later
The Apple Watch SE 3 40mm Aluminum Case is a lightweight smartwatch with an Always-On Retina display, heart-rate monitoring, built-in GPS, sleep tracking, fall detection, and crash detection. It suits iPhone users who want a compact everyday fitness and health smartwatch with swim-ready water resistance and all-day battery life. ★ Ideal for At 26.3g for the GPS model and 40mm in size, this is a highly portable smartwatch with a second-generation optical heart sensor for continuous heart-rate monitoring. Sources: Apple Best Buy Search on: Amazon Walmart eBay AliExpress JD.com Taobao