Best Heart Rate Watch Without Chest Strap

LIGE Smart Watch for Men, 1.39'' HD Tactical Military Smart Watches with Bluetooth Call/Heart Rate/Blood Pressure/Sleep Monitor, Watch with 100+ Sport, IP68 Smartwatch with 3 Straps for iOS Android

AITAFY Smart Watch for Men Women with Bluetooth Call, Compatible with iOS/Android Phones, Alexa Built-in, 1.83" HD Screen with Heart Rate/Sleep/SpO2 Monitor, 100 Sports Fitness Activity Tracker

Smart Watch for Men with Bluetooth Call 1.9" HD Touch Screen Fitness Tracker with Heart Rate Sleep Monitor SpO2 116 Sports Modes IP68 Waterproof Smartwatch for Android iOS AI (Black)

Smart Watch for Men Women with Bluetooth Call, IP68 Waterproof Fitness trackers with Heart Rate Blood Pressure Blood Oxygen Sleep Monitor, 1.96" HD Smartwatch Android & iOS (Matte Black)

LIGE Military Smart Watch for Men(Answer/Make Call),1.96" Display with 400mAh,100+ Sport Modes Fitness Tracker/Heart Rate Sleep Health Monitor/5ATM Waterproof for Android iOS

Smart Watch [GPS, Alexa Built-in], 24/7 Heart Rate Monitor with HRV, SpO2/Stress/Sleep Tracker, Bluetooth Call, 3ATM Waterproof, 12-Day Battery, 100+ Sport Modes Fitness Tracker Watches for Men Women

Smart Watch for Men Women with Bluetooth Call, 1.91" HD Touch Screen Fitness Watch with DIY Dial, Blood Oxygen, Sleep, Heart Rate Monitor, 113+ Sports Modes, IP68 Waterproof Smartwatch for Android/iOS

Polar H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black

Fitness Watch for Men Women, 24/7 Heart Rate/SpO2/Sleep Monitor Watch, Fitness Tracker with Calorie Step Counter Pedometer, IP68 Waterproof Smart Watches for iPhone Android (Obsidian Black)

COOSPO Armband Heart Rate Monitor HW706, Bluetooth4.0 ANT+ HR Optical Heart Rate Sensor for Sport Fitness, Chargeable Dual HR Band IP67 HRM, Compatible with Peloton,Wahoo,Polar,Strava,Zwift,DDP Yoga