Product Comparison: Fitbit Flex vs Fitbit Charge HR

Best Pick Best Pick
Fitbit Flex Wireless Activity + Sleep Wristband
Fitbit Flex Wireless Activity + Sleep Wristband
Fitbit Charge HR Wireless Activity Wristband
Fitbit Charge HR Wireless Activity Wristband
Check Price
Check Price
Brand Fitbit Fitbit
Model Flex Charge HR
Origin USA China
About the product Make fitness a lifestyle with Fitbit Flex—a slim, stylish device that tracks all-day activity like steps, distance, calories burned and active minutes. See how every day stacks up with LEDs that light up like a scoreboard as you get closer to your goal. Then wear it at night to measure your sleep quality and wake with a silent, vibrating alarm. Day or night, Flex fits comfortably around your wrist, is water-resistant, and has a 5-day battery life. It also syncs to computers and 150+ leading smartphones, so you can access your stats anywhere and see your progress in charts and graphs. Make every beat count with Charge HR—a high-performance wristband with automatic, continuous heart rate and activity tracking right on your wrist.
Type Wristband Wristband
Color Black (also available in 7 colors) Black (and also available in 5 colors)
Battery life 5 days 5 days
Weight Smal: 0.47, Large: 0.51 oz. -
Size(s) Smal: 5.5 – 6.9, Large: 6.3 – 8.2 in. Small: 5.4 - 6.2, Large: 6.2 - 7.6, X-large: 7.6 - 8.7 in.
Material Rubber Elastomer
Package Charging cable, wireless sync dongle, 1 small and 1 large wristband, flex tracker Wireless sync dongle, Charging cable
OS compatibility Mac, iOS, Android, Windows Mac, iOS, Android, Windows
Protection Waterproof Rain, splash and sweat-resistant
Bluetooth 4.0 4.0
Display No OLED
Distance covered Yes Yes
Calories burned monitoring Yes Yes
Sleep quality tracking Yes Yes
Step counting Yes Yes
Alarm signals Yes Yes
Certifications FCC, CE CE
Manufacturer warranty 1 year(s) -
Product manuals
Manufacturer link
Overstock 4.2 4.5
Ebay 5 4.0
Heart rate monitor - Yes
Features - Exercise Tracking, Record workouts in Exercise Mode, then see detailed workout summaries on your smartphone.
Altimeter - Yes
Vibration motor - Yes
Accelerometer - Yes
Control - Button
Caller ID - Yes
Newegg - 3.0
Walmart - 4.2
Amazon - 3.5

Price History