Product Comparison: Fitbit Flex vs Fitbit Charge HR

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Fitbit Flex Wireless Activity + Sleep Wristband

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Fitbit Charge HR Wireless Activity Wristband

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General Specifications

Brand

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.

Key Specs

Type

Wristband

Color

Black (also available in 7 colors)

Black (and also available in 5 colors)

Battery life

5 days

Heart rate monitor

Yes

Heart rate monitor

What customers say about "Key Specs"

Fitbit Charge HR Wireless Activity Wristband

The battery lasts for 4 days of constant usage.
The heart rate monitor is nice when I'm looking at how many calories I burned.
I love that it has a constant heart rate monitor and calorie count! I have it synced with MyFitnessPal and it works great!
Shortish battery life, only lasts a few days
The fundamental issue with this device is also that the heart-rate measurement is not accurate.

Size & Weight

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

What customers say about "Size & Weight"

Fitbit Charge HR Wireless Activity Wristband

The band is small and stylish.
The design of the watch makes it very comfortable and very fashionable. I am able to wear it with anything.
The material is very soft to the skin and it doesn't cause any discomfort at all
The only downfall about the Fitbit is the its is only water resistant , not water proof.
Only down fall is it's NOT WATERPROOF.Other than that the product is great!!

Details

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

Protection

Waterproof

Rain, splash and sweat-resistant

Bluetooth

4.0

Display

OLED

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

Vibration motor
Altimeter

What customers say about "Details"

Fitbit Charge HR Wireless Activity Wristband

The stair tracker is slightly off, but I like being able to see the calorie count, heart rate, clock, and number of steps taken at the touch of a button.
I love the way it alerts me when my phone rings when I am busy and would otherwise not hear it. It displays on your wrist who is calling and vibrates
Good tracker so far.I like the display on, on flicking/turning the hand feature.
It's awesome!!It also has the ability to set silent alarms and it tells you when someone is calling your cell phone!
The most value is in the fact that it collects data 24 hours a day, but the LED and the accelerometer are pretty inaccurate
Bluetooth is on 24/7 - You cannot switch it off! I bought one and the discovered that there is no way to turn the Bluetooth transmitter off.

Body Metrics

Distance covered

Yes

Calories burned monitoring

Yes

Sleep quality tracking

Yes

Step counting

Yes

Sleep quality tracking
Distance covered

What customers say about "Body Metrics"

Fitbit Charge HR Wireless Activity Wristband

Got it for my 83 year old dad. His walking distance increased as he is encouraged by the instant feedback of his Fitbit.
It tracks your daily water intake, your weight, your hourly activity, your sleep patterns, your distance, calories burned, your active minutes, constant heart rate, your exercise mode, has a stopwatch, and even a relaxation assistant.
The addition of the app allows me to track my caloric intake against the calories I've burned all in hopes of shedding a few pounds.
I love my Fitbit! It syncs all of my activity, tracts sleep and heart rate! Super easy to use
The heart rate, sleep, milage, step counting and
Since I own a treadmill and an exercise bike that can measure distance and heart rate more accurately the fitbit is a disappointment.

Functions

Alarm signals

Yes

Caller ID

Yes