Fitbit One vs Fitbit Flex

Fitbit One

Fitbit Flex

Fitbit One is fitness tracker inside a clip, which is the biggest advantage for many users who dislike wristbands. Despite the fact that it costs less than $100, it has features available for similar devices of the wristband type. Read More
Fitbit Flex is a fitness wristband for active people. Through its many sensors, it analyses your daily activity and notifies you of the achievement of its objectives. Thanks to the numerous sensors, applications and compatibility with multiple devices it is one of the most versatile trackers in price to $90 Read More

1. Specifications

Fitbit One
VS
Fitbit Flex
Clip
Type
Wristband
Black
Burgundy
Colours
Black
Slate
Violet
Lime
Pink
Navy
Tangerine
Teal
Red
Blue
not applicable
Wristband Size
Small 5.5” - 6.5” Large 5.5” - 7.9”
The Zip tracker is made of thermoplastic. The clip is made of silicone and metal.
Materials
wristband is made of flexible, durable elastomer material & surgical-grade stainless steel clasp
OLED Screen
Display
5 white indicator lights
10-14 days
Battery life:
up to 5 days
Lithium-polymer
Battery type:
Lithium-polymer
1 to 2 hours
Charge time:
One to two hours
-4° to 113°F
Operating temperature:
-4° to 113°F
30,000 feet
Maximum operating altitude:
30,000 feet
It is sweat, rain and splash proof. However, the device is not swim proof.
Water Resistance
It is sweat, rain and splash proof. However, the device is not swim proof.
Price

Fitbit One

Fitbit Flex

Fitbit One is equipped with a clear monochrome OLED display where we can read in addition to time and typical fitness function read the notifications of our smartphone. There are only two colors available for this device. Applied rechargeable battery allows for 10 to 14 days of work, which is an excellent result in this class. Unfortunately, despite the basic water resistance, the device will not be able to be used while swimming. Read Full Specs
Fitbit Flex is equipped with five white LEDs light indicator that notifies us regarding the daily progress and the amount you missed to achieve the objective. (See LEDs light up as you progress toward your daily goal). Fitbit Flex is available in 10 colors. Applied rechargeable battery allows for five days of work which is standard in this class and its charging time is one to two hours,. Unfortunately, despite the basic water resistance, the device will not be able to be used while swimming. Read Full Specs

2. Features

2a. Tracking Features

Fitbit One
VS
Fitbit Flex
yes
Activity & Inactivity
yes
yes
Calorie Intake
yes
yes
Calories Burned
yes
yes
Distance
yes
yes
Elevation/Stairs
no
yes
Steps
yes
yes
Goal Setting
yes
no
Heart Rate
no
yes
Sleep Quality
yes
yes
Sleep Time
yes
no
GPS tracking
no

Fitbit One

Fitbit Flex

Fitbit One is equipped with typical sensors for counting steps, distance travelled, calories burned, and track daily activity. The sensors cannot only show, the distance travelled, but also defeated elevation (floors climbed). This device allows setting your own goals and achievements and displays the status of their implementation. Fitbit One measures the quality of your sleep .
Fitbit Flex is equipped with typical sensors for counting steps, distance travelled, calories burned, and track daily activity. This device allows you to set your own goals and achievements and shows the status of their implementation. Fitbit Flex measures the quality of your sleep and has a mild vibrating alarm that wakes you without waking your partner.

2b. Other Features

Fitbit One
VS
Fitbit Flex
yes
Clock
no
yes
Alarm
yes
yes
Barcode Scanner
yes
yes
Online Portal
yes
yes
Reminders
yes
no
Music control
no
no
Notifications
no
no
Call notifications
no
no
Extra non standard
no

Fitbit One

Fitbit Flex

Fitbit One also functions as a watch. You can also check the current statistics of your activities.
Thanks to the barcode scanner and extensive food database, the device quickly enters data that will help calculate calories consumed.

3. Synchronization & Compatibility

Fitbit One
VS
Fitbit Flex
iPhone 4S and later
iPad 3 and later
iOS Compatibility
iPhone 4S and later
iPad 3 and later
yes
Android Compatibility
yes
yes
Windows Phone Compatibility
yes
Mac OS X 10.6 and up
Mac OS X Compatibility
Mac OS X 10.6 and up
Windows Vista and later
Windows Compatibility
Windows Vista and later
Endomondo
IFITT
Lose It!
MapMyFitness
My Fitness Pal
Spark People
Compatible Applications
Endomondo
IFITT
Lose It!
MapMyFitness
My Fitness Pal
Spark People

Fitbit One

Fitbit Flex

Fitbit One is compatible with a huge number of devices. You can watch the progress in your training on your computer or smartphone. Fitbit One is compatible with iOS, Windows Phone, Mac OS X, Windows, and Android. Through numerous applications, you can share your results with friends, which certainly will further motivate you to continue the effort. Available trap allow you to keep a detailed record of your activity, of meals, quality of sleep, and many others. And if you ever decide on another more expensive model from Fitbit, all your data stored in the cloud will be available for the new device.
You can view progress in your training on your computer or smartphone. Fitbit Flex is compatible with iOS, Windows Phone, Mac OS X, Windows, and Android. Through numerous applications, you can share your results with friends, which certainly will further motivate you to continue the effort. Available trap allows you to keep a detailed record of your activity, of meals, quality of sleep, and many others.

4. The Bottom Line

Fitbit One
VS
Fitbit Flex
4.3 out of 5 stars (12649 Reviews)
Read Customer Reviews
Customer Reviews
3.7 out of 5 stars (22758 Reviews)
Read Customer Reviews
• Price
• Good support for users on the part of Fitbit
• Compatible with multiple systems and devices
• Can be worn "in the pocket"
Pros
• Price
• Design
• Good support for users on the part of Fitbit
• Compatible with multiple systems and devices
• Inability to swim with the device
• A limited number of functions
• Driving car count as steps
Cons
• Inability to swim with the device
• Short battery life
• No display of information
• Lacks a watch
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