When comparing Fitbit Flex vs Xiaomi Mi Band 2, the Slant community recommends Fitbit Flex for most people. In the question“What are the best fitness trackers?” Fitbit Flex is ranked 10th while Xiaomi Mi Band 2 is ranked 16th. The most important reason people chose Fitbit Flex is:
The fitness tracker itself is a separate part from the wristband that can be taken out and put in a different band. There is 10 wristband colors to choose from in the official store, and custom bands available from third-party vendors.
Specs
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Pros
Pro Replaceable wristband with lots of style options available
The fitness tracker itself is a separate part from the wristband that can be taken out and put in a different band. There is 10 wristband colors to choose from in the official store, and custom bands available from third-party vendors.
Pro Comprehensive reports of your daily activities
The fitness tracker offers stats such as distance traveled, steps taken, calories burned, weight changes, calories consumed from foods and drinks, restless and awake states of sleep, etc.
Pro Integrates with over 40 apps so you can get the info that's most important to you
The fitness tracker can be integrated with a variety of apps that together can offer more in-depth and complete overview of your health and fitness patterns.
Pro Visually displays your daily progress using LED lights
There are 5 LED lights that, after double-tapping the wristband, display progress towards a goal. Each light indicates 20% progress towards the goal and the tracker allows choosing between steps, calories or distance to display this way.
Pro Tracks weight goals
Fitbit Flex lets users create a meal plan and log their progress from the dashboard menu.
Pro 5-7 day battery
Fitbit Flex will last up to a week on a single charge.
Pro Real-time Bluetooth syncing
Flex constantly shares data over Bluetooth, meaning that the device doesn't need to be taken off in order for the data to sync to an iOS or Android device.
Pro Social layer can increase motivation
Information regarding goals and progress can be shared with friends, and users can even challenge each other with goals.
Pro Quick food and drink logging
Because of Fitbit's database of foods' nutritional information, food and drink logging is easy.
Pro Comfortable
The lightweight rubber band is very comfortable to wear.
Pro Good product for the price
It's a great option if you're not looking to invest a lot of money but still want a tracker with a decent set of features.
Pro Same functionality of competitors for half the price or less
You get step tracking, sleep tracking, vibrate notifications, call notifications, clock, alarm, custom actions (via third party apps), heart rate reader (albeit not the most precise one) for the fraction of the cost of the competitors.
Cons
Con Oversensitive pedometer overestimates your step count
The fitness tracker's step counter often counts movement unrelated to walking or running as steps. It ends up reporting more movement than has actually happened.
Con Hard to get the tapping right to active LED display
The double tap to activate the LED display lights must be the appropriate pressure and timing in order for it to work correctly. This can be frustrating to some users.
Con Very unreliable build quality
There are many reports of the track malfunctioning right out of the box or after only a few hours of use. This includes the LED display not working, the heart rate function not working, and buyers being sent used products.
Con Heart rate monitor is very unreliable
Along with frequently not working at all, it has a tendency to be quite inaccurate. It struggles to read the HR when you're sweating as well so isn't useful during exercise.