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Fitness Tracker

Fitbit Charge 4 vs Fitbit Flex 2

Fitbit Charge 4

Fitbit Charge 4

150 reviews

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Fitbit Flex 2

61 reviews

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Wirecutter · The Best Smartwatches, Fitness Trackers, and Running Watches for 2021

Great sleep tracking

Provides all the data of Fitbit's highest end watch

More accurate than cheaper trackers

Two brightness settings, dim and normal

Budget friendly activity tracker

Great for discreet tracking

Waterproof

Comfortable to wear

Offers basic notifications for texts and calls

Small and unobtrusive

Not waterproof

Charging process can be difficult to align correctly

Brightness settings may not be visible in direct sunlight

Not a smart watch

No heart rate monitor

Short battery life

Verdict

The Fitbit Charge 4 is a budget-friendly activity tracker that offers good sleep tracking. It has two brightness settings, dim and normal, which may not be visible in direct sunlight. The device is not waterproof and the charging process can be difficult to align correctly. However, it provides all the data of Fitbit's highest end watch and is more accurate than cheaper trackers.

Verdict

The Fitbit Flex 2 is a simple and discreet fitness tracker that is waterproof and comfortable to wear. It offers basic notifications for texts and calls, but does not have a heart rate monitor or long battery life. However, it is small and unobtrusive, making it ideal for those who want to wear a normal watch on one wrist and the Flex 2 on the other.

Reviews by Topic

Our analysis shows how reviewers feel about different topics. Please note these are not full reviews.

Activity Tracking

I ordered a Fitbit Charge 4, pretty excited. Currently, I'm using a no-name tracker with some Chinese spyware (probably) software.

Positive

reddit.com/r/fitbit

Strong n Hype, low on Delivery

”Congrats! You just earned your Italy badge” huh? What! What in the world is this iodiocy? OHHHHHH, I see I moved the equivalent distance of walking the length of the country of Italy. How moronic! I’ve probably consumed the same amount of calories that Chicagoans eat in a week - SO WHAT!? The problems actually started early on. Paring the device, setup, tech support, navigation - terrible! This just contributes to the pseudo-science that diet plans, hucksters and Amazon Whole Foods pedals. Its syncing capabilities are horrible and it can’t calculate anything that is an anomaly

Design

Good fitbit, but not durable.

I wear my FitBit everyday, but am careful not to get it wet. I like the features available and the interface, but the Fitbit itself is not durable and is very poorly designed. Setting it up to charge seems to need a careful dance to ensure alignment of points or else it won't charge and it takes 2-3 attempts to make it happen. We have 2 Fitbits bought at different times and its the same issue with both, I hope that the powers that be will redesign the charger coz this one sucks big time

Love it just a little upset

Honestly I think they should leave it in the large because I've never seen someone wear a small. Since my wrist isn't to big but isn't small enough to fit in a small, the extra clasp holes just move around and hang on my wrist which looks ridiculous. Maybe if they had a loop to hold the extra material in place it would look better. I have problems with getting it to sync to my phone at times

Battery Life

Happy with my Charge 4, but I wouldn't get the special edition again...

There’s a lot more plastic on the Charge 4, but the addition of Gorilla Glass is a huge improvement. After a year, the screen on my Charge 2 was barely legible until I polished it. I feared that the Charge 4 would take longer to charge, but it charges just as fast, if not faster. Battery life has been excellent so far with the GPS off

The battery life also isn’t the best. The flex battery lasted 6-7 days wearing it every day all day pretty much where as the versa 2 last maybe 4 days, usually not more than 3. The motion activated screen doesn’t work. You have to flip your wrist dramatically before the screen turns on

Negative

reddit.com/r/fitbit

Notifications

Motivate and Reminder

The basic operation has served to remind and motivate me to be active. I'm conscious of my eating and physical activity while I'm wearing it. The exercise sensor has mistaken a motorcycle ride for a bike ride. I'm not sure how it figured I was biking at those speeds

Poor performance for a "new" item

Before submitting this review I wore the item for 2 days in order to be objective. For this to be a new item, it requires charging everyday which doesn't help me when I need to have the trcker on my wrist instead of a charging sttaion. I've tripled checked my notifiction settings. It doesnt notify me of incoming calls when my cell phone is literally less than 1 ft awy from me In my pocket)

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