The Withings Go is water-resistant up to 50m. Not only can it easily handle wet weather and sweat, but you can confidently wear it swimming or in the shower.
The display is wonderfully simple so there is 0 time spent on fiddling with settings and figuring out how the display works.
Pressing on the display will switch between the time, and your activity progress.
The Withings Go fitness tracker uses an E ink screen, the same as what you would find on an e-reader. Rather than being lit like a usual digital screen, it is much more similar to ink on paper. This makes it very easy to read even in very bright conditions or when in the water.
A common complaint is that the Withings Go fitness tracker will underestimate the steps taken. This is the opposite of many trackers which are often known for overestimating the step count.
The Withings Go is not a good option for someone wanting accurate data on their sleep habits.
It often doesn't detect times you wake up at all, or sometimes registers them as "light sleep". Many users have reported the number of hours spent sleeping being consistently off by a couple hours or more.
The Vivofit Jr. runs on battery so there is no need to worry about keeping it charged.
With a battery life of up to 1 year, it can go longer without a battery change than most other fitness trackers.
The Vivofit 3 has multiple serious issues impacting its reliability which means you're taking a gamble by purchasing it. At $80, you can get trackers with much better build qualities and a similar set of features.
The Fitbit Zip fitness tracker is very small, so you can easily wear it somewhere that it will be hidden (belt, pocket, etc.). You won't have to worry about it drawing attention from other kids if you don't want it to.
The contacts in the device are very sensitive. If you don't place the battery in just right, it will only work for a short period of time before the battery needs to be readjusted or replaced.
Even when following instructions provided by the company, some people report that still can't get it working properly. The battery may end up lasting days instead of the promised 4-6 months.
You can see how to properly change the battery here.
The tiny size of the Fitbit Zip makes it very easy to lose track of.
Rather than a wrist watch like many other trackers, it only has a slide on clip. The clip is fairly secure for normal activity, but you may knock the tracker off without realizing it.
The app doesn't only display the stats from your device, it also lets you track a variety of different health-related stats by entering them manually. You can log your food for the day, how you slept, activity, weight, and more.
The Fitbit Zip fitness tracker wirelessly syncs with both PC and smartphones via the Fitbit app. After getting it set up you don't even think about syncing, it's just automatic.
The Fitbit Zip only tracks distance, steps, and calories burned. It's basically a pedometer with a smart tracking platform you can use for manually tracking the rest of your day. It can't tell you stairs climbed or heart rate, and there is no alarm, sleep tracking, or GPS.
The Fitbit Zip fitness tracker runs on a 3-volt lithium-ion battery that lasts between 4 and 6 months. It requires getting a new battery every time it runs out of charge.