When comparing Sensoria Fitness Socks vs Fitbit Charge 2, the Slant community recommends Fitbit Charge 2 for most people. In the question“What are the best fitness trackers that pair with iPhones?” Fitbit Charge 2 is ranked 1st while Sensoria Fitness Socks is ranked 10th. The most important reason people chose Fitbit Charge 2 is:
It gives you a lot of stats on your activities thanks to the GPS, altimeter, and heart rate monitor. It can track your sleep, show you alerts directly on the display, and offers a variety of helpful features such as reminders to move and a breathing function that helps you relax.
Specs
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Pros
Pro Provides feedback on running technique through voice messages
Sensoria fitness tracker gathers information on how a runner puts pressure on their foot and analyzes it in real-time. If the sock notices something that could potentially cause injuries, it warns the runner with a voice message and suggests a way to improve his technique.
Pro Motivational audio cues
A virtual coach can be set up to congratulate when personal records get beaten, cheer when doing well, and warn when not doing as well as hoped. The frequency of audio cues can be adjusted.
Pro Allows adjusting settings to preferred running style
There are multiple valid ways of running. To accommodate runners of different styles, Sensoria fitness tracker allows setting up desired landing positions and cadence as well as turn on a metronome to help out with execution.

Pro Easy access to data
Sensoria provides companion apps for iOS, Android and Windows phones, as well as a web dashboard.

Pro Socks can be washed
Though the fitness tracker is not fully waterproof, the pressure sensitive electronic textile used in the socks can safely be washed and machine dried.
Pro Gives you a lot of features for the price
It gives you a lot of stats on your activities thanks to the GPS, altimeter, and heart rate monitor. It can track your sleep, show you alerts directly on the display, and offers a variety of helpful features such as reminders to move and a breathing function that helps you relax.
Pro Reminds you to move throughout the day
The fitness tracker will give you hourly reminders to get up and move for a few minutes, so you're not spending your whole day hunched over a desk.
Pro Great choice of replacement bands
Including regular vinyl bands, leather, metal, luxury, etc.
Pro The large display is easy to read
The Charge 2 has a very clear black and white display that's easy to read in both light and dark settings. It gives you a lot of activity stats directly on the display, which keeps you from needing to frequently check the smartphone app.
Pro Only needs to be charged every 4-5 days
Compared to other fitness trackers with large display screens, and Charge 2 has an impressive battery life. It can go 4-5 days without needing to be recharged, so there is minimal interruption to your tracking.
Pro Great ecosystem
Lots of users, nice apps (Win10 UWP app as well), etc.
Cons

Con Unreliable altimeter
The socks sometimes have trouble detecting changes in elevation.

Con Only one sock is active at a time
The socks feed data to a single anklet, and information for both feet can't be gathered at the same time yet. This functionality is planned.

Con Doesn't catch some bad running techniques
Currently the fitness tracker covers a relatively small subset of bad running techniques. It's possible to be in a situation where the technique is bad and the device is not aware of it.
Con Very few customization options currently available
Some of the fitness tracker's customization options are planned, but not yet available.
Con Weak vibration causes alerts to easily go missed
The Charge 2 has a very weak vibration that is easy to miss, especially when you're active. As a result, it's easy to miss silent alarms or reminders to get up and move.
Con No smart alarm
Although the feature has been requested by the community since 2014.
Con No actionable notifications / call and text only
You can only see call and text notifications, no Facebook, Twitter, email, etc. And you can only see them, you cannot reply, delete, dismiss, etc.
Con App is not intuitive and terrible on Android
It is clunky and annoying, but works part time. There's a report on another Android that it just doesn't work. No alerts for 250 steps per hour. Not accurate. Clunky non intuitive functionality.
Con No water resistance
It is not water proof or even water-resistant. The watch will still function if you get a little splash of water on it, but you definitely can’t take it if you go swimming,
Con Lower quality screen that scratches easily
Rather than gorilla glass which is commonly used in the more expensive trackers, the Charge 2 fitness tracker uses a thick plastic display screen. It makes the device appear lower quality and scratches very easily.
Con Lavender band turns blue after a short period of wear
The specific color of band can start to turn blue after only the first day of wear. It very quickly looks stained and dirty.
