I'm going to suggest a couple of items that tested well and are products that I've used with confidence:
1) Fitbit Surge... and soon to be released, the Fitbit Blaze.
2) Hexoskin - sensor-integrated shirt that works well as a compression garment on its own, but I typically add another layer of compression over that based on my decades of training experience in high heat and humidity.
To my knowledge, there is nothing on the market as accurate as the Body Media. Jawbone bought them in order to acquire proprietary technology to improve their own product line, NOT to provide consumers with the BEST, MOST ACCURATE PRODUCTS.
I told them that I felt that they should have told consumers IN ADVANCE of the sale that this possibility existed. Quite frankly, if you sell anyone a package product, then I believe that you should be responsible for ensuring that the product functions... meaning, keep the website running or provide a desktop solution... or give up your information to a 3rd party who can supply a desktop solution.
This is another modern sales tactic that allows companies to indiscriminately sell products and then force consumers to purchase newer versions, even though their existing items are still physically able to perform.
I believe that a Class Action Lawsuit should be filed forcing either a refund or a FREE swap for the most advanced Jawbone.
Make no mistake, the wrist-worn tech is not as accurate as Body Media.
In fact, even with the Body Media purchase, Jawbone STILL never replaced Body Media in accuracy NOR did it even come in at second!
Now that's pathetic when you buy the tech that's the best and throw it away... basically telling serious fitness folks and those trying to most accurately track their calorie burn, that they can just go F*** themselves because nothing but money matters... not health!
Jawbone ONLY got into the "fitness" wear to get their piece of the market and they have failed the public miserably. They could have easily continued producing the MOST ACCURATE fitness wearable along with their more aesthetically desirable wrist bands, but they FALSELY believed that there was no difference in the two products and that their product was better and more acceptable.
It's only acceptable to those who are ignorant of the existence of Body Media and its clinically tested accuracy.
For that kind of money, the Fitbit Surge is far superior and has shown higher tested accuracy.
Bottom line, for any wrist-worn product to work, it needs to stay adhered to the wrist (skin contact) and for the most accuracy, needs the same set of sensors used by Body Media, which apparently do not fit in the smaller wrist products.
I can easily wear the Surge around the clock, versus the Hexoskin. There are simply times when I don't want a shirt, especially a compression shirt, so the Hexoskin is perfect for actually workouts, and sleep, if you can tolerate it.
Depends on what you want to track. For me, I test and review products, and in this case, I have always worn the Body Media and Nike Fuelband around the clock... the Fitbit One and Withings trackers when awake... the Withings from time to time to track sleep, especially to compare to the Hexoskin... and the Hexoskin and Nike Sport Watch for training, depending on the type of training.
The Surge offers a watch, GPS and all the other usual fitness wear desired tracking.
The Jawbone UP products offer.... no screen? So, what's the use of a wristband that tracks heart rate full time if you need another device and syncing to check it?!??
No serious fitness training person who wants to track heart rate during training should even be considering the Jawbone products. After all, a faceless wristband hawking full-time heart monitoring is yet further evidence that this is a company with only one objective - making money... not meeting the actual needs of the consumers.