Sona is a fashion forward activity tracker with serious sensor tech

Variable heart rate sensing and breathing training takes aim at stress
Sona band packs serious sensors

New York City based smart jewellery company Caeden has unveiled Sona a new connected bracelet a built-in heart rate sensor. The company claims it can measures 10 times more information than a standard HR tracker.

It's designed to look good on your wrist no matter what you are wearing, and features technology to help you learn how to balance life, not just get fit. It is now available for pre-order from the company's website for $199.

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We sat down with Caeden's president and CEO, Nora Levinson, for a demonstration of what makes the smart bracelet so special.

The Sona activity-tracking bracelet is a simple leather band that comes in either black or white, with an elegant clasp, available in gold, rose gold, or gunmetal grey. Under the clasp lies the brain of the device, which includes a three-axis accelerometer and a very fancy heart rate monitor.

The most important feature of the Sona is that it's designed to track the variability between the beats of your ticket, marking the exact timing of each heartbeat. And Levinson says the new metrics make a big difference:

"When you get a level of signal accuracy that high, you are able to do some detailed analysis of your underlying autonomic nervous system," she said.

Levinson went on to explain that we have two different branches in our subconscious nervous system, stress response and rest and calmness response. The heart rate variable sensor can provide a metric that allows its user to monitor overall health and wellbeing, not just steps or calories.

The idea is that the Sona helps to develop a well-balanced lifestyle and manage stress at the same time. It will let you know when you are overworking your body, whether through too much exercise, not enough sleep, or too much stress.

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"If your heart rate variability is higher, that's better. It means you are well rested and don't have a high amount of stress or you are not over-training," Levinson said.

"Whereas, a low heart rate variability means that you aren't sleeping enough, have chronic stress, are working out too vigorously and your body can't recover."

So, the Sona can track your day-to-day wellbeing, but once you know about it, then what? That's where the app comes in. Caeden, in collaboration with a group of scientists, has developed five guided breathing sessions. Breathing programs are based on different needs, like preparing for a meeting, relaxing before bedtime, etc.

The breathing sessions, called Resonance, helps the user control their heart rate patterns by breathing at a specific speed.

"This is a scientifically built program where, you do this pace breathing at your body's resonant frequency to put your heart rate into a sine wave pattern," said Levinson. "Which increases oxygen intake and helps balance the two sides of the autonomic nervous system."

There is a pulsing icon on the centre of the screen that shows when the user should breath in or breath out. This information is based specifically on the person's heart rate variable. It is not a general breathing trainer, which is why the Sona tracker works exclusively with this program.

We tested the Resonance breathing training with the Sona on. It is surprisingly harder than you'd think to pace your breathing with the app's suggestion. However, after just a few minutes, it became easier and our breathing started to sync up with the target pattern.

The Sona does include typical activity tracking information, like a step counter, how many calories you've burned, and distance you've moved. However, Levinson clarified that the focus is on heart rate variable tracking, including during exercise. Since the sensor gathers detailed heart rate information, the type of exercise you are doing doesn't really matter.

It takes into account how your body responds to activity throughout the day. You don't have to let the tracker know that you are starting to exercise. Since it is always monitoring your heart rate, it will automatically note your active time (when you are exercising), whether you are doing Yoga, running, rowing, dancing, or whatever.

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If you don't want to get the classy looking leather band covered in sweat, preorders come with an interchangeable silicone band in black or white so you can switch over to workout wear with a quick change.

In addition to being an activity tracker, the Sona features notification alerts. When you receive a text message or call on your smartphone, you'll get a vibration on your wrist. So, even if your smartphone is in your bag, you won't miss an important communication.

The tech bracelet runs on an 80 mAh rechargeable battery that the company claims can last up to four days with regular use (roughly 20 minutes of Resonance breathing training plus 30 minutes of Active Time monitoring). It connects to a contact-based cable.

Caeden has plans to launch additional straps next spring and will likely look into collaborations with third-party designers for future models. There are also plans to add sleep tracking to the app in the future, which is based on a study being conducted at Duke University that uses heart rate monitoring rather than movement tracking.

Shipping of the Sona is expected in April 2016.


  • ErinM says:

    You should do a follow up on this story - the bracelet is finally available, but many customers are reporting product failures, no response from customer service and fear that Caeden took their money and ran. Take a quick look at their Twitter mentions & Facebook page and you'll find MANY unhappy customers.

  • Anon1234 says:

    Save your money!!!! I preordered this bracelet in May - and still have YET to receive it. I requested a refund given that they are back ordered until November (what, how can you run out when it's been three months since I ordered it?) over two weeks ago which they said would go through in a few days - and STILL NO MONEY! I think these guys are scam artists and wouldn't spend a penny of their products!

  • simongardiner says:

    I was one of the first to purchase the Caeden Sona. It looked good and promised to do great things.

    However, when I got it, everything went downhill quickly.

    The product doesn't work. It struggles to hold a charge, has even more trouble syncing with your phone, and what's more, the movement feedback I was getting, when I could get it, was wildly inaccurate.

    In September I decided enough was enough. It wouldn't hold a charge for a day, and stubbornly refused to sync. After 2 weeks of waiting to hear back from Caeden, I was finally able to arrange to send it back for a refund. I returned it in September. It is now December, and I haven't received my refund and the company refuses to respond to any of my correspondence. They only provide email as a contact option (which is hardly best practice) and don't respond. I think that was a conscious decision on their behalf to provide no phone number.

    I very much doubt, based on my experience, that this company will be in operation much longer. I strongly recommend that you not purchase this, or any device, from this company. They have quality issues and they refuse to respond when anything goes wrong. 

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