The Halo is one quirky wearable. But its biofeedback can help your relationships … up to a certain point.

AMAZON’S NEW HEALTH tracker, the Halo, is a small, display-free device fitted into a fabric band that you wear on your wrist. Unlike many fitness trackers that simply count your steps, the Halo collects additional health data that is shockingly intimate. Most notably, the app analyzes pictures of you in your undies to measure your body fat percentage. Also, the Halo’s microphone records snippets of your conversations to interpret the emotions conveyed in the tone of your speaking voice.

I’ve worn the Halo for a month, and it lacks a lot of features I’d want in a fitness tracker, like GPS for tracking your runs. In fact, I’ve also found that most of the data the Halo does analyze don’t seem worth the hassle of collecting it. I’m not sure it’s a great idea for any company, let alone Amazon, to normalize the process of full-body strip-down scans for its customers.

I’m not the only one who thinks so; the requests for underwear photos and the on-device mic have raised many privacy concerns. Despite these complaints, the Halo’s voice-tone tracking feature intrigued me. I wore the wristband through a stressful pandemic holiday with two small children. After two weeks with my nuclear family in the claustrophobic confines of our home without childcare help, parties, or any rest, the Halo began registering voice tones it flagged as increasingly irritable. It made me wonder … if I actually am getting irritable, what the heck am I supposed to do with this data? I decided to find out.

Your Wrist Is Listening
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The Halo assesses your emotional state with a small microphone on the side that you can turn on or off. You teach it to recognize your voice by reading prepared phrases, and throughout the day it records small snippets of conversation and rates them for their “positivity” and “energy.”

These emotions manifest in the app as four different emoji-like faces: A laughing yellow, a smiling green, a weary purple, and an angry red. The app saves notable moments throughout the day, telling you how you felt at different times: irritable at breakfast, amused at dinner, or content in the hour before bedtime.

You can also force it to monitor you during important conversations by holding the button on the side of the Halo. Or, open the mobile app and press the Live tab to watch it monitor your tone of voice in real-time. In my household, at least, there is no better way of dispelling marital conflict than by saying, “Let’s have a heavy conversation so I can monitor it with this app.” I tried it a few times, but my husband and I ended up just crouching over my phone, talking in funny voices to see how the app would register our vocalizations.

In fact, the Halo was rarely able to recognize when I was mad at all. One possibility that Ty Tashiro, who holds a Ph.D. in psychology and is the author of The Science of Happily Ever After, brought up over the phone was that I may express my feelings in gesticulations or other nonverbal communication, and not in the tone of my voice.

If you start from the (perhaps generous) assumption that the Halo’s emotional data is accurate, it’s missing a lot of contexts—specifically, those nonverbal cues and behavior traits unique to each individual. “Only you know the receiver and the sender and how they’re interpreting all those variables—content, context, nonverbals, as well as tone—to say, ‘Oh, my wife is being sweet in a sarcastic way’, or ‘She’s irritated and using a sweet voice,’” Tashiro says.

The Halo’s emotional rating system of colored smiley faces is not without precedent. They bear a resemblance to the work of renowned therapist John Gottman, who observed couples and developed a coding system to rate their positive or negative behaviors with each other.

But Gottman’s research goes a lot deeper than the Halo. It examines real-time interactions between the couple and includes facial expressions and gestures in addition to the tone of voice. In fact, of the five positive behaviors and 10 negative behaviors that Gottman measures, some of the most telling negative ones are silence and withdrawal (what Gottman calls “stonewalling”). If two Halos could work in tandem, measuring real-time discrepancies between the volume, tone, and pace of two people to indicate bad interactions, there might be a lot of interesting possibilities. But they cannot.

Tashiro also made an important point: If the Halo is providing too much negative feedback, it might cause you to avoid bringing up important issues in conversation. “Just because you get dinged that your tone is irritable or angry doesn’t mean you should stop,” he says. “Maybe your partner is being a jerk. As [social psychologist] Dr. Ellen Berscheid would say, sometimes communication isn’t the problem. The problem is that the partner doesn’t like what they hear.”

Objectivity Is Not Reality
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To help interpret the data it collects on the tone of my voice, Amazon’s app partners with outside organizations to create labs, which are small exercises meant to increase mindfulness in the wearer. In one lab, I had to ask myself the nonsensical phrase “What is listening?” before I talked to anyone each day, to become a more “conscious listener.” I found these sorts of exercises unhelpful when it came to interpreting my own data, so I turned to marriage therapist Terry Real.

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