The Fitbit Air is a good wearable weighed down by a chatty AI “coach”

Smartwatches can track your health stats, but they also do a lot of other things you might not always want or need. The $100 Fitbit Air tracker ditches the screens that have become common on people’s wrists, leaving behind a tiny puck of health sensors you can often forget you’re wearing. You will not, however, forget that Google’s new health platform is built around AI.

The Air has no speaker, and there’s only one LED on the side to indicate battery level. You can double-tap the tracker to check the level, and that’s about the end of on-device features. The vibration motor is only for alarms—it can’t sync with notifications on your phone. That makes sense, given there is no screen to tell you what that buzz was all about.

The Fitbit Air doesn’t have a display or buttons—just a small LED on the side for battery status.

Credit: Ryan Whitwam

The stock Performance Band is simple, consisting of a smooth polyester yarn with small velcro pads and a metal loop. It’s durable but does seem to absorb a bit of moisture. For swimming or heavy workouts, you’ll probably want the silicone active band. This one hides the Air puck a bit more effectively, and it looks good in a sporty way.

While $35 for a bit of silicone is rather spendy, that’s nothing compared to the $50 Elevated band, which is a more understated polyurethane option. However, it doesn’t make sense to pay half the cost of the tracker just for a band that looks marginally better.

The Active Band hides the Air puck a bit better.

The Active Band hides the Air puck a bit better.

The stock Performance Band is made from polyester and a dash of elastic.

Ryan Whitwam

The stock Performance Band is made from polyester and a dash of elastic. Ryan Whitwam

The Fitbit Air mounts inside the stock bands.

Ryan Whitwam

The Fitbit Air mounts inside the stock bands. Ryan Whitwam

The stock Performance Band is made from polyester and a dash of elastic. Ryan Whitwam

The Fitbit Air mounts inside the stock bands. Ryan Whitwam

Third-party bands for the Pixel Watches have been mediocre and rare despite Google’s Apple-like commitment to its proprietary connector over the past four generations. The Fitbit Air is much simpler. The device just has to snap into a loop or frame to stay put. I’m hopeful that more band options will become available in the future because Google’s options are far too expensive.

Unlike the simplistic fitness trackers of the past, the Fitbit Air has most of the sensors you’d find in a high-end smartwatch. It tracks your steps (obviously), heart rate, blood oxygen, and skin temperature—no ECG, though. These stats and their history are available in the app, but they also feed into various secondary metrics and evaluations like your “readiness score” and sleep phases.

The Fitbit Air itself is a small puck barely larger than the sensor cluster.

Credit: Ryan Whitwam

There’s not really anything else to say about the device itself—the minimalism is one of its main selling points. You’ll barely notice the Air on your wrist, so it’s easy to wear all the time, and I can confirm it lasts a full week on a charge. Even fussy sleepers should have no problem wearing the Fitbit Air all night.

The Air also uses its array of sensors to detect workouts, and it logs everything in the new Google Health app. Unfortunately, fitness buffs may find themselves too dependent on the app. You’ll have to go to the app for live stats during a workout because there’s no screen on the Air.

The Active Band is ideal for heavy workouts, but it costs another $35.

Credit: Ryan Whitwam

The revamped app is decent and has most of the features you’d expect. If you’re a new user or someone who doesn’t spend much time nerding out over Fitbit data, you’ll probably be happy with the data logging and features. For long-time Fitbit users, the loss of features like blood pressure tracking or custom meal creation will be irksome. It’s also missing some basic layout customization options. Google says updates are on the way to address some of these concerns, though.

The Fitbit Air snaps easily into the bands.

Credit: Ryan Whitwam

The quality of data seems good to me, a mostly casual Fitbit user. Sleep tracking accurately detects my perceived timing, and the smart alarm works great. The readiness score often is a reliable predictor of how “good” I felt on a given day, too. I’ve been skeptical of the extreme datafication of health enabled by wearables, but Google does seem to be making progress.

Your friend the coach

The Fitbit Air is a good fitness tracker, but Google’s new health AI has ramifications beyond this one wearable. If you’re a premium user, Google Health (which replaces Fitbit) includes the AI-powered Health Coach, and you won’t forget it’s available. The Air comes with three months of Premium, so this is the default experience. This AI model is woven through the app, presenting you with summaries, suggestions, and words of affirmation, whether you want them or not.

In some ways, Health Coach is a good application for generative AI. The Gemini-based model running the show is not a generalist—it was tuned specifically for this one task, and it’s grounded by the data your wearable collects. The Coach offers basic rundowns of your health and physical activities based on the metrics it tracks.

But no amount of health-focused tuning will change the fundamental issues with generative AI. I’ve encountered a few minor hallucinations, mostly related to inventing workouts that didn’t happen based on some extra steps or a brief increase in heart rate. It also just misses things sometimes, claiming that a particular piece of data doesn’t exist when it’s plainly visible in another tab.

Health Coach goes on at length about anything and everything, but at least it cites its sources.

Credit: Ryan Whitwam

Like all of Google’s chatbots, you can tell the coach you want it to behave differently or provide it with background information. For example, the coach might suggest ways to eliminate awakenings after a night of spotty sleep, but maybe you’ve got a young child to feed or a dog that insists on going out at 5 am every day. Adding this information to the token shuffle produces more accurate summaries.

At one point, I told Coach I would be traveling, and it factored that in when generating “Proactive insights,” as Google likes to call them. It knew when to take my schedule changes into account for its analysis of my data and when to stop. It follows instructions very well, in AI prompting parlance.

But do you need an AI summarizing your health data? If you’re not doing a lot of focused training with specific goals and tedious manual food tracking, the insights amount to: “Make sure to rest after a big workout. Maybe go for a light walk or something.”

Thanks, robot.

Part of the problem may be that Health Coach is primed to be your pal, and it always has something to say. Gemini is tuned, to some degree, to produce outputs that users “like,” sometimes called vibemarking. You get a lot of grandiose, somewhat cringey praise when you hit a goal and a spirited pep talk when you don’t. It’s always there, always talking.

You don’t necessarily want a virtual health coach that yells at you, but Health Coach could be a bit more straightforward and less wordy—the summaries of workouts, sleep, and simply existing take up a ton of space in the app. And for what? “Maybe go for a light walk or something, I don’t know,” it says again, but in far too many words.