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The Google Fitbit Air gets the basics right, but its AI coach still has work to do.
Google launched the Fitbit Air in May 2026 for $99 and positions it as a screenless alternative to Whoop and Oura, with no mandatory subscription. I was one of the very first buyers of this device. And after a month of daily wear, I can say it is one of the most thoughtful fitness trackers I have tested at this price. It is not without frustration, though.
Design and Comfort
The first thing that struck me out of the box was just how small and lightweight this thing feels. Fitbit Air weighs just 12 grams with the band, while the pebble alone weighs just 5.2 grams. You can compare it with the weight of two paper clips. It feels like it disappears from my wrist within minutes of putting it on, which matters a lot for a device you are supposed to wear around the clock.
The default Performance Loop band is the clear winner among the three available options. It is lightweight, comfortable enough for sleep, easy to clean, and quick to dry. The optional Elevated band looks dressier but feels restrictive, and the hook mechanism is finicky for me. Most people can stick with the band that comes in the box and save their money.
One small but genuinely annoying design oversight is the lack of a physical guide to prevent you from inserting the band in the wrong orientation. I had to check the battery light through the cutout to make sure I was wearing it correctly.
Sleep Tracking
This is where the Fitbit Air earns its keep. The band is small enough to wear overnight without a second thought, and sleep tracking is one of its best use cases. The device tracks sleep stages, blood oxygen, and skin temperature fluctuations.
I woke up with a sleep score and a readable stage breakdown every morning for the last 30 days I’ve been using it. In my testing, the resting heart rate was usually within 3 bpm of the Oura Ring, and both devices tracked HRV changes similarly.
Battery Life
Google claims 7 days of battery life per charge for the Fitbit Air. In the first week of testing, with about a dozen workouts logged, it still had around 15% charge left. A five-minute top-up provides enough power for a full day, while a full recharge takes about 90 minutes. The only drawback is that you have to take it off to charge, which creates gaps in your sleep and recovery tracking.
Workout Tracking
During my training, automatic workout detection worked well for runs and walks, although it sometimes took a little longer to detect other activities. Heart rate tracking during workouts was generally good, but I noticed occasional inconsistencies during intense sessions. There is no onboard GPS either, so the Fitbit Air relies on your paired phone for outdoor route and distance tracking. For serious training, that is a real limitation.
Google Health App and AI Coach
The Google Health app is smart and modern, but learning to use it takes time. A lot of data and graphs are hidden behind several menus, and you will need to spend time learning where to find the most useful information.
The AI Health Coach, available through the Google Health Premium subscription at $10 per month, is the most disappointing part of this package. I caught it hallucinating activities I had not performed, suggesting recovery advice based on a 5.2-mile run that never happened.
The core metrics, including sleep, heart rate, daily steps, and health monitoring, are available completely free. The subscription is optional, and the base price feels fair for what the hardware delivers. Compared to Whoop, which requires a subscription to use the device, the Fitbit Air is a far less risky purchase.
Other users have seen this as well. The sensor collects accurate data, but the Coach often restates those numbers rather than providing actionable guidance. The hardware deserves better software around it.
Who Should Buy It
The Fitbit Air is a strong device if you want a lightweight, low-distraction health tracker primarily for sleep and recovery monitoring. It is not made for marathon runners or data-obsessed athletes, and it is not a smartwatch replacement either.
If passive health data, silent alarms, and a week-long battery life sound appealing, the Fitbit Air is your safe buy at $99. But if you are counting on the AI coach to drive your fitness decisions, or if you need live workout stats on your wrist, look elsewhere.
