The trend in fitness wearables is increasingly moving towards minimalism.
Instead of glowing displays and constant smartphone notifications on the wrist, more and more people are opting for simple bands that quietly track health data in the background.
Now, Google has launched its first screenless fitness tracker, the Fitbit Air, entering a growing market for minimalist wearables and taking on established rivals such as Whoop.
Design and comfort: An understated companion
Visually, the new wearable is hard to beat for simplicity. The slim casing carries only a discreet letter "G" as a brand logo and looks more like a subtle fashion accessory than a piece of technology. The device itself weighs just 5 grams. With a choice of fabric and silicone bands that can be adjusted steplessly via a simple velcro fastening, it sits securely even on narrow wrists.
Thanks to its low weight, the waterproof band is barely noticeable during intense gym workouts or overnight sleep tracking. The sensor unit can be released from its housing with a gentle press, making it easy to swap bands — including a special water-resistant limited edition created in collaboration with basketball star Stephen Curry. One minor drawback: the plastic casing scratches relatively easily, though it is fortunately protected to some extent by the slightly protruding fabric band.
Inside the small casing, there is some surprisingly accurate hardware. In addition to acceleration and skin temperature, the band also measures blood oxygen saturation and heart rate, which is monitored continuously at short intervals.
The readings recorded in our test were accurate and, even during sports involving vigorous arm movements, came close to the precision of a professional chest strap. The device can also alert users to atrial fibrillation and can be used via Bluetooth as an external heart rate sensor for compatible fitness equipment.
Precise during workouts — but with limitations
There are drawbacks, however. Anyone wanting to track their route while running or cycling will need to carry their smartphone, as the Fitbit Air has no built-in GPS. Swimming tracking is also rudimentary, logging only the duration of a session. There is no ECG function either, meaning you can't check for heart arrhythmia problems.
On the other hand, automatic workout detection works excellently once the user has been active for more than 15 minutes continuously. One small detail: the step counter will occasionally misread a vigorous wave of your hand as a step - even while seated.
At night, the band collects data on sleep phases, heart rate variability and overall sleep quality, which are summarised each morning in a clear daily readiness score.
Sleep phase detection operates at an extremely high level, with the system only occasionally struggling to accurately capture brief periods of waking during the night.
A genuine highlight is the built-in smart alarm. Working with a 30-minute time frame when you'd like to be woken up, the alarm wakes the wearer with a gentle wrist vibration during a light sleep phase. A firm double-tap on the band is all it takes to dismiss the alarm.
With no power-hungry display, the device delivers impressive battery life. A full charge comfortably lasts at least one week, and up to 15 days with conservative use. A discreet LED on the side briefly lights up after a double-tap to indicate the current charge level.
Should the battery run low, just five minutes on the magnetic charging cable is enough to top it up for a full day. A full charge takes around 90 minutes. Fully wireless charging directly on the wrist, as offered by Whoop, is not available here.
No extra costs, no subscription fees
Perhaps the biggest advantage over the competition lies in the pricing model. While some rival devices in this class require steep annual subscription fees to remain functional, the Fitbit Air costs a one-off fee of around €100 or $100 and can be used with its core features at no further cost.
This is different with the rival Whoop band, which costs €199 or $199 - around twice as much - every year on a subscription basis.
All key data — including steps, calories burned, sleep phases and the daily readiness score — feed into a clear, easy-to-understand health app. The Google Health app is available not only for Android smartphones but also for Apple's iOS platform, putting the Fitbit Air in direct competition with Apple Watch models as a fitness tracker.
Google does have its own subscription offer too, however, and anyone willing to pay €10 or $10 a month can get access to workout videos, unlimited data storage and an AI-based health coach.
This chatbot, based on modern language models, can draw up individual training plans, answer questions about personal health and offer tailored everyday tips based on collected body data. For most everyday users, however, the free basic version should be more than sufficient.
A handy fitness tracker with the essentials
With the Fitbit Air, Google has built an extremely useful fitness tracker that focuses on the essentials. The highly discreet design, very precise heart rate sensors and strong battery life make it an excellent everyday companion.
The depth of analytical data may fall slightly short for professional athletes, but the absence of a mandatory subscription for basic health data is a major plus.
For anyone who wants to track their vitals without wearing a bulky smartwatch, this is an unobtrusive and above all affordable alternative.
