Fitbit Air Firmware Update Targets Step and Sleep Tracking Bugs
Google began pushing the first Fitbit Air firmware update today, roughly seven weeks after the tracker went on sale, and the timing is not coincidental. The release follows a sustained wave of user complaints about the device's two most fundamental jobs: counting steps and tracking sleep. The update (version 20001.253.2 on iOS, 67.20001.253.2 on Android) is rolling out gradually via the Google Health app, according to Android Authority.
The key question is whether Google's first Fitbit Air update fixes the tracker's biggest complaints or merely improves features around the edges.
The stakes are unusually high for a first release. The Fitbit Air is a $99 screenless tracker with no display, no buttons, and a vibration motor that exists only for alarms, not phone notifications; a single LED on the side confirms battery level, and that's about it, per Ars Technica's review. Every dollar of its value depends on sensors and software working quietly in the background. When background tracking breaks, there's nothing else to fall back on.
The complaints that made this update necessary
The problems users reported were not minor calibration quirks. One early owner shared on X that roughly an hour of sleep was logged as 422 steps rather than rest, the tracker having mistaken stillness in bed for movement, as Android Authority reported earlier this month.
Step inflation was a separate failure mode. According to the same reporting, one Reddit user described nearly 1,600 steps counted during two hours of sitting at a desk, generated by ordinary wrist movements, and a factory reset made no difference.
Sleep detection errors were severe enough that at least one user called the feature "100% useless." The tracker had logged them as asleep at 11 PM while they were actively using their phone until nearly 1 AM, per Android Authority.
The pattern matters even if the evidence is anecdotal. Several Reddit posts described similarly flawed sleep and activity data, and at least one longtime Fitbit user attributed the degraded accuracy to the transition from the Fitbit app to Google Health, Android Authority noted. One owner reported that wearing the tracker on the ankle rather than the wrist produced far more accurate results for both step counting and heart rate. That detail is telling: it points toward the wrist-detection algorithms as a potential weak point, not a hardware defect.
The implicit acknowledgment that something needed fixing came with the patch itself. The more useful question is what the patch can actually reach.
What the first Fitbit Air update can fix and what remains unclear
The clearest confirmed target on the firmware side is automatic workout detection. Google had already signaled last month that it was working to expand the range of exercises the Air can identify automatically, one of the device's most frequently cited weaknesses, and detection logic lives in the firmware making this patch the right vehicle to address it, Android Authority notes.
The sleep tracking and step count problems are less certain. Google's official changelog says only "bug fixes and general performance improvements," with no confirmation, as of publication, that the update specifically targets sleep-start errors or phantom step counts. Whether those are firmware-level sensor issues, algorithm problems in the app, or some combination has not been clarified publicly.
On the Google Health app side, distinct from the device firmware, Google committed last month to fixing runs mislabeled as generic workouts and to reducing the frequency of AI Health Coach messages triggered by minor activity like short walks, The Verge reported. The run-labeling fix and pace splits were described as rolling out that same week, meaning those app-level changes likely preceded this firmware release.
Google also announced app-level improvements to sleep presentation: a new 24-hour sleep overview that includes naps, and hourly step-goal charts. Useful additions, but cosmetic ones. Users with sleep tracking errors will see better-looking dashboards whether or not the underlying detection problem is resolved.
One practical note on the AI Health Coach: Ars Technica documented the coach inventing workouts from brief heart-rate spikes and extra steps, a hallucination problem that sits in the app's intelligence layer, not the firmware, per that review. Users who find it more distracting than useful can disable it via profile, then Your data in Google Health, then Feature Control, then Google Health Coach. Free-tier users get a more information-dense interface without the AI layer by default, which Ars Technica found is often the more useful experience.
How to check for the update and what to look for after
Open the Google Health app, navigate to the Fitbit Air device settings, and look for a firmware update prompt. The rollout is gradual; not all devices will see it immediately, and availability is expected to expand over the next several days, per Android Authority.
Target version numbers are 20001.253.2 on iOS and 67.20001.253.2 on Android. The numbers look different by platform but carry the same build.
For current owners, the most useful post-update tests map directly to the complaints that drove this release:
- Sleep start and end times: Do they align with when you actually fell asleep and woke up, rather than two hours early?
- Step counts at rest: Sit at a desk for 30 minutes with normal wrist movement and check whether the count is plausible.
- Automatic workout detection: Start a run without manually logging it and check whether the Air catches it and classifies it correctly.
- Workout labels: Check whether recent runs appear as runs in the app, rather than generic "workout" entries a labeling fix Google committed to in its public roadmap.
User reports from these tests will be the first real signal of whether this update moved the needle. The changelog is too vague to say.
What comes next
This update is a necessary first step, not a resolution. Workout detection improvements are Google's most explicit commitment and are plausibly addressed by firmware. Whether the sleep tracking errors and phantom step counts are fixed remains unconfirmed; those may require additional patches depending on where the root cause sits, as Android Authority notes.
Google has at least moved at a reasonable pace. The public Google Health roadmap and this firmware release both arrived within weeks of user complaints becoming visible on social platforms, The Verge reported. For a product in its first two months, that responsiveness is worth something.
For prospective buyers, the hardware itself week-long battery life, heart rate, SpO2, skin temperature, and AFib alerts packed into a $99 screenless puck has been broadly well-reviewed, per the Google launch announcement. Given the limited changelog, those considering a purchase may want to watch early user reports on sleep and step accuracy over the next week before committing. If those two things check out, the value case is strong. If they don't, the Air is still a work in progress with more patches likely on the way.
The Fitbit Air's first firmware update is as much a test of Google's platform credibility as it is a bug fix. Watch user reports over the next seven days; they'll tell you more than the changelog did.
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