Google Fitbit Air Screenless Activity Tracker (Obsidian)

Google Fitbit Air Screenless Activity Tracker (Obsidian)

By Google Fitbit · Fitness Trackers · Phones & Computers

  • Screenless band design
  • Heart rate, fitness and sleep tracking
  • Personalized AI-powered coaching
  • Up to 7 days battery life
  • Works with iOS and Android

Lowest price seen
~$99.99 (approx.)
from $99.99 at Amazon

Prices are snapshots. Check the current price with the store.

Summary

A screenless wrist tracker that hides every sensor in a 12 g pebble and leaves live stats, GPS and notifications on your phone. Check your battery expectations before you buy: owners report anywhere from 3 to 9 days against Google’s 7-day rating.

Strengths

  • Reviewers keep forgetting they are wearing it; Which?’s lab gave it top comfort marks.
  • Step counting is the strongest metric: 1.66% walking error in Which?’s lab, 3,993 steps on a hand-counted 4,000-step walk.
  • Heart rate accuracy sits well ahead of the category: 1.34% overall error against a 5.7% fitness-tracker average.
  • Battery outlasts its rating in testing: 199 hours in Which?’s lab, 8 days at CNET, 8+ days at PCMag.
  • Core tracking needs no subscription, and three months of Google Health Premium are included.
  • The Google Health Coach is the most capable AI fitness planner multiple reviewers have used.

Weaknesses

  • No screen means no live workout stats, no Reminder to Move and no route data when your phone loses signal.
  • GPS is phone-dependent, so distance is step-derived: Which? measured 10.80% distance error against 2.98% for GPS smartwatches.
  • Automatic workout detection covers a fixed list of activities, needs 15 consecutive minutes and can start 10-20 minutes late.
  • Calorie estimates are the weakest output: ZDNET measured them 11.9% low on a treadmill and 30.9% low in strength training.
  • Battery reports split between 7-9 days and 4 days or fewer, with gym heart-rate sharing and frequent manual syncs named as drains.
  • Early software bugs included sleep scores that would not calculate and workouts that paused randomly.

Verified specifications

ModelGoogle Fitbit Air, US model GA09509-US, Obsidian colorway.
Displaynone; a single status LED, and double-tapping the pebble shows battery state.
Sensorsoptical heart rate, 3-axis accelerometer and gyroscope, red/infrared SpO2, device temperature for skin temperature variation, vibration motor.
Metrics24/7 heart rate, resting HR, HRV, AFib notifications, SpO2, breathing rate, steps, distance, calories, Active Zone Minutes, Cardio Load, Daily Readiness Score, sleep stages and naps.
ConnectivityBluetooth 5.0; sync needs Bluetooth LE, internet and location permission, range up to 30 ft.
Batterylithium-polymer, rated up to 7 days; 0-100% in 90 minutes, and 5 minutes of charging equals about a day.
Water resistance50 m.
Memory7 days of minute-by-minute motion data and 30 days of daily totals, heart rate at 2-second intervals.
Onboard GPSnone; GPS and elevation come from the paired phone.
AppGoogle Health app and Google account required; Android 11.0+ or iOS 16.4+.
Chargerproprietary pill-shaped magnetic USB-C cable in the box; no wall adapter.
In the boxtracker, wristband, USB-C charging cable.
Dimensions1.4 × 0.7 × 0.3 in (34.9 × 17 × 8.3 mm) for the sensor pebble; 5.2 g without the band, 12 g with it.
Bandtextile micro-adjustable Performance Loop with stainless steel buckle, one size fitting 130-210 mm wrists.
Housingrecycled polycarbonate and PBT plastics; packaging is 100% plastic-free.
Warrantyone year from purchase in the US, two years in the EEA, 90 days for certified refurbished units.
Full research notes and sources

Heart rate, steps and distance

Which?’s controlled lab testing measured 1.34% overall heart-rate error against category averages of 5.7% for fitness trackers and 3.85% for smartwatches, 2.35% error while running, 0.83% resting-HR error and 1.66% walking step error. CNET’s two-week test counted 2,457 steps against 2,500 by hand (0.3% error) and saw average heart rate within 3 bpm of a Polar H10 chest strap, though it read 168 bpm against the strap’s 180 bpm at peak sprint. PCMag measured heart rate within 1-2 bpm of an Apple Watch Ultra 3 across walks, a 30-minute run and two HIIT sessions, and Tom’s Guide’s hand-counted 4,000-step walk produced 3,993 steps on the Air against 3,985 on a Pixel Watch 4.

ZDNET’s chest-strap comparison shows where the numbers bend: average heart rate was within 1-2 bpm at steady pace, but the tracker lagged at transitions and missed strength-training peaks by 17 bpm, and it under-read calories by 11.9% on a treadmill session and 30.9% during strength work. Reddit owners separately report heart rate “off by a lot during exercise” and resting HR reading high, while Android Authority cautions that some complainants appear to use older Fitbit devices rather than the Air.

The screen shapes everything else. There is no GPS, so daily distance is derived from steps: Which? measured 10.80% distance error against 2.98% for GPS smartwatches, and a phone-signal loss on a hike gave CNET no route, distance or elevation. Automatic workout detection covers a fixed list of activities, needs 15 consecutive minutes, and can start 10-20 minutes late. There is no ECG, which the Charge 6 has, and no Reminder to Move even though the hardware can vibrate. Skin temperature variation sits in its own app section and never feeds cycle-tracking predictions.

Battery life and charging

Google rates the battery at up to 7 days, based on 2025 testing of pre-production hardware with a median usage profile. Which?’s lab measured 199 hours (about 8.3 days), CNET saw 8 days and PCMag 8+ days, with a full charge in 1 hour 2 minutes and 30 minutes restoring 67%; a 2 km run drained 0%.

The community evidence is less tidy. Google’s own support forum hosts threads titled “Fitbit Air Battery Life Only Lasting 4 to 5 Days” and “Fitbit Air battery life”, and r/FitbitAir shows the same split: owners reporting 3-5 days against others claiming 7-9 days. Heart-rate sharing to gym equipment and frequent manual syncs are the drains people name. Nobody has published a failure rate, so treat the short-battery reports as real variance rather than a defect.

Software, app and subscription

The Google Health app and a Google account are required, and the Gemini-based Health Coach is the most capable AI fitness planner multiple reviewers have used: PCMag logged a photo of pretzels and read a personal trainer’s handwriting off a whiteboard. WIRED notes the app handled missing data honestly — when the band slipped off overnight it reported a poor sleep score and declined to fabricate a corrected one. Which? is the dissenting voice, finding the coach merely restated data after a bad night’s sleep.

Early adopters filed software bugs: a Reddit owner three days in described sleep scores refusing to calculate, blank sleep screens needing an app force-restart, no automatic activity or nap detection, and app-started workouts randomly pausing — a 10-minute run recorded 17 seconds, a 1-hour strength session stopped at 37 minutes. Nobody has reported whether those June 2026 bugs are fixed in current firmware.

Core tracking never requires a plan. Google Health Premium adds the coach, detailed sleep analysis and adaptive plans at $9.99 a month or $99.99 a year, with three months included at purchase. Swappable bands cost $34.99 for the Active and $49.99 for the Elevated Modern, and the Stephen Curry edition is $129.99. The tracker is sealed, with no user-replaceable parts and no battery service path, and the charger is proprietary — WIRED advises buying a spare.

Is it worth it?

At $99.99 from the Google Store or Best Buy, this is the cheapest credible entry into screenless tracking. PCMag’s comparison points put Whoop 5.0 at $239 a year, the Polar Loop at $199.99 and the Oura Ring 4 at $349 plus a $69.99 a year subscription. If you want sleep, steps and heart rate without a notification firehose and do not need live workout stats, the value case is clear at list. Above roughly $110 the calculus changes, since a discounted Charge 6 or Inspire 3 adds a screen, workout features and ECG for not much more. The subscription decision matters more than the band price: Which? found it hard to justify when the coach only restates data, while PCMag’s reviewer calls that same coach the most capable AI planner he has tested — a taste question, so trial the included three months before paying.

The one-year US warranty covers defects but not accidental damage or cosmetic wear such as scratches and dents, and claims for devices bought on or after July 11, 2023 go through the Google Hardware Warranty Center. On a first-gen product with no ownership history, the retailer’s return window matters as much as the warranty.

Which model this is

This page covers the Google Fitbit Air, US model GA09509-US, in the Obsidian colorway (Obsidian band, matte black stainless steel buckle). The Obsidian listing is ASIN B0GTMTZF3V. Non-US SKUs such as GA09509EU are distinct regional models. Do not merge it with the Fitbit Charge 6, Inspire 3 or Luxe, the discontinued Fitbit Flex, or the Aria Air smart scale, a different product sharing the “Air” name.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Stores:

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