Google’s Fitbit Air can log workouts without a screen, thanks to automatic activity detection. The band monitors heart rate, steps and cardio load, then creates a workout entry that appears in the Google Health app. Users can later confirm, edit or delete the record, since the tracker can’t start a session manually.

Behind the scenes, the Air’s algorithm adapts to repeated use, favoring the activity categories you track most. Google advertises support for 150 activity types, and the app lets you set minimum durations to filter out short bouts, such as ignoring a 15‑minute walk by requiring a 20‑minute threshold. Calibration improves accuracy after a few manually logged sessions.

Battery life stretches roughly a week, making the Air a low‑maintenance companion for casual exercisers who prefer a screenless design. Automatic detection eliminates the need to pull out a phone for every workout, but occasional tweaks in the Health app remain necessary for reliable records. Overall, the Fitbit Air delivers hands‑free tracking that aligns with Google’s push toward passive health monitoring.

Because the device syncs only through the companion app, it reinforces Google’s strategy of consolidating fitness data under a single ecosystem.