
Fitbit Air Goes Dual-Role: How to Slip It Into Your Watch Strap
Reddit users discovered a simple hack: the Fitbit Air’s 18mm width lets you thread its band through watch lugs to turn the tracker into a combined watch-and-fitness device. It works with watches that have at least 18mm lug width and may require a larger Performance Loop Band; the sensor can sit under the wrist and still track activity.