Most tracker apps have a setting you can apply that indicates which wrist you’re wearing it on, your dominant or your non-dominant hand. This is mostly so that

Most tracker apps have a setting you can apply that indicates which wrist you’re wearing it on, your dominant or your non-dominant hand. This is mostly so that the steps algorithm can adjust (somewhat imperfectly) for how your dominant hand sees a lot more motion throughout the day. As such a couple questions are interesting here: 1) are you using that setting, and is it set correctly? 2) are you by any chance ambidextrous? Regarding accuracy in general, a quick scan of the abstract didn’t comment on it, just noting that people who wear trackers tend to be more active and have the health benefits associated with that. In general, step tracking at the wrists is actually fairly difficult and many activities both interfere with recognizing steps (walking a stroller is a big one) or register as steps despite not having taken any (washing the dishes will get you a lot of steps). There’s a reason Fitbit has allowed for wearing a tracker on your hip for many years. You can also enable step tracking on your phone, and it will be quite accurate as long as your phone is in a hip pocket. All of that said, the latest research on the subject shows that you’re best off being active, where activity is defined as 150 minutes per week of heart-rate elevating activity, whether that’s walking or something else. There’s also a strong effect for walking immediately after a meal that has some separate benefit with respect to regulating blood sugar. If you can combine the two, even better.