Your Smart Distance is Arccos’ estimation of your expected distance on a well-struck shot. Based on your historical data, it excludes mishits, and abnormally long shots giving you a much better picture of your true club distances.
The Smart Distance metric eliminates the need to manually curate your shots, as Arccos will automatically do it for you, however, iOS users may turn Smart Distance off in the settings page. Doing this will show club averages on the clubs page where you can manually include or exclude shots.
Your Smart Range is Arccos’ estimation of your expected range on well-struck shots. A narrower range is indicative of more consistent shot performance.