onceusers
Onceusers is a term used in web analytics to describe visitors who interact with a site or app only once within a specified time window, such as 30 days. It is used to differentiate single-visit engagement from recurring or returning engagement. The term is not standardized across platforms and may be defined differently by analytics providers.
Originating as a shorthand for one-time users, onceusers reflects a focus on session-based counting rather than
Onceusers are identified by unique identifiers tied to devices or cookies. Accurate counting requires persistent identifiers
Analysts may use onceusers to estimate reach or to contrast with returning users for retention analysis, conversion
Related concepts include unique visitors, first-time visitors, and returning visitors. Some sources use one-time visitors or
See also: unique visitors, returning visitors, session, user engagement.