An apparatus (a) groups descriptors into a cluster based on associating the descriptors with each of a first item and a second item, (b) accesses biometric data of a user, (c) determines a first activity of the user based on contextual data correlating the cluster with the biometric data, including determining whether the first activity represents an anomalous phase of the user based on a time period of the first activity being shorter than a threshold duration, and (d) generates a user profile based on the first activity of the user and the cluster, including (i) responsive to determining that the first activity represents the anomalous phase of the user, omitting a name of the cluster from the user profile, and (ii) responsive to a second activity of the user matching the first activity associated with the cluster, generating a recommendation including a third item based on the user profile.