Weekly smartphone raffles were tested as an incentive for promoting voluntary medical male circumcision (VMMC) and encouraging VMMC clients to return for follow-up in three regions of Tanzania. This article presents the results of an evaluation of the impact of the raffles on the volume of VMMC clients ages 20 and older. It was published in a supplement to the Journal of Acquired Immune Deficiency Syndromes about interventions to create demand for VMMC.