Reminderz is a comprehensive mobile application designed to fulfill two goal: engage and retain patients in clinical trials andcollect data for the CRO (Clinical Research Organization). The features on the Reminderz app are designed to enhance the participant experience. We achieve this by creating simple to use tools so that participants can easily enrich their trial experience. These tools include the following: the ability to connect with others in the study, education and search about trials, and the ability to schedule their appointments. Most importantly, participants have a daily check in. There is a built in alert mechanism that informs their supports that CRO designee attention is warranted via push and email notification. This is empowering and validating and indicates a high level of importance as a participant and as a person.