The TOGETHERCare™ app is a tool for a clinical trial participant's primary informal caregiver. Informal caregivers are vital sources of safety information and heavily influence whether patients remain in clinical trials. These informal caregivers are a wealth of information regarding symptom development which can ultimately lead to adverse events and trial drop out. The TOGETHERCare™ app provides resources for the clinical trial participant's primary informal caregiver, as well as collects data from informal caregiver to inform the conduct of the clinical trial.