H] Subjects must be high risk. High risk is defined as subjects with conditions including, but not limited to: dysplastic nevus syndrome, previous history of melanoma/non-melanoma skin cancer, fair skin, >16 nevi, family history of melanoma, immunosuppressed status I] Subjects must have an iPhone 4S or newer, or an iPad Air 2, iPad Mini 4 or iPad Pro in order to download and use the application and take photographs of high enough quality for the physician to analyze if needed.