 Todays mobile devices especially smartphones are powerful ways to communicate new information to medical researchers. For this study, researchers at Boston Childrens Hospital are asking people with hepatitis C to make use of their smartphones to help report information about themselves that may improve how hepatitis C is treated. This study uses a free app called C Tracker that can be installed from the Apple App Store onto the participants iPhone. The main goal of this research study is to use this app to report hepatitis C related health information to the researchers who are conducting this study. The investigators will ask participants about their health,activities, medications, and ways in which hepatitis C has impacted you. This information will be reported anonymously, which means that the researchers doing the study wont know who the participants are. 