<qa>  What is the main goal of this research study?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. 