NUMBER OF SUBJECTS / LENGTH OF PARTICIPATION
Approximately 500,000 participants may participate in this study. Your participation in this study will last until approximately January 31, 2019, but data gathered from you in this study will be used and analyzed for a longer period of time. The Apple Heart Study App will continue collecting data from you until January 31, 2019, unless you withdraw from the study or you delete the Apple Heart Study App. Data already collected from you will continue to be analyzed after your participation ends or if you withdraw from the study. If you delete the Apple Heart Study App, you will not be withdrawn from the study.