Fig. 3
User engagement with the MyHeart Counts app from date of release (March 2015) to date of study completion (October 28, 2015). (a) Distribution of user participation by number of days they remained in the study. Number of days of core motion data is indicated in cyan; number of days of HealthKit data is indicated in orange; number of days with 6-Minute Walk Test data is indicated in purple; number of days with survey response is indicated in magenta. (b) Number of users who provided app data on each day during the study duration from March 2015 - October 2015. Core Motion data is indicated in cyan; HealthKit data is indicated in orange; 6-Minute Walk Test data is indicated in purple; survey responses are indicated in magenta. (c) Distribution of user participation by number of days they remained in the study. (d) Number of survey responses on each day during the study duration.
