| userID |
User identifier; assigned gmail account |
| activity_fragment |
HeartSteps app page in use: JAWBONE_FRAG = home page (1st page), MESSAGES_FRAG = message history page (2nd page), PROFILE_FRAG = profile page (3rd page), SETTINGS_FRAG = settings page (4th page) |
| start_time |
Date-time string (yyyy-MM-dd HH:mm:ss) for the time at which the user started viewing the page indicated in activity_fragment |
| end_time |
Date-time (yyyy-MM-dd HH:mm:ss) for the time at which the user finished viewing the page indicated in activity_fragment |