Activity tracking device and associated display

A non-transitory computer readable medium containing instructions for controlling a display device by:

• receiving activity data from a sensor device;
• processing the activity data for use in association with a-only one closed loop circular axis extending over a 24 hour time period;
• displaying a first arc in association with the only one closed loop circular axis, the first arc configured to display activity data therein;
• displaying a second arc in association with the only one closed loop circular axis, the second arc such that at least a portion thereof is concentric to the first arc;
• wherein a circumference of a circle which would be formed by the first arc is representative of awake data for a current 24 hour period;
• wherein a portion of a circumference of a circle which would be formed by the second arc is representative of a previous 24 hour period in which a sleep activity began, and a remaining portion of the circumference of the circle which would be formed by the second arc is representative of the current 24 hour period;
• and
• wherein the second arc is configured to represent the sleep activity which began in the previous 24 hour period and continued into the current 24 hour period, the second arc configured to overlap the first arc at one or more points on the closed loop circular axis such that both the awake data and the sleep data are associated with the one or more points on the only one closed loop circular axis.

A method of providing activity data to a user, the method comprising:

• receiving activity data from a sensor device carried by a user;
• processing the activity data for use in association with a closed loop circular axis;
• displaying the activity data in association with the closed loop circular axis on a first portion of a display screen, the closed loop circular axis being the only closed loop circular axis displayed on the display screen, the activity data including sleep data on one side of the closed loop circular axis and awake data on an opposite side of the closed loop circular axis, the sleep data including a start time and an end time for a daily retired sleep period, the end time occurring in a selected day and the start time occurring in a previous day, the awake data configured to overlap the sleep data on the closed loop circular axis when the user remained awake at a time during the selected day that is later than the start time of the daily retired sleep period from the previous day;
• and
• displaying on a second portion of the display screen a calendar, the calendar providing for each day of a displayed month an indicator of at least one aspect of the sleep data.