A measuring device and method is for enabling a user to measure and record changes in emotion during the day and translate it into a relative stress value per day. It may be used to accumulate the positive and negative emotional reactions that a user experiences during a predetermined time period. This method and device will provide a record of the associated distress and eustress and the cumulative effect therefrom on the individual. The user has a visual display of whether or not the emotions felt during a given day are positive or negative. The recognition of the stress level may remind or enable the user to take some action that will counterbalance excessive negative emotions known to contribute to major diseases and engage in activities that reduce or relieve the stress influences on the user before the end of each day.