Using metrics relevant to general wellbeing, Yadoin prompts you several times a day for a quick input on how you are feeling.
Over time you collect data that will enable you to spot patterns and deviations in i.e. your general happiness and link them to events or other external factors.
The statistics part of the app is your window into historic wellbeing etc., which allows you to see what effects you in a positive way and what does the opposite.
Notifications can be set to match your preferences.