Most peoples moods are more complicated than a simple emoji. There is a lot going on inside your head and this app has been designed to help you record whats on your mind in an abstract way. Along with the mood activity, you can record an overall description, location information, pain and stress levels. The data captured is only ever stored on your device and never shared. If you want you can even lock the app down with Touch/Face Id. In future releases I hope to be able to provide you with a summary of this information, in order to try and identify trends.