'Give Up Smoking!' is a freeware 'tamagotchi style' application designed for java enabled mobile phones. The main purpose of the application is to help people trying to quit smoking to achieve the goal. The application encourages the user to gain successive body purification levels allowing browsing statistics, providing visualizations and descriptions of positive changes that have occurred in the body since quitting smoking. The progress of body purification process is calculated every minute basing on data provided by user (start date, average number of cigarettes smoked daily and cigarette pack price).