Happiness Machine 4.0: ài is a conceptual app design that seeks a change of the daily behavior for the people living in the China urban through persuasive design strategy. With built-in artificial intelligence, the cellphone is able to detect and understand user's emotion, and then analyze user's mood data. It has the ability to inspire and boost self-confidence by tracking the user daily schedules and smart encouraging functions.

The next step is to influence and convince the user's attitude towards happiness through persuasive activities, which includes the emotion virtual plant and good deed logbook. The final aim of our design is to motivate them to achieve a deeper and sustainable happiness.