Hi, everyone. I am Weisi Luo. My Capstone project concept is "No-touch" experience-based handwashing habit-forming. In 2020, people around the world are facing unprecedented coronavirus threats. What a concerned issue under serious COVID-19 circumstance is that people forget washing hands after back home. Accordingly, based on habit-forming loop system (cue, routine and reward) using acoustic and visual effect, “PURITY” is a setting reminder application and an inductive hand sanitizer to help people build a handwashing habit.