This application is designed for the house-using air purifier. The user can control the fan speed, mode, and temperature on the app. Meanwhile, the indoor air quality will also appear on the phone. This app is also suitable for the people has a stable schedule which allows user to set the schedule in advance even they are not home to ensure safe air quality. After using the air purifier, the app will collect and analyze data and offer advice for the user to keep the air clean and save energy as well.