空氣品質PM2.5 is a free Android app developed by Antyi. It falls under the lifestyle category with a specific focus on weather. The app provides users with three main modes: List Mode, Map Mode, and My Favorites. It syncs with the Environmental Protection Agency's data every hour, so a stable internet connection is required to use this app.

In List Mode, users can filter and view pollution levels and switch between AQI (Air Quality Index) and PM2.5 displays. It also allows users to access detailed information on other pollutants such as O3 and CO.

Map Mode allows users to enable location services and check the current air quality index of their location. By long-pressing on the information window, users can add or remove locations from their favorites list and switch between AQI and PM2.5 displays.

The My Favorites mode allows users to quickly access their frequently used information.

空氣品質PM2.5 is a comprehensive weather app that provides users with real-time air quality information. With its various modes and features, users can easily stay informed about the air quality around them.