미세나우 is a free weather app developed by Digital on net for Android. It provides real-time air pollution and fine dust (PM10 and PM2.5) levels based on the user's location. The app also includes information on ozone (O3), sulfur dioxide (SO2), nitrogen dioxide (NO2), and carbon monoxide (CO) levels. The app provides accurate real-time values for each pollutant and allows users to check the air quality index (AQI) levels, which are classified into 1-6 stages based on the US AQI.

The app provides real-time information from the Ministry of Environment, Korea Environmental Corporation, and Korea Meteorological Administration. Users can also add information from other measurement areas to the app for convenience. Additionally, the app includes a camera function that allows users to take pictures and share them directly on social media. The app overlays AQI pollution levels on the photos taken. The app also offers real-time temperature and humidity display, AQI level notifications, and provides rankings for areas with high levels of air pollution.