The application is based on the received measurement data such as:
- concentration of suspended dust PM1, PM2.5 PM10,
- atmospheric pressure,
- air temperature and humidity,
determines the IAQ air quality index.

Interpretation of the IAQ indicator:
(0-50) - Okay.
      Air quality generally considered satisfactory. Air pollution at this level has little or no impact on health
(51-100) - Moderate.
      Air quality is acceptable for most people. The most sensitive group of the population may, however, experience discomfort
(101-150) - Poor.
      Negative health effects may occur in a sensitive part of the population. Most of the population should feel relatively well
(151-200) - Unhealthy.
      The entire population begins to experience negative health effects. In the most sensitive part of the population, such levels can be very dangerous to health
(201-300) - Very unhealthy.
      Staying in such conditions may result in serious health consequences for the entire population.
(301-500) - Harmful.
      Serious health hazard. Staying in such conditions is definitely harmful to your health.
(500+) - Toxic.
      It is impossible to live in such conditions. It is unhealthy, dangerous, unwise and then some.

The application communicates with an external device wirelessly via Bluetooth, downloading measurement data from the device and enabling its configuration.