Air Quality monitoring app

* We want to determine the personal air quality index according to our location not to our city because we want a precise information not vague. Apps Link: Choose App : AirVisual from the link below https://www.gizmochina.com/2019/12/30/best-air-quality-monitoring-apps/ * When describing system1 , system2,… , you extract the advantages and disadvantages of each one. after that, in the next step for the comparison, you need to compare these systems with your system.