According to Greenpeace report, the App provides recommendations to various categories (children, pregnant women, elderly) of people. The recommendation varies from no action needed on 'good days', wearing masks on moderate days to shutting down schools on bad air days.

To keep the information up to date it ?borrows data from the National Air Quality Index (NAQI) website itself. It provides data for 16 cities including Patna, Muzaffarpur, Delhi, Ahmedabad, Faridabad, Bengaluru, Mumbai, Pune, Navi Mumbai, Chandrapur, Chennai, Hyderabad, Agra, Lucknow, Varanasi and Kanpur. The app is currently available for android users.

A) How can one protect oneself:

# Masks: Wearing N95 masks will provide effective protection against PM2.5. N95 masks can be purchased in pharmacies and can be used multiple times.

# Reduce activity: Try to stay indoors during the most polluted hours of a day, which is normally from dawn till dusk. Do less physical activities outdoors.

(B) AQI and associated health impacts

AQI Associated Health Impacts

# Good (0-50): Minimal impact

# Satisfactory (51-100): May cause minor breathing discomfort to sensitive people.

# Moderately polluted (101?200): May cause breathing discomfort to people with lung disease such as asthma, and discomfort to people with heart disease, children and older adults.

# Poor (201-300): May cause breathing discomfort to people on prolonged exposure, and discomfort to people with heart disease.

# Very poor (301-400): May cause respiratory illness to the people on prolonged exposure. Effect may be more pronounced in people with lung and heart diseases.

# Severe (401-500): May cause respiratory impact even on healthy people, and serious health impacts on people with lung/heart disease. The health impacts may be experienced even during light physical activity.