Blue Sky

The air you breathe now has a number, time, and address. Blue Sky shows it all on a single screen.

Track the Air Quality Index (AQI) of your region in real time, understand which pollutants are currently affecting you, and discover the best time of day to go outside, exercise, or open a window.

REAL-TIME AIR QUALITY
The AQI of the point closest to you, with temperature, humidity, and wind on the same screen. Each level comes with a clear explanation of what it means — and a specific warning for those who are more sensitive: asthmatics, pregnant women, children, and the elderly.

SENSOR MAP AND HEAT MAP
Explore the city in two modes. View sensor by sensor, with the current index and how long ago each one reported, or switch to the heat map and see the pollution patch by neighborhood. Search by address or region and compare where you live, work, and study.

POLLUTANTS, EXPLAINED
PM2.5, PM10, Ozone, NO₂, CO, and SO₂ organized by level of attention. For each one: where it comes from, how it affects you, how far it is from the safe limit, and how it has varied in the last 7 days. No jargon and no alarmism — just what helps you understand the air on your street.

WHAT YOU CAN DO TODAY
Cycling, walking, outdoor training, ventilating the house: the app organizes activities into allowed, caution-based, and avoidable, according to the current air quality. Open any activity and see the ideal time window, the pollutant that most interferes with it, and a practical tip — such as avoiding highways on your bicycle or ventilating the house before training, not during.

7-DAY FORECAST
Minimum and maximum temperature, predicted rainfall, wind chill, and the day's curve hour by hour. Plan your week knowing which days the air and weather are in your favor.

EDUCATIONAL CONTENT WITH SCIENTIFIC CURATORSHIP
Articles and news selected by the LQA of PUC-Rio, related to what's happening in the air right now. Learn why ozone rises in the afternoon, why the morning is usually clearer, and what the wind has to do with it.

NOTIFICATIONS WHEN IT MATTERS
Activate alerts and know when conditions change, without having to open the app.

MADE FOR EVERYDAY LIFE
Light and dark themes, approximate location only (never fine precision), and data from public monitoring networks combined with reference stations from the Blue Sky network.

Breathing is automatic. Knowing what you're breathing isn't. Download Blue Sky.

The information in this app is for informational and educational purposes only and does not replace medical advice.