Breathing Index
A personal air quality index. The composite AQI reduces every pollutant to one number.
Breathing Index shows each exposure variable — smoke, dust, ozone, NO₂, heat, humidity —
separately, learns which ones actually affect you from your own symptom diary, and
predicts your day on a four-level scale: 1 Easy, 2 Noticeable, 3 Limiting, 4 Dangerous.
It needs JavaScript to run. Data comes from Open-Meteo, with AirNow station comparison in the US.