Canairy is a free Android app developed by the British Safety Council, designed to protect outdoor workers from pollution. It is an essential tool for those working in London, where air pollution is a significant concern. The app tracks the user's location in the background and calculates their exposure to pollution every hour using data from King's College London's air quality research department.

Canairy is part of the Time to Breathe campaign, which highlights the exposure of outdoor workers to pollution. With the app, users can take necessary precautions to reduce their exposure to harmful pollutants and protect their health. It is a must-have app for anyone working outdoors in London, and it is available for free on the Google Play Store.