If you're the kind of person who worries about air pollution, there's a new app for iOS and Android devices that will tell you exactly what you're breathing in, Digital Spy said.

The Plume Air Report originally launched in France to monitor the quality of the air around Paris, but it's since caught on in London.

Part-funded by the French government, the app measures the air quality by drawing data from 11,000 sensor-equipped stations located around 30 different countries.

Information about nitrogen dioxide, ozone and carbon monoxide is relayed to your phone, and the air around you is rated on a scale from 'fresh' to 'extremely polluted'.

If offers hourly forecasts, just like a weather app, and includes useful advice for parents, cyclists, runners and people dining out in the open.

"What we've built is digital tools to help people breathe better, by informing them on what it is that they're breathing," said the app's founder Romain Lancombe.

More than 3,000 Londoners have downloaded the Plume Air Report since launch.