Blue, is a French designed and patent pending device that helps people effectively manage their personal exposure to indoor/ outdoor air pollution. Blue monitors real-time geo-localized personal exposure to air pollutants such as PM2.5 (Ultra-fine Particulate Matter), VOC (Volatile Organic Compounds) and other environmental parameters. The user can see the personal air quality information on both the blueApp and the blueWebsite. blueApp also provides personalized advice through instant notifications with actionable measures to reduce exposure to harmful air. And blueWebsite provides access to a live-map showing averaged regional data and summarized historical data which can further help the users take health-conscious decisions about their outdoor plans. Ultimately, blue can connect to selected air purifiers, air conditioning or dehumidifiers to optimize their energy use and filters.