The Blueair Friend app helps you to be informed about air quality and what you can do to improve the air you and your loved ones breathe. It is a reliable tool that informs you about the outdoor air quality in real time, and recommends what measures you can take to stay healthy. Together with the Blueair Sense+ air purifier and the Blueair Aware air quality monitor, it also allows you to monitor and control your indoor air quality. The Blueair Friend app allows you to control functions, such as the airflow speed, led light, child lock and night mode, on your Sense+ purifier. You can turn the unit on and off remotely by using the app, to make sure you always breathe clean indoor air when you arrive at home. If you dont already own a Blueair purifier or an Aware air quality monitor, you can benefit from the Blueair Friend air quality readings. The app provides data on a continuous basis from thousands of independent air monitoring stations across 150 countries to ensure you have access to trustworthy information on air quality. Air quality is rated on a scale of 0 to 500, identifying categories from good to hazardous. Based on this information, you get recommendations on what actions to take in order to keep you and your loved ones safe and healthy. The app also provides detailed information about airborne pollutants, such as volatile organic compounds (VOCs) and fine particulate matter with a diameter of 2.5 micrometers or less (PM2.5), which are the most unhealthy. The Blueair Friend also reports indoor temperature, humidity and CO2 levels.