Jaère is a lifestyle application developed by Groupe VYV focusing on health and fitness. The app aims to help users improve indoor air quality by considering external air conditions. By utilizing the Air Quality Index (AQI) established by the World Health Organization, Jaère suggests optimal moments to ventilate indoor spaces based on outdoor air quality. Additionally, it integrates data from the National Aerobiological Surveillance Network to provide insights on pollen levels, crucial for allergy sufferers.

Users can receive notifications about pollen concentrations, pollen season start dates, and peak presence times. Jaère also offers recommendations on when to avoid opening windows if outdoor air quality is poor. The app stores all data locally on the user's device and is ad-free, ensuring a user-friendly experience for those looking to enhance their indoor environment.