Air purifiers are quite useful for folks suffering from allergies. The VIGILANT Leaf is not your average air purifier. It is a smart device that pairs with your smartphone and measures indoor air quality. It also measures particulate matter (PM2.5) and uses high performance filters to clean your air. In fact, the Leaf has Swiss made nylon precision woven, high grade activated carbon, HEPA filters.
The Leaf lets you control it from your smartphone and share your data with others. It looks quite elegant too. The device is available in two models: Leaf 500 and Leaf 800. Not cheap though.