Levoit Core 200S Smart Air Purifier

The Levoit Core 200S is the best entry-level smart air purifier in this roundup. The three-stage filtration — pre-filter, H13 True HEPA and activated carbon — removes 99.97% of particles down to 0.3 microns including dust, pollen, pet dander and smoke. App control via the VeSync app allows scheduling, real-time air quality monitoring and voice control via Alexa and Google Home. The compact cylindrical design fits on a bedside table or desk without taking up significant space. Covers rooms up to 20m². Near-silent at 24dB on sleep mode — the quietest in this roundup at this price.