Medify MA-40 Air Purifier vs Levoit Core 400S Air Purifier

The Levoit Core 400S is the better pick for most people. It adds app and voice control, an auto mode driven by a PM2.5 sensor, and a filter that lasts about a year, while drawing less power and running quieter at its low end. The Medify MA-40 is a simpler machine with a lifetime warranty, an optional ionizer and UV light, and a taller, narrower body. Owners of both report solid cleaning for large rooms; the Levoit wins on smart features and running costs, the Medify on warranty and simplicity.

• Choose the Medify MA-40 if you want a no-app purifier with a lifetime warranty, an optional ionizer and UV stage, and you don't mind changing the filter every few months.
• Choose the Levoit Core 400S if you want app and voice control, automatic fan speed from a PM2.5 sensor, quieter low-speed operation, and a filter that lasts about a year.