Meet the GermGuardian WiFi Air Cleaning System: a smart tool with Alexa voice control that lets you monitor and control air quality in your home from anywhere. It has a HEPA filter to capture 99.97% of allergens and reduce odors. It also uses UV-C light to kill the germs. The filter lasts up to 8 months.
The unit can automatically adjust its speed to improve air quality in any room. It alerts you when you need to change its filter or UV bulb. Costs under $200 at this time.