Meet the FitAir: an app smart air purifier that cleans the air anywhere. It has a compact design but can clean 25 square feet of space around you. You get 3 levels of air flow adjustment. The device has a H13 HEPA filter with 97.8″ filtration efficiency. Its battery can last for up to 6 hours.
The companion app displays air quality around you and battery level. You can get FitAir for under $100 at this time.