This thing works great! Love the color coding, the clean crisp air and the indicator for the filter. I thought an app would of been great for it but its not necessary. This machine was built to be on 24/7 and filter replacement anywhere from 12 to 15 months depending on air quality. My sinuses have not been an issue at all.I think i may order one for the rooms next. Glad i did my research and found this.