This app is no longer maintained and is only intended for use with Wave Gen 1 monitors. If you don’t have a Wave Gen 1 in your setup, please use the Airthings app. To know if you have a Wave Gen 1, look for serial numbers starting with 2900. You can find the serial number on the label at back of your monitor where the batteries are stored. If you have questions about using the app please contact support@airthings.com.