If you're looking to Download ParticleSense on your Chromebook laptop Then read the following guideline.

Note: This app requires a Pollen Sense Automated Particle Sensor Model APS-400 or later. If you do not have a sensor please go to https://pollensense.com to purchase one. Note: This app is still in early access and there might be issues or bugs. If you find any, please file a bug report inside the app when viewing a sensor. Particle Wise is THE best way to manage your Automated Particulate Sensor by Pollen Sense (“Sensor”). Enjoy a more seamless setup experience than on the web by using Bluetooth technology to pair your phone to your sensor to connect it to your WiFi network. After setup, see detailed graphs and charts with data from your sensor, or monitor the status of your sensor. In addition, basic sensor controls like turning on and off air monitoring are provided.