Click the icon that looks like a ruler to change the units of the current graph being displayed. See the video for more details.
The PocketLab Web App is available on Chromebook and Mac OSX (click here for instructions on how to see if your Mac is compatible). Use the web app if you want to connect to PocketLab Voyager, PocketLab Weather or PocketLab One on these devices. You can also connect to the web app on an Android tablet or phone using Android 5.0 or later. Android also has a native app that you can download from the Google Play Store.
To connect to the PocketLab Web App go to thepocketlab.com/app in an updated Chrome browser. Make sure Bluetooth is turned on and follow the onscreen instructions.