There’s no web client, and the Windows client is limited to Windows 10 and higher — so if you’re using a Windows 7 system, you’re out of luck, and with a Chromebook, your only option is to install the Android app and use it there (an experience that’s better than Spark’s ...
“- I don’t mind the scanning of my email for ads to push at me or for improving my GoogleNow experience. (It’s the definition of “other purposes” that I take issue with)”