There was a brand that worked by filling the tank with water and applying a vacuum to use the water as a filter. They weren’t amazing but they cost like $2k in 2001 money. My ex had one that her father had bought and I finally convinced her to get rid of it once it started shocking her.
Outlook is pretty good, and exchange does a decent job of making calendars available on mobile, web, or desktop client.
The outlook web app is the expected future.
Does it not work well with other calendar servers?