Zoho Calendar (Refresh Rate)

Why don't the calendars refresh more than every 12 hours? That is crazy. I cannot be the only user who wants to see this change?

I see and understand that I can MANUALLY update them, but need them to auto refresh either (1) whenever there is a change or (2) every few minutes.

Heck, I'd even pay a a buck or two extra per month for the option of having autorefreshes every few minutes OR manually.

Please advise ASAP.