Keeper.sh now delivers changes to your other calendars sooner. When Google or Outlook notifies Keeper.sh that an event changed, that calendar is read straight away, in its own lane ahead of scheduled checks, instead of waiting behind them.
A newly connected calendar is copied to its destinations at once, instead of on the next scheduled run, and Pro accounts are scheduled first.
The plan timings are unchanged: on Free, your calendars are checked every minute and changes are copied every 30 minutes, and on Pro, Google and Outlook changes land within seconds and iCloud, Fastmail and other CalDAV calendars update every minute.
Keeper.sh pricing compares sync timing on Free and Pro.