As long as your calendar is available in a .ics feed format (most of them are), it’s no trouble. We have instructions on our Tracking page for you to set up Google, Apple iCloud and Microsoft Outlook calendars.
Clockk is targeted at agencies, but it works well for anyone who does the majority of their productive work on their computer. You just might have fewer projects, and you won’t be able to take advantage of the billing features.
But on the plus side, you’ll have an unparalleled view into how you use your time. No other tool gives you the detail that Clockk does.