CatchApp for iPhone
Cancelling a confirmed event in CatchApp for iPhone is easy. Simply go to the event, open it and scroll to the bottom of the page. You will see a 'Cancel' button.
What happens when you cancel an event?
It will be removed from CatchApp, and deleted from whichever calendar CatchApp is synced to (Apple or Google). The person, or people, who you had the meeting with will also be notified via email.
CatchApp for Outlook Email
If you would like to cancel an event organised by CatchApp for Outlook Email, you will need to delete it manually from your calendar and inform all invitees via email.