How do calendars work?

Connect Google Calendar for two-way sync, or subscribe to one or more Apple or iCloud calendars by pasting their share links (read-only). Trailwise reads your appointments to fit your training around them. Your Agenda shows them with their titles, but the intelligent coach only learns when you are busy and how much free time a day has, and a coach you share your data with never sees what your appointments are. Your main calendar decides where Trailwise writes: Google Calendar, your iPhone calendar (through the Trailwise app) or None. With Google as main, Trailwise adds your race days and your planned and completed sessions to your primary Google calendar, and only ever changes the events it created. Disconnecting any calendar removes its appointments from Trailwise, and your training plans no longer take it into account. Disconnecting Google Calendar also removes the upcoming sessions, race days and race tasks Trailwise added there and Trailwise's access at Google; past ones stay in Google until you delete them.