This app is just okay. Wish it would allow for 12 hour standard time instead of using 24 hour time. Also it would be nice if it would allow you to import your iOS calendar to your other groups but only show you as busy and not show the specific details of the events unless specified. This way I wouldnt have to re-enter everything that I need to show as busy but keep private client info on. My friends had a hard time getting invitation links to join calendars to work.
gwizzbabe83 about TimeTree: Shared Calendar