Connect Google Calendar, Outlook and iCal. Bookings appear instantly in your calendar, and existing events automatically block busy slots.
A booking system is only useful if it respects the calendar you already use. 4appointments syncs two-way with Google Calendar, Microsoft Outlook and any iCal calendar: every new booking shows up immediately as an event, and every existing event (a meeting, a break, a personal appointment) automatically blocks that slot on your public booking page. You avoid double-bookings and never keep two diaries in parallel. For teams, each member connects their own calendar, and displayed availability is the real union of everyone.
You sign in with Google or Microsoft (OAuth) and authorise calendar access. For any other calendar, you add an iCal link. From then on, 4appointments reads your busy times so it never offers a taken slot, and writes every new booking as an event with all the details. You copy nothing by hand.
Many systems show "working hours" but ignore what is already in your calendar. 4appointments combines your working hours with the real events in connected calendars and your buffer rules. If you have a meeting at 2pm, that slot disappears from the booking page automatically — nobody can book over it.
Each specialist connects their own calendar. When a client picks a service, the system checks availability for everyone qualified and shows only the truly free slots. On reschedule, the event moves to the correct person’s calendar with no manual work.
Google Calendar, Microsoft Outlook / Microsoft 365 and any calendar exposing an iCal (ICS) link. Connection uses secure sign-in (OAuth) for Google and Microsoft.
Yes. Bookings made in 4appointments appear as events in your calendar, and events created directly in your calendar block slots on the booking page. Changes on one side reflect on the other.
Yes. You can check your personal and business calendars at once, so a personal event never clashes with a client booking.
Each client sees slots in their own time zone, and you see them in yours. Conversion is automatic — handy for online consulting with clients abroad.
You get a prompt to re-authorise. Until then, 4appointments uses the last known state and your working hours so bookings are not blocked.
Google, Outlook or iCal — two-way sync and real-time availability.
