With Orangement it is possible for users to find appointments with another user.
Apply without obligation and receive all rights as a so-called provider. As a provider you can arrange your calendar at your option and mark appointments as free. Afterwards you can invite the so-called subscribers (your customers), to grant access to your calendar.
A subscriber selects a favored, free appointment. After your confirmation this appointment will be saved as approved and both sides receive a notification about the appointment arrangement.