TidyCal

This is a great replacement for Calendly - even allowing for an import of events from Calendly to make setup even easier!
Delivers all the functionality WITHOUT the ongoing cost. Multiple events, chargeable events, but by far-and-away, what sealed the deal for me was full synchronisation with my APPLE CALENDAR... which it seems fewer and fewer alternatives allow, including the biggest competitor (calendly) which used to... BUT THEN STOPPED!!!
Buy this product you will NOT Be disappointed!