Hello Sir,
I have done Car Wash Booking App ,which uses selection of type of service, selecting the pricing plans, select Date/time slot for booking...DB part in firebase
Your App too would have similar feature for booking like, Type of service (Haircut, Facial etc), pricing plans (Gold ,platinum etc), Date/Time selection for booking appointment
I'm sure I can do it for you
If interested, lets discuss
Thanks
Apeetha