Appointment booking logic, restrict items/services to require base service/item

[EcoCarCafe]

Would love to see the ability to restrict the booking of certain items/services with logic that requires a base item/service to be added to an appointment first. Currently an item/service has the ability to be booked or not booked by a customer but we need more flexiblity than that with our business because there is a hierachy when it comes to our service.

We are an auto detailer that wants customers to book a basic detail (interior, exterior, or package), however we have additional services that are worth offering to a customer that could be added to their appointment but we would not book them by themselves or individually. 

Example. A customer books an interior detail, but after that selection we'd want to make visible to them a selection of add-on services (pet hair/mold removal, leather treament, etc.). However many of those services are not and should not be a stand alone service. Therefore creating a heirachy or logic condition that requires the selection of a base/primary service (interior detail) before allowing an add-on service to be booked would be extremely helpful. 

[Jacky_MBL]

This would be helpful for us in the lash extension industry as well. Add-ons will help create a more intuitive and smoother booking process for our clients. 

We currently use an Add-ons service category. It is not obvious which services are compatible without creating additional mini menus. Also, the add-ons are buried at the bottom of our service list.

[BHAUS]

I would also like this function. we are salon and spa. 

[Doran]

This would be helpful for esthetics. 

Ideally, I would like to see it in Square Go like this.

Customer books facial.

Then the system asks:

Would you like to add on:

Dermaplane $50 20 mins

LED Mask $35 15 mins 

Lymph Massage $35 15 mins

etc

The customer could check all that they would like to add on.  

This would help clean up/minimize my service menu and be more like the in-person booking experience.  Also, it would up my per- ticket revenue.  Sometimes clients want to add on but I don't have the time due to scheduling.  If they could add on at the time of booking or confirmation text it would make the process easier.  

This would also prevent clients from booking a service that is only an add on or has a lower price added on vs stand alone.