Add-ons

Add-ons are optional extras the customer can layer on top of a service. They have their own price, their own duration, and — uniquely — their own optional item fields.

What makes add-ons different from services

Aspect	Service	Add-on
Customer flow	Picked in the Category step.	Picked in the Add-ons step.
Can have its own item fields	Yes	Yes
Has its own time slot	Yes	No — added to the service slot
Pricing	Base + fields	Flat or per-unit
Standalone bookable	Yes	No

The killer feature

Because an add-on can have its own item fields, you get conditional questions for free. The "Type of mattress" field only appears when the customer selects the "Mattress cleaning" add-on. Nothing to configure, no conditional-logic plugin.

When to use add-ons

Upsells: Inside fridge, Laundry wash & fold, Window cleaning.
Variants that share a base service: Standard / Deep mattress cleaning.
Service-specific questions: Oven size only if Oven cleaning is picked.

Where to find it

Advik Booking → Services → Add-ons tab.

Creating an add-on

Open the add-ons tab
Click Add-ons.
Click Add Add-on
Modal opens with three sections.
General: name, price, duration
Required: Name. Price is added flat. Duration (minutes) is added to the booking.
Placements: which categories can use it
Pick the categories where this add-on should be available. A customer can only add it if the parent service is in one of these categories.
Item fields: ask follow-up questions
Attach any fields the customer should answer only when they pick this add-on. E.g. Type of mattress, Oven size.
Image (optional)
A small thumbnail in the add-on grid.
Save
The add-on is now selectable on any service in the chosen categories.

Field reference

Field	Required	Notes
Name	Yes	Customer-facing.
Description	No	Short helper text.
Price	Yes	Added to the service subtotal.
Duration	No	Minutes added to the booking total.
Image	No	Small thumbnail in the add-on card.
Categories	Yes	Multi-select. Determines where the add-on is available.
Item fields	No	Questions asked only when this add-on is selected.
Active	Yes	Off = hidden from the form.

Dynamic add-on steps (Sprint 17+)

For very specific services, you can promote an add-on to a full standalone step in the booking flow. The customer sees a dedicated step just for that add-on, complete with its own fields, before the date picker. This is configured in Settings → Booking Flow and is useful for things like Mattress cleaning or End-of-tenancy certificate where the question is too important to bury.

Global toggle

If you want to disable add-ons across the whole site, go to Settings → General → Add-ons and turn off Enable Add-ons. The Add-ons step is hidden from the booking flow, and the field is hidden from the price breakdown.

Common gotcha

Add-ons only show up on the booking form if:

The add-on is Active.
The service being booked is in one of the add-on's placements.
The Enable Add-ons global toggle is on.

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Add-ons ready?

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