Add dropdowns, swatches, checkboxes, text fields, and file uploads to any product, and sell paid extras like engraving or rush service. Shoppers see the total update as they choose. In cart and checkout, the add-on fee is recalculated on the server and stays on the same line as the product. Missing or invalid choices are blocked. Checkout Guard runs test carts on your store and flags any add-on total that doesn't match. Every change is saved, so you can restore an earlier version.

• Add paid extras like engraving, gift wrap, or rush service
• Shoppers see the total, add-ons included, update as they choose
• The add-on fee stays on the product's cart line, so it can't be removed
• Dropdowns, swatches, checkboxes, text, file upload, and conditional logic
• Checkout Guard runs test carts to check your add-on totals