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Addlark lets shoppers choose optional extras on product pages, with clear prices before adding to cart. Offer gift wrap, accessories or a personalized service using your own products. Show offers on all products or selected products, then keep extras linked to the main item in Shopify cart and checkout. Addlark uses its own Add with extras button and requires a compatible theme app block. It supports one-time purchases, with quantity matching when items are added.
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