AddOnce
Free planAttach optional products to any Shopify product using native products and variants. Simple setup, native cart lines, and a 14-Day Full Access Trial.
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Marketing and conversion apps > Upsell and bundle apps > Upsell and cross-sell apps
Tempt them with upgrades, “pairs well with,” and other hard-to-resist items.
Rank: 993 / 1039
Last seen 2026-08-08
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