Use this add-on to boost your sales with upsell by recommending products that are relevant to an ongoing purchase. Personalize shoppers' experience with a fully customizable Upsell reminder that you can use in the Mini Cart & Cart Page. Show related products dynamically through Shopify to incrase your sales.
From the Smootify news archive. Some of it describes Smootify 1.x; see the changelog for what changed since.