Souvely adds product personalization without custom theme code.Create rules for text and image options, set prices, assign products, and optionally define engraving areas on a mockup.Shoppers personalize on the product page. Fees are added at checkout, and the order includes text, images, and preview details for fulfillment. Setup uses a theme app embed and checklist: enable the embed, create a rule, assign a product, then test on your store.