Fly: Bundles & Quantity Breaks by Skai Lama is a Shopify app that helps merchants boost average order value with tools like fixed bundles, quantity-break (volume) pricing tiers, frequently-bought-together upsells, free gifts, and add-ons. It lets you use templates and unlimited design customizations. You get real-time inventory sync, detailed analytics, variant-level pricing, and seamless integration with Shopify themes, side carts, and page builders. Pricing tiers scale by monthly bundle sales, from a free plan ($0 for up to $1,000 in bundle sales) to higher plans for $299/month or more. Subscription product bundling has some limitations due to Shopify platform constraints.