Best free Cash on delivery (COD) Shopify apps in 2026 [Updated]

The Best Free Shopify apps for Cash on Delivery (COD) help merchants manage COD orders effectively while reducing return-to-origin losses. These essential tools offer customizable order forms, OTP verification, conditional COD fees, and smart checkout features. From simple one-click forms to comprehensive solutions with upsells and WhatsApp integration, these apps let store owners control payment methods, validate orders, and encourage prepaid transactions - all without any upfront costs.