Shopify Mobile Apps for Shopify Plus Brands: What Changes at Scale (2026) Last updated: May 2026 | Reading time: 7 minutes Shopify Plus brands have specific mobile app requirements that differ from standard Shopify brands. The additional APIs, checkout customisation options, and data access available to Plus merchants change what's possible in a native app build. What Shopify Plus adds for mobile apps Checkout Extensibility on Plus. Plus merchants have access to custom checkout fields, post-purchase upsell steps, and checkout UI extensions. In a native app context, Checkout Kit on Plus can be configured with custom checkout steps unavailable on standard Shopify. Shopify Functions. Custom server-side logic — custom discount logic, custom shipping calculations, custom cart transforms. In a mobile app, Functions power custom bundle pricing, tiered discount logic, and complex promotional mechanics. Multipass. A feature enabling seamless SSO between external systems and Shopify.…