Migrating Shop app from React Native to native (2026) - Shopify

This post details the migration of the Shop app from React Native to native iOS (SwiftUI) and Android (Jetpack Compose) development, driven by advancements in AI coding agents. It highlights the proof of concept, the achieved improvements in startup time (23% on iOS, 50% on Android), session stability (10x reduction in crashes), app size (109MB smaller on Android), and runtime performance. It also discusses the agentic development workflow, the use of tools like Tardis for debugging and parity reviews, and the essential role of native expertise.