--- title: "Free React Native Ebooks & Engineering Guides | Callstack" description: "Download free guides from Callstack engineers on React Native performance, migrations, and cross-platform development, including AI-assisted delivery." url: https://www.callstack.com/ebooks updated: 2026-11-06T10:13:47.849Z --- # Free React Native Ebooks & Engineering Guides | Callstack Download free guides from Callstack engineers on React Native performance, migrations, and cross-platform development, including AI-assisted delivery. ebooks ## In-depth guides to React, React Native, and AI Practical guides to cross-platform development, performance, and AI-assisted engineering, grounded in our work on production apps. ### [React Native at Scale 2026](https://www.callstack.com/ebooks/react-native-at-scale-2026) Enterprise · 2026 React Native has an established production record. Running it reliably at scale still takes clear ownership, release controls, and time for platform work. This field guide draws on interviews and survey responses from 12 organizations with extensive or distinctive React Native experience. We connect their accounts with a decade of React Native contributions and enterprise delivery, including our work as core contributors and founding members of the React Foundation. Use it to decide what your organization needs to address next. [Download](https://www.callstack.com/ebooks/react-native-at-scale-2026) ### [Migration to React Native in the AI Era](https://www.callstack.com/ebooks/migration-to-react-native-in-the-ai-era) Brownfield · 2026 AI agents can help teams understand how an existing mobile app behaves and recreate that behavior in React Native faster. Architecture, feature parity, release risk, and ownership still require human judgment. This ebook gives mobile and engineering leaders a framework for making those decisions before committing to a full migration. - Compare brownfield, greenfield, and checkpoint-based migration paths - Keep product work moving during the transition - Use OTA updates with the right rollout, monitoring, and rollback controls - Build an ROI case from your current delivery data [Download](https://www.callstack.com/ebooks/migration-to-react-native-in-the-ai-era) ### [The Ultimate Guide to React Native Optimization](https://www.callstack.com/ebooks/the-ultimate-guide-to-react-native-optimization) Performance · 2026 Callstack’s _Ultimate Guide to React Native Optimization_ has become a trusted reference for React Native teams. This refreshed edition is built around the problems engineers are dealing with now: slow startup, dropped frames, re-renders, memory leaks, thread boundaries, and bundle bloat. - Built around practical performance work, not generic advice - Covers runtime smoothness and startup speed - Updated for the New Architecture and current React Native tooling - Written for developers, senior engineers, and tech leads [Download](https://www.callstack.com/ebooks/the-ultimate-guide-to-react-native-optimization) ### [React Native Developer’s Guide to Meta Horizon OS](https://www.callstack.com/ebooks/react-native-developers-guide-to-meta-horizon-os) Virtual Reality · 2026 If you already build with React Native, Meta Quest is a new platform you can reach without switching stacks. Because Meta Horizon OS is built on Android, React Native works where you’d expect: same workflow, same core abstractions, new form factor. VR changes the interface, not the fundamentals. This hands-on guide shows you how to bring a real React Native app to Meta Quest, from setup and library choices to productive workflows and a store-ready release. Read it to find out how to: - Build and run a React Native app on Meta Quest using Expo Go and development builds - Understand what changes on Meta Horizon OS (permissions, input, performance) - Choose compatible libraries and swap in Quest-ready alternatives - Explore high-signal app categories that make sense in VR - Debug, profile, and integrate native modules with standard RN workflows - Create a store-ready build and publish it through Meta’s submission pipeline [Download](https://www.callstack.com/ebooks/react-native-developers-guide-to-meta-horizon-os) ### [The Ultimate Guide to React Native TV Development](https://www.callstack.com/ebooks/the-ultimate-guide-to-react-native-tv-development) TV · 2025 Modern TV platforms share familiar foundations yet behave unlike any other device class. This guide gives you a clear path through that landscape, from understanding the hardware and operating systems to designing effective 10-foot interfaces, managing focus, streaming video reliably, and preparing an app for production at scale. You’ll learn how React Native fits into the TV ecosystem, how to build for platforms like tvOS, Android TV, Tizen, and webOS, and how to navigate the practical engineering challenges behind living-room experiences. - Understand the TV ecosystem and its platform constraints - Design interfaces for the 10-foot experience and remote-driven navigation - Build performant TV apps using React Native and react-native-tvos - Implement video playback, accessibility, focus management, and testing strategies Written by engineers at Callstack and Amazon with deep experience in cross-platform development, this guide helps teams use their React skills to ship consistent, reliable TV apps across devices. [Download](https://www.callstack.com/ebooks/the-ultimate-guide-to-react-native-tv-development) ### [Incremental React Native Adoption in Native Apps](https://www.callstack.com/ebooks/incremental-react-native-adoption-in-native-apps) Brownfield · 2025 This guide is for iOS and Android teams who want to experiment with React Native gradually, without slowing delivery or rewriting the whole app. You’ll get: - A side-by-side look at legacy vs. modern integration approaches - How the Packaging Approach and React Native Brownfield library simplify setup - Step-by-step walkthroughs for iOS and Android - Real-world migration insights from the Callstack team This guide will help you bring React Native into production safely and incrementally. [Download](https://www.callstack.com/ebooks/incremental-react-native-adoption-in-native-apps) ### [React Native Performance Optimization with DMAIC Guide](https://www.callstack.com/ebooks/react-native-performance-optimization-with-dmaic-guide) Performance · 2025 From struggling with slow app load times to inefficient user interactions, performance issues can harm your business and frustrate your users. This ebook presents a structured, data-driven approach, DMAIC-to diagnose, address, and sustain performance improvements in React Native applications. Based on a detailed real-world case study, you'll learn precisely how DMAIC can help achieve measurable enhancements: - Cut down app start times drastically. - Accelerate critical user interactions. - Maintain consistent performance through continuous monitoring. Authored by Callstack's software engineers, this ebook provides actionable guidance to significantly boost your application's speed, efficiency, and overall user experience. [Download](https://www.callstack.com/ebooks/react-native-performance-optimization-with-dmaic-guide) ### [Incremental React Native Adoption Reimagined](https://www.callstack.com/ebooks/incremental-react-native-adoption-reimagined) Performance · 2025 The challenges organizations face when migrating to React Native often feel familiar. In this guide, we detail three proven scenarios for adopting React Native, each illustrated by real-world examples from global enterprises. Discover how React Native can transform your applications effectively and safely, without disrupting business operations. Here's what you'll read about if you download it: - Validating React Native viability with a real-world Proof of Concept. - Consolidating development through hybrid migrations. - Replacing siloed native code with reusable React Native components. Authored by Michał Pierzchała and with the input of software engineers working on brownfield projects on a daily basis, this guide provides clear instructions for implementing incremental React Native adoption in your organization. [Download](https://www.callstack.com/ebooks/incremental-react-native-adoption-reimagined) Hire us ## Need React or React Native expertise you can count on? We’ve spent years building full-stack, cross-platform apps and solving tough technical challenges. How can we help you? [Let’s talk](https://www.callstack.com/contact) Insights ## Your next read or watch starts here Explore articles, interviews, and demos on React, React Native, and AI engineering, with lessons from the people building the tools. [View all](https://www.callstack.com/insights) - [Building a Software Factory: Write Specs an Agent Can Build From](https://www.callstack.com/blog/building-a-software-factory-write-specs-an-agent-can-build-from) (Nov 6 · Article): Learn how to research requirements, resolve open decisions, and write testable specs that AI coding agents can implement without the planning conversation. - [ Large-Scale Migrations With Coding Agents: Planning, Verification, and Rollback](https://www.callstack.com/blog/large-scale-migrations-with-coding-agents-planning-verification-and-rollback) (Nov 4 · Article): Plan codebase migrations with coding agents using reviewable requirements, verification checks, staged rollouts, and defined rollback criteria. - [Conversational Banking: From Customer Questions to Authorized Actions](https://www.callstack.com/blog/conversational-banking-from-customer-questions-to-authorized-actions) (Nov 2 · Article): Explore conversational banking architecture through a card-dispute example, covering tool access, authorization, execution, observability, and human handoff. - [How AI Agents Can Cut Manual QA by 30%](https://www.callstack.com/blog/how-ai-agents-can-cut-manual-qa-by-30) (Oct 30 · Article): Explore an agentic QA workflow targeting 30% less manual effort across mobile, web, and TV, with test selection, failure triage, and validation. - [Building a Software Factory: The Night My Agents Waited for Me](https://www.callstack.com/blog/building-a-software-factory-the-night-my-agents-waited-for-me) (Oct 28 · Article): Learn how permissions, review limits, and missing product decisions stalled two overnight coding agent runs, and how their maintainer revised the workflow. - [Your AI Coding Agent Still Needs an Architecture](https://www.callstack.com/blog/your-ai-coding-agent-still-needs-an-architecture) (Oct 22 · Article): Use explicit contracts, behavior tests, and dependency checks to guide AI coding agents and review their changes through a TypeScript favorites example. - [Who Left the Agents Running? React Native Software Factories](https://www.callstack.com/events/who-left-the-agents-running-react-native-software-factories) (Oct 15 · Live Stream): Join Kewin Wereszczyński and Szymon Chmal to explore what can go wrong in a React Native software factory overnight and the controls that keep agents on track. - [When Coding Gets Faster, What Breaks Next?](https://www.callstack.com/podcasts/when-coding-gets-faster-what-breaks-next) (Oct 14 · Podcast): Matt Hargett explains how AI moves bottlenecks across testing, deployment, infrastructure, support, and the rest of software delivery. - [MCP and Supervisor Agents in eBay's Monitoring Workflow With Leonel Candido da Silva](https://www.callstack.com/podcasts/mcp-and-supervisor-agents-in-ebays-monitoring-workflow-with-leonel-candido-da-silva) (Oct 13 · Podcast): Leonel Candido da Silva explains eBay's agentic monitoring workflow: specialized agents, MCP, PagerDuty reports, and plans to learn from past incidents. - [AI Agent Observability With Ivana Huckova and Sven Großmann](https://www.callstack.com/podcasts/ai-agent-observability-with-ivana-huckova-and-sven-grossmann) (Oct 12 · Podcast): Grafana's Ivana Huckova and Sven Großmann discuss AI agent observability, coding-agent costs, PR analytics, secret redaction, and local guardrails. - [Automating Mobile QA with Cloud Agents](https://www.callstack.com/events/automating-mobile-qa-with-cloud-agents-2) (Oct 7 · Talk): Michał Pierzchała shows how cloud-based QA agents can test real iOS and Android user flows and bring screenshots, recordings, and logs into pull requests. - [Can Jev Make AI Agent Decisions Faster?](https://www.callstack.com/events/can-jev-make-ai-agent-decisions-faster) (Oct 1 · Live Stream): Explore Jev with Kewin Wereszczyński and Szymon Chmal: how it works, its approach to faster agent decisions, and possible local alternatives. - [The Hard Way vs. The React Native AI SDK Way: Stop Writing Custom Modules for Every Model](https://www.callstack.com/tutorials/the-hard-way-vs-the-react-native-ai-sdk-way-stop-writing-custom-modules-for-every-model) (Mar 19 · Tutorial): Learn how React Native AI uses a unified provider model to switch between cloud and on-device LLMs without rewriting application logic, enabling reliable AI experiences online and offline. - [Build Smarter Apps: Tool Calling & AI Orchestration Explained](https://www.callstack.com/tutorials/build-smarter-apps-tool-calling-ai-orchestration-explained) (Mar 12 · Tutorial): Learn how on-device models in React Native can call tools, interact with external APIs, and return structured outputs you can use directly in application logic. - [MLC LLM + React Native: On-Device AI Without the Pain](https://www.callstack.com/tutorials/mlc-llm-react-native-on-device-ai-without-the-pain) (Mar 5 · Tutorial): Learn how to run third-party on-device LLMs in React Native using MLC LLM. Choose your models, run them efficiently across platforms, and keep a unified JavaScript API with React Native AI. - [Intelligent Fallbacks with Apple Intelligence in React Native](https://www.callstack.com/tutorials/intelligent-fallbacks-with-apple-intelligence-in-react-native) (Feb 24 · Tutorial): Learn how to use Apple’s built-in Foundation Models in React Native apps, reduce memory usage, and enable fast, fully on-device AI with React Native AI Apple. - [What Is the React Native AI SDK? A Complete Intro & Quickstart](https://www.callstack.com/tutorials/what-is-the-react-native-ai-sdk-a-complete-intro-quickstart) (Feb 10 · Tutorial): Learn why on-device AI matters for React Native apps, how local LLMs behave offline, and what problems React Native AI is designed to solve from day one. - [Implementing an Android TurboModule with Kotlin](https://www.callstack.com/tutorials/implementing-an-android-turbomodule-with-kotlin) (Jan 29 · Tutorial): Learn how to implement a React Native TurboModule on Android, from the TypeScript spec and Codegen to the Kotlin implementation and package registration. - [Working with Different Threads in Swift TurboModules](https://www.callstack.com/tutorials/working-with-different-threads-in-swift-turbomodules) (Jan 19 · Tutorial): Learn how JavaScript, native module, background, and main threads interact in React Native TurboModules, and how to use GCD queues to run async work safely in Swift. - [How to Add Type-Safe Constants to Swift TurboModules](https://www.callstack.com/tutorials/how-to-add-type-safe-constants-to-swift-turbomodules) (Jan 9 · Tutorial): Learn how to expose typed, immutable constants from a Swift TurboModule using Codegen, and get full end-to-end type safety between native and JavaScript. - [Adding Event Emitters to Your TurboModule in Swift](https://www.callstack.com/tutorials/adding-event-emitters-to-your-turbomodule-in-swift) (Dec 30 · Tutorial): Learn how to emit native events from a Swift TurboModule and subscribe to them in JavaScript, including proper memory management and Codegen integration. - [Writing Your First TurboModule in Swift](https://www.callstack.com/tutorials/writing-your-first-turbomodule-in-swift) (Dec 22 · Tutorial): Learn how to build a fully working TurboModule in Swift, integrate it with Codegen, and bridge it through Objective‑C inside an Expo app.