Can I use custom native modules with Expo?

Yes. Modern Expo supports custom native code through Config Plugins and the 'prebuild' command, allowing you to modify native iOS and Android projects automatically without permanently locking yourself out of managed workflows.

How do over-the-air updates work in Expo versus React Native CLI?

Expo provides a native, highly integrated OTA update system via EAS Update that works out of the box. React Native CLI requires third-party solutions like Microsoft CodePush (which has maintenance caveats) or custom self-hosted server implementations.

Is it difficult to migrate from React Native CLI to Expo?

Migrating is increasingly straightforward because Expo projects are ultimately React Native projects. By adopting Expo Config Plugins and structuring your native dependencies correctly, you can transition existing codebases without a total rewrite.

Does Expo force you to use their cloud build services?

No. While EAS Build provides convenient cloud runners, you can run Expo builds entirely locally on your own Mac or Linux machines using 'npx expo run:ios' and 'npx expo run:android'.

Expo vs. React Native CLI: A Comprehensive Decision Intelligence Report

Question: Should a mobile app development team use 'Expo' or 'React Native CLI' for cross-platform application builds, considering native module customization constraints, over-the-air update delivery mechanisms, and app store deployment automation.

Prepared by the ChoiceScore Research Desk · Editor-approved for the curated library · Reviewed August 1, 2026

Recommended Choice Score: 82/100

Direct answer

Development teams should choose Expo for accelerated initial velocity, built-in OTA updates, and automated EAS deployments, unless they require deep, highly customized non-standard native modules that strictly preclude the use of Expo Config Plugins.

Summary

Choosing between Expo and React Native CLI is one of the most critical foundational decisions a mobile engineering team can make. Historically, Expo was perceived as too restrictive for complex applications, but modern Expo (with EAS and Config Plugins) bridges the gap by allowing native code customization while retaining the managed workflow's productivity benefits. This report evaluates both options across native module constraints, over-the-air update pipelines, and deployment automation, offering quantitative modeling and strategic guidance for modern cross-platform development.

Choice Score breakdown

Developer Velocity & Maintenance 90/100 — Expo excels in setup speed, libraries, and automated CI/CD pipelines via EAS.
Native Customization Flexibility 75/100 — React Native CLI offers unconstrained raw native project manipulation, though Expo Config Plugins match most needs.
Deployment & OTA Updates 95/100 — Expo provides seamless over-the-air updates and robust cloud build/submission tooling out of the box.

Best for / Not best for

Best for

Startups and enterprises looking to minimize initial build configuration overhead
Teams wanting integrated over-the-air (OTA) JavaScript and asset updates
Projects leveraging automated cloud build and store submission pipelines

Not best for

Teams writing complex custom native C++ or specialized platform bindings without configuration plugins
Legacy brownfield apps with highly customized, fragile native Gradle or Xcode project setups

Scenarios

Expo with EAS (Recommended) (70% likely)
Utilizing modern Expo managed workflow combined with Expo Application Services (EAS) for builds, submissions, and OTA updates.
React Native CLI Bare Workflow (25% likely)
Managing vanilla React Native projects with direct manual control over iOS Xcode workspaces and Android Gradle configurations.
Expo 'Ejected' / Bare Expo Workflow (5% likely)
Using Expo libraries while retaining direct access to generated native folders, occasionally running into synchronization drift.

Calculations

Metric	Result	Formula
Initial Project Setup & CI Pipeline Configuration Time	50 Engineering Hours	base_setup_hours + ci_pipeline_hours - automation_savings
Over-the-Air (OTA) Update Deployment Velocity	1.75 Days Saved per Bug Fix	store_review_days - ota_deployment_hours
Annual DevOps & Build Maintenance Cost	14400 USD/year	monthly_devops_hours * developer_hourly_rate * 12
Native Module Customization Overhead Score	50 Scale Points	standard_modules_weight + custom_plugin_effort

Pros & cons

Pros

Expo provides instant out-of-the-box project scaffolding with zero initial Gradle/Xcode configuration friction.
Integrated Over-the-Air (OTA) update mechanisms allow rapid patching of JavaScript and asset bundles without store review.
EAS (Expo Application Services) automates cloud builds and cross-platform app store submissions seamlessly.
React Native CLI gives absolute, unconstrained access to native Android and iOS source directories for specialized custom modules.

Cons

Expo Config Plugins require learning a specialized configuration model for advanced native library integration.
React Native CLI demands significant manual configuration of CI/CD pipelines, signing certificates, and provisioning profiles.
Upgrading React Native versions can be cumbersome in vanilla CLI setups due to manual diffing of native project files.

Assumptions

Developer Hourly Rate: 80 USD/hr — Standard benchmark rate used for calculating comparative DevOps and engineering maintenance costs.
App Store Review Duration: 2 Days — Average review turnaround time for Apple App Store and Google Play Store submissions.
Expo Ecosystem Maturity: High (SDK 50+) — Modern Expo supports custom native modules via Config Plugins, removing historical limitations of the managed workflow.

Practical next steps

Audit your application requirements to determine if custom native C++ or highly bespoke native SDKs are necessary.
Evaluate team expertise in managing iOS Xcode projects and Android Gradle build systems independently.
Initialize a proof-of-concept project using Expo to test whether existing native dependencies have Expo Config Plugins.
Configure EAS Build and EAS Submit if choosing Expo, or establish GitHub Actions and fastlane pipelines if choosing React Native CLI.
Establish an OTA update strategy (such as Expo Updates) for delivering rapid hotfixes for JavaScript-layer changes.

Methodology

This decision report was formulated by analyzing the architectural trade-offs between Expo and React Native CLI across native customization constraints, OTA update pipelines, and deployment automation. Calculations model engineering setup times, bugfix velocity gains from OTA updates, and DevOps maintenance overhead based on standard industry benchmarks and modern Expo ecosystem capabilities.

Sources

Sources support specific claims; they do not replace our analysis. Read the research and source standards.

FAQ

Can I use custom native modules with Expo?: Yes. Modern Expo supports custom native code through Config Plugins and the 'prebuild' command, allowing you to modify native iOS and Android projects automatically without permanently locking yourself out of managed workflows.
How do over-the-air updates work in Expo versus React Native CLI?: Expo provides a native, highly integrated OTA update system via EAS Update that works out of the box. React Native CLI requires third-party solutions like Microsoft CodePush (which has maintenance caveats) or custom self-hosted server implementations.
Is it difficult to migrate from React Native CLI to Expo?: Migrating is increasingly straightforward because Expo projects are ultimately React Native projects. By adopting Expo Config Plugins and structuring your native dependencies correctly, you can transition existing codebases without a total rewrite.
Does Expo force you to use their cloud build services?: No. While EAS Build provides convenient cloud runners, you can run Expo builds entirely locally on your own Mac or Linux machines using 'npx expo run:ios' and 'npx expo run:android'.

Related decisions

Disclaimers

Technology ecosystems evolve rapidly; specific feature availability for Expo and React Native CLI should be verified against the latest official release documentation.

Cost and time savings estimates are illustrative models and will vary depending on team composition, existing infrastructure, and specific project complexity.