Expo Development Services
Build, sign and update apps without the store queue
ZingZee builds its React Native apps on Expo, which takes the native build, the code signing, the store submission and over-the-air updates off the client's engineers. A fix to a screen reaches every installed phone in minutes, and only changes to native code wait for review.
What Expo is
ZingZee's Expo development services cover the release pipeline around a React Native app: the native project for iOS and Android, a build service that compiles and signs the app in the cloud, a submission service for both stores, and an update service that delivers changes to installed phones without a store review. A developer merges a change, the build service produces signed binaries with no Mac on the desk, and the update service pushes interface and logic changes to phones already in the field within minutes. Changes to native code, permissions, or identifiers go through store review in the normal way. For a business owner, Expo matters because it turns a mobile release into a process a small team can run every week.
What we do with Expo
Expo is the toolchain ZingZee uses around React Native. It provides the native project for iOS and Android, a build service that compiles and signs the app in the cloud, a submission service for both stores, and an update service that delivers JavaScript changes directly to installed apps.
The practical effect is a release process a small team can run. A developer merges a change, the build service produces signed binaries without a Mac on the desk, and the update service pushes interface and logic changes to phones already in the field. Native changes, such as a new permission or a new hardware module, go through store review in the normal way.
ZingZee configures the client's own Expo account, store credentials and update channels, so staging phones receive a change before customers do and a bad update can be rolled back from a dashboard. The app reads the platform API shared with the web front end, and the whole pipeline is documented for handover.
When Expo is the right choice
Expo is the right choice for every React Native app ZingZee builds, because it removes four separate tools a team would otherwise run: native builds, code signing, store submission, and updates. It is the right choice for a customer app whose offers, content, and flows change weekly, since those changes ship over the air without waiting on review each time. It suits a staff app rolled out in stages, where a change goes to a staging channel, then to a pilot team, then to everyone, with rollback at each step. It suits a client whose own developer will ship releases without native build expertise, and it suits a stalled React Native app whose releases have become unrepeatable. ZingZee sets the pipeline up under the client's own accounts from the first build.
When Expo is the wrong choice
Expo is the wrong choice for a native Swift or Kotlin app, which has its own build pipeline through Xcode and Gradle, and for a Flutter app, which ships through its own toolchain. It is the wrong choice for an installable web app, which needs no store pipeline at all, because a deployment reaches every phone on the next page load. It is the wrong answer to a slow app whose delay sits in the platform API behind it, since a faster release pipeline ships the same delay sooner. ZingZee's assessment records how the app is released today and proposes Expo where a React Native app and a small team make the case.
Why Expo
Over-the-air updates
Fixes and new screens reach installed apps without a store submission, on a channel the client controls, with rollback in one action.
Cloud builds and signing
The build service compiles and signs iOS and Android binaries, so no engineer needs a Mac or a local certificate store.
Store submission from the pipeline
Builds are submitted to App Store Connect and Google Play from the command line, with TestFlight and testing tracks fed automatically.
Managed native modules
Camera, location, notifications, secure storage and file access come as maintained modules, and custom native code is added through config plugins.
Preview builds for reviewers
A client stakeholder installs a preview build from a link and sees the change on their own phone the same day.
Build, sign and update apps without the store queue
Use cases
Customer apps that change weekly
Offers, content and flows updated over the air without waiting on review each time.
Staff apps rolled out in stages
A change goes to a staging channel, then to a pilot team, then to everyone, with rollback at each step.
Apps maintained by a small team
A client's own developer ships releases from the pipeline without native build expertise.
Pilot and demo builds
Stakeholders install a preview from a link during the build, so review happens on real phones.
Rescuing a stalled React Native app
An existing app moved onto Expo's build and update services to make releases repeatable.
Expo development services
ZingZee provides.
Pipeline set-up for new React Native apps
ZingZee configures the client's Expo account, store credentials, build profiles, and update channels, so staging phones receive a change before customers do and a bad update rolls back from a dashboard in one action.
Migration of an existing React Native app onto Expo
An app with manual builds and irregular releases is audited for its native project, dependencies, and signing, then moved onto Expo's build, submission, and update services with the release process documented.
Over-the-air update channels and staged rollout
Channels for staging, pilot, and production, with a change promoted through each and rolled back at any step, kept within the store guidelines so only native changes wait for review.
Cloud builds, signing, and store submission
Signed iOS and Android binaries produced in the cloud, submitted to App Store Connect and Google Play from the pipeline, with TestFlight and Play testing tracks fed automatically.
Native modules through config plugins
Camera, location, notifications, secure storage, and file access from maintained modules, with custom native code added through config plugins so the app stays on the managed workflow.
Expo development scope
- Deliverables
- The Expo project in the client's repository, with the EAS build, submit, and update configuration, the channel layout, the config plugins for native code, and the first releases through both stores.
- Included as standard
- Preview builds by link, crash reporting wired into monitoring, a rollback rehearsed on staging, a written release procedure, staging, pilot, and production channels, and a recorded handover with the client's developer shipping a release.
- Migration artefacts
- On an existing app, ZingZee delivers the audit of the native project, the list of custom code moved into config plugins, and a side-by-side release showing the app unchanged.
- Priced separately
- The app itself where it is new, native modules beyond the config plugins, additional environments after the first three, and store listing design are scoped and quoted as separate items.
- What the client provides
- Apple and Google developer accounts, an Expo account in the client's name, signing certificates or authority to create them, test devices, and the developer who will ship releases after handover.
- Outside the engagement
- Expo and EAS subscriptions, store developer fees, and push provider accounts are the client's to hold. ZingZee configures each one on the client's account, so nothing depends on ZingZee's credentials.
How an Expo pipeline with ZingZee runs
An Expo pipeline with ZingZee runs through the five-phase delivery framework. The strategic assessment records how the app is built and released today, who ships releases, how often the app changes, and the store accounts in place. The AI roadmap fixes the channels and the release cadence. Integration and deployment wires the build, submission, and update services to the client's accounts and runs the first releases through them. Adoption and enablement trains the client's developer on the runbook until a release ships without ZingZee in the room. Governance, optimisation and scale covers releases, update health, and framework upgrades afterwards. Each phase opens with a scoping workshop and closes with a hardening workshop, where a release is run end to end including a rollback, and a delivery workshop, where the client's staff sign it off.
- Strategic assessment
- AI roadmap
- Integration and deployment
- Adoption and enablement
- Governance, optimisation and scale
Industries where ZingZee applies Expo
ZingZee applies Expo development services wherever a React Native app is in the plan: in travel and hospitality, where a guest app's offers and content change with the season and ship over the air; in retail and distribution, where a customer ordering app changes weekly and a staff app rolls out in stages; in financial and professional services, where a client app must reach staging phones before customers see a change; and in companies with a single in-house developer who ships releases from the pipeline without native build expertise.
Expo tooling
ZingZee's Expo work uses one set of tools on every project, so a client who reads about a customer app can expect the same on a staff app. The tooling covers:
- Expo on the current SDK with React Native and TypeScript throughout
- EAS Build for cloud compilation and signing of iOS and Android binaries
- EAS Submit for store submission with TestFlight and Play testing tracks fed automatically
- EAS Update with channels for staging, pilot, and production and rollback in one action
- Config plugins for custom native code on the managed workflow
- Preview builds by link for stakeholders, and crash reporting wired into the platform's monitoring
Expo engineering practices
Every Expo pipeline ZingZee ships lives under the client's own Expo account, store credentials, and update channels from the first build. A change reaches a staging channel before a pilot team and a pilot team before everyone, and every step can be rolled back from a dashboard. Over-the-air updates stay within Apple's and Google's guidelines, so JavaScript and asset changes ship directly and anything that changes native behaviour goes through a store release. Custom native code is added through config plugins, so the app stays on the managed workflow and SDK upgrades remain routine. A release is rehearsed end to end, including a rollback, before handover. At handover the client receives the pipeline configuration, the channel definitions, the credentials under its own accounts, and a runbook for over-the-air and store releases.
Cost and time for an Expo pipeline
The cost of an Expo pipeline depends on whether the app is new or existing, the state of an existing app's native project and dependencies, the number of channels and environments, the custom native modules in use, and the store accounts already in place. A pipeline for a new React Native app is set up within the app's build and priced within it. Migration of an existing app with manual builds onto Expo is a matter of weeks, longer where custom native code must be moved into config plugins. Training the client's developer to ship releases is included in the adoption phase. ZingZee provides a written estimate after the strategic assessment and phases the budget to the client's priorities.
What happens next?
You describe the app, how often it changes, and who ships releases today.
An engineer reads it and replies within two working days with the shape of a strategic assessment.
You sign a non-disclosure agreement if you need one, and you receive a proposal with the phases, the estimate, and the team.
Frequently asked questions
Straight answers on Expo work with ZingZee.