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Native to Cross-platform

Two native apps become one maintainable codebase.

ERPHUBs migrates separate native iOS and Android apps to Flutter or React Native, preserving features, data and user accounts while cutting the cost of maintaining two codebases.

Native to Cross-platformDesigned and delivered by ERPHUBs
Native to Cross-platform at ERPHUBs: ERPHUBs migrates separate native iOS and Android apps to Flutter or React Native, preserving features, data and user accounts while cutting the cost of maintaining two codebases.
50%
is a common aim for reduced duplicated effort
Depends on app complexity
Phased
module-by-module migration
Users keep a working app throughout
Parity tests
automated checks against the old app
Fewer regressions
Why It Matters

Why Native to Cross-platform Needs a Specialist Approach

Two native codebases double cost and slow every feature. Moving to Flutter or React Native can unify them, but only if behaviour, data and users move safely. We migrate in stages so the live app keeps running throughout.

ERPHUBs migrates separate native iOS and Android apps to Flutter or React Native, preserving features, data and user accounts while cutting the cost of maintaining two codebases.

Discuss your project
0data loss targetReconciled at record level
Minutestypical cut-over downtimeWith replication and rehearsals
100%feature parity checkedRegression tests against the old app
Rollbackalways readyTested before the switch
What You Get

What Is Included in Native to Cross-platform

Each deliverable is scoped, reviewed with you and handed over with documentation.

Feature and code inventory

Every screen, API and dependency listed and ranked by risk.

Target architecture

Flutter or React Native structure with shared modules.

Staged module migration

Feature-by-feature moves with both versions in market.

Data and session continuity

Users stay logged in; local data carries across.

Regression test suite

Automated tests proving parity with the old app.

Store update strategy

Same bundle ID and listing so reviews and ranking remain.

Bottlenecks and Fixes

Where Native to Cross-platform Projects Get Stuck, and How We Design Around It

Double maintenance

The bottleneck. Every change is built twice.

How we design it. A single codebase with shared logic and tests.

Target result: 0 data loss target

Feature drift

The bottleneck. iOS and Android diverge.

How we design it. Parity matrix and shared acceptance tests.

Target result: Minutes typical cut-over downtime

Migration risk

The bottleneck. Rewrites lose features or users.

How we design it. Strangler approach: migrate screens gradually inside the existing app.

Target result: 100% feature parity checked

By Industry

Native to Cross-platform: Bottlenecks We Solve, Industry by Industry

Every sector hits different walls. Here is what we see and how we design around it.

Retail

Bottleneck: Seasonal releases are hard to sync.

Our design: Shared catalogue and checkout modules released together.

Banking

Bottleneck: Security must not regress.

Our design: Keep native security modules while moving UI.

Media

Bottleneck: Features land late on one platform.

Our design: Common feed and player components.

Healthcare

Bottleneck: Validated flows cannot break.

Our design: Regression suites against clinical screens.

Migration Risk Control

Migration Risks and How We Remove Them

Migrations fail in predictable ways. We plan for each one before the first record moves.

Data loss or corruption

The risk. Records are altered or dropped during transfer.

Our safeguard. Checksums, record counts and sampled comparisons at every trial load.

Extended downtime

The risk. Users locked out during the switch.

Our safeguard. Continuous replication and a rehearsed, time-boxed cut-over.

Feature regressions

The risk. Behaviour differs from the old app.

Our safeguard. Automated regression suite and side-by-side user acceptance tests.

Lost reviews and users

The risk. Store changes reset ratings or break updates.

Our safeguard. Same bundle IDs, transfer-safe processes and staged rollouts.

Security gaps

The risk. New environment is configured loosely.

Our safeguard. Hardened landing zone, secrets management and access reviews.

Cost overruns

The risk. Cloud or licence costs exceed forecasts.

Our safeguard. Right-sizing, budgets and alerts from the first week.

Sign-off Checklist

How We Prove the Native to Cross-platform Worked

Nothing goes live on trust. Each item below is checked, recorded and signed off with you before cut-over.

  • Record counts match between source and target for every table
  • Checksums and sampled records compared for critical entities
  • All integrations and webhooks re-tested end to end
  • User accounts, roles and permissions verified
  • Performance matches or beats the old system under load
  • Backup and restore tested on the new environment
How We Deliver

A Five-Step Delivery Path

  1. 1AssessInventory of code, data, dependencies and users.
  2. 2PlanTarget architecture, mapping and rollback plan.
  3. 3MigrateStaged moves with automated checks.
  4. 4ValidateReconciliation and parallel run.
  5. 5Cut overSwitch, monitor and retire the old system.
Typical stackFlutterReact NativeKotlin/SwiftCI/CDTest automation
Standards We Build To

Quality, Security and Compliance in Native to Cross-platform

Record-level reconciliation

Counts, checksums and samples compared between old and new.

Rehearsed cut-over

At least one full dress rehearsal before go-live.

Security and compliance

Encrypted transfer, access control and audit logs.

User continuity

Accounts, sessions and settings carried across.

Planning

What Affects Timeline and Cost in Native to Cross-platform

Typically 4 to 16 weeks depending on size, data volume and downtime limits.

Size and age of the system

Older, larger systems need deeper discovery.

Data volume

Large datasets need staged or replicated loads.

Downtime tolerance

Zero-downtime plans add engineering effort.

Third-party dependencies

Every library and integration must be replaced or re-tested.

Engagement Models

Ways to Work With ERPHUBs

Fixed-scope project

A clear scope, timeline and price for well-defined work.

Dedicated team

A named squad that works as part of your team month to month.

Support retainer

Ongoing fixes, updates and monitoring after launch.

Use Cases

Where Native to Cross-platform Delivers the Most Value

Typical situations where clients bring us in, and what we design for each.

Two codebases, one team

Merge duplicated iOS and Android work into one project with shared logic.

Feature parity first

Rebuild screen by screen and compare behaviour before users switch.

Staged rollout

Release to a small percentage, watch crash rates, then widen.

Keeping reviews and users

Preserve bundle IDs, ratings and installs through the switch.

Tools and Technology

How We Build Native to Cross-platform

Assessment tooling

Code, data and dependency scans that size the work before quoting.

Data migration

Scripted extraction, mapping and validation with repeatable dry runs.

Parallel testing

Old and new systems tested against the same cases and datasets.

Cut-over controls

Freeze windows, rollback plans and live monitoring on go-live day.

Success Metrics

How We Measure Native to Cross-platform Results

We agree measurable targets up front and report against them.

Data reconciliation

Record counts and balances matched between old and new systems.

Downtime

Planned cut-over windows measured in minutes where possible.

Defects after go-live

Open critical issues at day 7 and day 30.

User adoption

Logins and task completion compared with the old system.

Before You Decide

Questions to Settle Before Starting Native to Cross-platform

Will users lose data or access?

Dry runs and reconciliation reports prove nothing is lost before cut-over.

How long will we be offline?

We plan the shortest safe window and rehearse it.

What if something goes wrong?

A tested rollback path is part of every migration plan.

Do you handle store and account details?

Yes, including bundle IDs, certificates and compliance forms.

After Launch

Support, Maintenance and Handover

Monitoring and fixes

Uptime, errors and performance watched, with fixes under agreed response times.

Updates and security

Dependencies, platforms and security patches kept current.

Enhancements

A monthly pool of hours for improvements, prioritised with you.

Training and handover

Documentation, recordings and sessions so your team stays independent.

FAQ

Native to Cross-platform, Answered

Will users need to reinstall?

No. We ship updates through the same store listings.

Can we migrate gradually?

Yes. Module-by-module migration is our default for lower risk.

Is cross-platform slower?

Modern Flutter and React Native perform well for most apps; we profile critical screens.

How much does Native to Cross-platform cost?

Cost depends on scope, integrations, compliance needs and the number of users or pages. After a short discovery we give a fixed or phased quote with clear milestones, so you can compare it with other options.

How long does Native to Cross-platform take?

Typically 4 to 16 weeks depending on size, data volume and downtime limits.

What support do you provide after Native to Cross-platform goes live?

We offer support retainers covering fixes, updates, monitoring and enhancements, plus a handover with documentation and training so your team is never locked in.

Start the conversation

Tell us about your Native to Cross-platform project

Share your goal and constraints. A senior consultant replies with questions, options and a scoped quote.

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