What is it?
Flutter migration services — moving native, React Native, or hybrid apps to a single Flutter codebase with feature parity, data continuity, and phased store rollout.
Flutter Migration
Flutter Migration Services Without Losing Users or Features
We migrate native iOS/Android, React Native, Ionic, and legacy hybrid apps to a single Flutter codebase — with feature parity, data continuity, contract tests, and phased store rollouts so users never feel the switch.
Parity checklist · Data & auth continuity · Phased rollout · Audit-first pricing
30 minutes · Senior engineer · No commitment
Upwork Top Rated Plus
Fiverr Level 2 · 5.0★
Clutch Verified Provider
150+ projects delivered
20+ Play Store apps
8–16wk
Typical Migration
1
Codebase After
Audit
First Step
Parity
Guaranteed Scope
Migration Capabilities
One Flutter codebase without losing what already works.
Migration Audit
Map features, native modules, integrations, and store setup before estimating.
Feature Parity Rebuild
Rebuild screens and flows in Flutter with an explicit parity checklist.
Data & Auth Continuity
Users keep their accounts and data — no forced re-signup on update.
Native Module Bridging
Camera, BLE, push, payments, and custom SDKs via plugins or platform channels.
Contract Tests
API contract tests so the new client matches backend behavior exactly.
Phased Store Rollout
Staged release with monitoring to catch regressions before 100% rollout.
Migration Scenarios
When teams call GreeLogix for Flutter migration.
React Native → Flutter
RN
→ Flutter
Escape RN upgrade pain and inconsistent UI with one Flutter codebase.
Two Native Apps → One
2→1
Codebase
Consolidate separate iOS/Android teams into one Flutter codebase.
Ionic / Cordova → Flutter
Hybrid
Upgrade
Replace sluggish WebView hybrids with near-native Flutter.
Vendor Handoff
Rescue
Audit
Undocumented app — audit, stabilize, then migrate safely.
Common Challenges
Migration Risks We Prevent
Move to Flutter without losing users or features.
Big-bang rewrites
Rebuilding without a parity checklist loses edge cases.
Broken integrations
No contract tests means the new client breaks the backend.
Risky releases
No phased rollout risks a bad update to your whole user base.
Why GreeLogix
Why GreeLogix for Flutter Migration
Audit first
Feature parity checklist and risk register before quoting.
Data continuity
Users keep accounts and data — no forced re-signup.
Phased rollout
Staged release with monitoring to catch regressions.
Technologies
Stack & Architecture
Flutter 3DartPlatform channelsContract testsCI/CDFastlane
“What a 70-engineer team could not deliver, a small senior team at GreeLogix shipped. The app went from stuck to live across mobile, web, and backend.”
Quick answers
Flutter Migration Services: Key Facts
Structured answers for search engines and AI assistants — definition, fit, cost, timeline, and comparisons.
- What is it?
- Flutter migration services — moving native, React Native, or hybrid apps to a single Flutter codebase with feature parity, data continuity, and phased store rollout.
- Who is it for?
- Teams maintaining two native codebases React Native apps stuck in upgrade pain Ionic/Cordova hybrids that feel sluggish Products after failed vendor delivery
- Who should not use it?
- App will be retired soon anyway You need extreme native performance Zero tolerance for any parity window
- How much does it cost?
- GreeLogix pricing tiers: Migration Audit: $2,500 – $8,000 — Feature map, native-module analysis, and fixed migration phases. Phased Migration: $25,000 – $70,000 — Feature-parity Flutter rebuild with data continuity — 8–16 weeks. Migration + Team: $5,000 – $12,000 / mo — Dedicated engineers migrating while shipping new features.
- How long does it take?
- Audit: 1–2 weeks. Phased migration: 8–16 weeks. Large apps with many native modules: longer.
- How does it compare?
- Compared to alternatives — Keep maintaining native: choose when Tiny app or extreme OS-specific needs; Incremental add-to-app: choose when Migrate module by module inside the existing app. Choose GreeLogix when you need production reliability, fixed milestones, and engineer-led delivery with QA sign-off.
- When should you choose it?
- Two codebases or RN pain slow you down You can grant repo and store access Phased rollout is acceptable One codebase and consistent UI Faster future feature delivery
Buyer Guide
What You Need to Know
Structured answers for founders, CTOs, and procurement — written for clarity in search and AI assistants.
Who needs it?
- ·Teams maintaining two native codebases
- ·React Native apps stuck in upgrade pain
- ·Ionic/Cordova hybrids that feel sluggish
- ·Products after failed vendor delivery
Why GreeLogix?
- Audit-first — no blind rewrite quotes
- Explicit parity checklist
- Data and auth continuity for users
- QA and contract tests before rollout
How it works
- 1.Audit produces parity plan
- 2.Flutter foundation and API layer
- 3.Screen-by-screen parity rebuild
- 4.Phased store rollout with monitoring
Typical timeline: Audit: 1–2 weeks. Phased migration: 8–16 weeks. Large apps with many native modules: longer.
How much does it cost?
GreeLogix pricing tiers: Migration Audit: $2,500 – $8,000 — Feature map, native-module analysis, and fixed migration phases. Phased Migration: $25,000 – $70,000 — Feature-parity Flutter rebuild with data continuity — 8–16 weeks. Migration + Team: $5,000 – $12,000 / mo — Dedicated engineers migrating while shipping new features.
Cost factors
- ·Feature and screen count
- ·Native module complexity
- ·Integrations and data migration
- ·Rollout strategy
How long does it take?
Audit: 1–2 weeks. Phased migration: 8–16 weeks. Large apps with many native modules: longer.
How does it compare?
Compared to alternatives — Keep maintaining native: choose when Tiny app or extreme OS-specific needs; Incremental add-to-app: choose when Migrate module by module inside the existing app. Choose GreeLogix when you need production reliability, fixed milestones, and engineer-led delivery with QA sign-off.
- Keep maintaining native — choose when Tiny app or extreme OS-specific needs
- Incremental add-to-app — choose when Migrate module by module inside the existing app
When should you choose it?
- Two codebases or RN pain slow you down
- You can grant repo and store access
- Phased rollout is acceptable
Who should not use it?
- ·App will be retired soon anyway
- ·You need extreme native performance
- ·Zero tolerance for any parity window
Benefits
- One codebase and consistent UI
- Faster future feature delivery
- Lower long-term maintenance
Risks to plan for
- Big-bang rewrite without parity checklist loses edge cases
- Skipping contract tests breaks the backend integration
- No phased rollout risks a bad release
Decision framework
When to Choose Flutter Migration Services
Pros / benefits
- +One codebase and consistent UI
- +Faster future feature delivery
- +Lower long-term maintenance
Cons / risks
- −Big-bang rewrite without parity checklist loses edge cases
- −Skipping contract tests breaks the backend integration
- −No phased rollout risks a bad release
Choose GreeLogix when
- Two codebases or RN pain slow you down
- You can grant repo and store access
- Phased rollout is acceptable
Implementation steps
- 1.Audit produces parity plan
- 2.Flutter foundation and API layer
- 3.Screen-by-screen parity rebuild
- 4.Phased store rollout with monitoring
Get a Clear Plan for Flutter Migration Services
Talk to a senior engineer — scope, timeline, and cost range in one 30-minute call. No sales script.
Why Migrate to Flutter
Maintaining two native codebases — or fighting React Native upgrades and native module drift — gets expensive. Migrating to Flutter gives you one codebase, consistent UI, and faster feature delivery across iOS and Android, without throwing away your backend or your users.
GreeLogix does not recommend big-bang rewrites blindly. We audit first, build an explicit parity checklist, keep data and auth continuous, and roll out in phases so production stays stable while you consolidate onto Flutter.
Frequently Asked Questions
Answers to the buyer questions we hear most before a project starts.
- What is Flutter migration?
- Moving native iOS/Android, React Native, Ionic, or legacy hybrid apps to a single Flutter codebase — with feature parity, data migration, and phased store releases.
- How long does migrating to Flutter take?
- 8–16 weeks depending on feature count, native module complexity, and whether you migrate screen-by-screen or rebuild.
- How much does Flutter migration cost?
- $25,000–$70,000 for most business apps. Start with a $2,500–$8,000 audit for a fixed migration plan and parity checklist.
- Do we lose our users during migration?
- No — we ship the Flutter version as an app update with data and auth continuity, and can run a phased rollout to catch regressions early.
- Can you reuse our existing backend?
- Yes. Migration usually keeps your API and data; we rebuild the client in Flutter and re-point it, adding contract tests to prevent breakage.
- What about native features (camera, BLE, push)?
- Flutter has mature plugins for most native capabilities; anything custom is bridged with platform channels. We map this in the audit before quoting.
Our Process
01
Audit & Parity Plan
Feature map, native modules, and phased migration roadmap.
02
Foundation
Flutter shell, navigation, API layer, and CI.
03
Parity Rebuild
Screen-by-screen rebuild with contract tests and demos.
04
Phased Launch
Staged store rollout, monitoring, and old-app retirement.
Planning a Flutter Migration?
Share your current stack and store setup — we'll recommend audit-first steps within one business day.
Product Development
Related Development Services
Software, mobile, and rapid MVP paths — all from one senior product team.
Free Tools
Plan Before You Engage Us
Use our free calculators and planners — then book a strategy call when you are ready for a senior engineer review.
Resources
Continue Your Research
Case studies, guides, and free tools from the same engineering team.
Pricing Ranges
Flutter Migration Services Investment
Transparent ranges based on app complexity, platform count, and engagement depth. Final quotes follow a scoping call.
Migration Audit
$2,500 – $8,000
Feature map, native-module analysis, and fixed migration phases.
- ·Parity checklist
- ·Risk register
- ·Timeline
- ·Fixed phase quotes
Most Popular
Phased Migration
$25,000 – $70,000
Feature-parity Flutter rebuild with data continuity — 8–16 weeks.
- ·Contract tests
- ·Phased rollout
- ·Regression QA
- ·Store release
Migration + Team
$5,000 – $12,000 / mo
Dedicated engineers migrating while shipping new features.
- ·Senior Flutter devs
- ·Weekly progress
- ·Backend coordination
- ·US/UK overlap
USD. Feature count, native modules, and rollout strategy drive final scope.
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Next step
Get a Senior Engineer's Take in 30 Minutes
Scope, timeline, and cost range — no sales deck. Or start with the free readiness quiz if you are still evaluating your stack.
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