migrate

live

Assess My Codebase

Stacks we've retired

Migrated to Flutter

Xamarin.Forms

React Native

Swift / SwiftUI

Kotlin / XML

Apache Cordova

Ionic Framework

→ Flutter

→ Dart 3.x

Xamarin.Forms

React Native

Swift / SwiftUI

Kotlin / XML

Apache Cordova

Ionic Framework

→ Flutter

→ Dart 3.x

Production telemetry — liveLast updated: 09:01 AM

Legacy code
retired.
Flutter ships.

2.4M

Lines migrated

across 47 production apps

Rollbacks

in 3 years of migrations

68%

Avg. build time reduction

iOS + Android combined

$2.1M

Maintenance savings

median enterprise client / yr

migrate-cli v2.4.1 — production

$ migrate init --source=xamarin --target=flutter

✓ Analyzing dependency graph...

✓ Mapping 847 UI components...

✓ Generating Flutter widget tree...

✓ Migrating business logic layer...

✓ Running parallel test suite...

✓ Zero breaking changes detected.

✓ Deploy ready. No downtime incurred.

01 / migration scenarios

click any row to interrogate

Migration
data grid

Migration Path

Lines of Code

Build Time

Test Coverage

Cost Savings

Complexity

Xamarin.Forms

→Flutter 3.x

47K → 28K

-40%

4m 12s → 1m 38s

-61%

41% → 87%

+46pp

$840K/yr

14 weeks

High

FinOps SaaS — Chicago, IL

Migrated a 6-year-old Xamarin.Forms enterprise app with 230+ screens. Eliminated dual iOS/Android native modules. Achieved single-codebase deploy with identical UX parity.

Lines of Code

47K→ 28K

-40% reduction

Build Time

4m 12s→ 1m 38s

-61% reduction

Dependency map — Xamarin.Forms → Flutter 3.x

React Native 0.68

→Flutter 3.x

62K → 39K

-37%

6m 55s → 2m 10s

-69%

38% → 79%

+41pp

$1.2M/yr

18 weeks

High

Series B Logistics — Austin, TX

Replaced a React Native bridge-heavy architecture with Dart-native code. Removed 34 native modules. Metro bundler replaced by Dart AOT compilation — 69% faster CI.

Lines of Code

62K→ 39K

-37% reduction

Build Time

6m 55s→ 2m 10s

-69% reduction

Dependency map — React Native 0.68 → Flutter 3.x

SwiftUI + UIKit

→Flutter 3.x

38K → 22K

-42%

3m 40s → 1m 22s

-63%

52% → 91%

+39pp

$620K/yr

12 weeks

Medium

HealthTech Startup — San Francisco, CA

iOS-only app expanded to Android in the same migration sprint. SwiftUI declarative patterns translated cleanly to Flutter widget composition. Android launch = 0 additional dev cost.

Lines of Code

38K→ 22K

-42% reduction

Build Time

3m 40s→ 1m 22s

-63% reduction

Dependency map — SwiftUI + UIKit → Flutter 3.x

Kotlin + XML Layouts

→Flutter 3.x

55K → 31K

-44%

5m 28s → 1m 55s

-65%

29% → 83%

+54pp

$980K/yr

16 weeks

Medium

Enterprise HR Platform — New York, NY

Android-only Kotlin app with Gradle complexity replaced. 18 Gradle modules collapsed to a single Flutter package tree. iOS shipped 6 weeks post-migration without additional resourcing.

Lines of Code

55K→ 31K

-44% reduction

Build Time

5m 28s→ 1m 55s

-65% reduction

Dependency map — Kotlin + XML Layouts → Flutter 3.x

Apache Cordova

→Flutter 3.x

71K → 35K

-51%

8m 10s → 1m 48s

-78%

18% → 76%

+58pp

$1.5M/yr

20 weeks

High

Global Retail — London, UK

WebView-wrapped Cordova app with 11 Cordova plugins replaced with native Flutter packages. Eliminated WebView performance bottleneck. FPS improved from avg 28fps to stable 60fps.

Lines of Code

71K→ 35K

-51% reduction

Build Time

8m 10s→ 1m 48s

-78% reduction

Dependency map — Apache Cordova → Flutter 3.x

All metrics represent production migrations. Client names withheld under NDA — full references available on request.

02 / case studies

Production evidence

FinOps SaaS

$840K saved in year one

A Chicago fintech running Xamarin.Forms since 2018 migrated 47K lines in 14 weeks. Their iOS and Android teams of 6 collapsed to a Flutter team of 3.

−40%

LOC Reduction

3 FTE

Engineers freed

Series B Logistics

69% faster CI/CD pipeline

Austin logistics startup replaced a React Native bridge-heavy app. 34 native modules removed. Metro bundler out, Dart AOT in.

−69%

Build Time

34 → 0

Native modules

HealthTech Startup

iOS-only → iOS + Android in 12 weeks

San Francisco healthtech expanded to Android in the same migration sprint. $0 additional platform cost.

Platforms added

12 wks

Timeline

Enterprise HR Platform

18 Gradle modules → 1 Flutter package

New York HR platform collapsed a sprawling Kotlin/XML codebase. iOS shipped 6 weeks post-migration with zero additional resourcing.

$980K/yr

Cost savings

+54pp

Test coverage

The Migration Playbook — 48-page technical guide

Architecture patterns, dependency maps, and risk frameworks from 47 production migrations.

03 / migration calculator

What is your tech debt
costing you right now?

Adjust the inputs below. The model uses maintenance overhead ratios from 47 production migrations.

Input parameters

Current framework

Codebase size100–250K lines

<10K>1M

Mobile engineering team size5 engineers

130

Avg. engineer salary (USD)$140K

$60K$280K

Estimated annual savings post-migration

$356K

Payback period: 7 months

Savings breakdown

Maintenance overhead reduction$108K

CI/CD build time saved$144K

Platform expansion (zero cost)$105K

Estimated migration investment

$200K

One-time. Includes full codebase audit, migration, testing, and 90-day post-launch support.

Assess My Codebase — Get Exact Numbers

04 / codebase assessment

Assess my codebase

We respond within one business day with a free complexity score, estimated timeline, and migration cost range — no sales call required.

Legacy coderetired.Flutter ships.

Migrationdata grid

Production evidence

$840K saved in year one

69% faster CI/CD pipeline

iOS-only → iOS + Android in 12 weeks

18 Gradle modules → 1 Flutter package

What is your tech debtcosting you right now?

Assess my codebase

The Migration Playbook

Legacy code
retired.
Flutter ships.

Migration
data grid

What is your tech debt
costing you right now?