Flutter builds iOS and Android apps, and other screens, from one codebase written in Dart.
Salesforce Select Partner · 15+ years of team experience · Delaware and Sydney
Flutter app development for design-heavy apps on iOS and Android.
We build Flutter apps from one Dart codebase, take over Flutter apps other teams wrote, and bring older Flutter, native and Xamarin apps onto the current stable release.
See how it works
- 15+Years of team experience
- 3Ways to engage: project, team or extension
- 60 minFree Flutter app development review, with a written plan
- 5.0/5Client satisfaction (CSAT)
Proven Success With
5.0/5 CSAT
New to Flutter app development?
What is Flutter app development?
We build branded consumer apps, fintech apps, kiosk screens and internal tools, and upgrade older Flutter apps.
Work runs as a fixed-scope project, a dedicated team or Flutter engineers who join your team.
Starting point
Where are you with Flutter?
What does your app look like today?
- Path 01Nothing built yet
A new Flutter app
You need a branded app on iOS and Android, built and released by one team.
- Design system set up in Flutter first
- State management chosen early
- Release pipeline to both stores from the start
- Path 02We inherited an app
Taking over an existing Flutter app
An agency or former team built it, and updates have slowed or stopped.
- Code, package and build review
- Tests added around key flows
- A written report and a plan
- Path 03It is out of date
Upgrading or modernizing
The app runs on Flutter 2, or you run separate native or Xamarin apps.
- Dart code moved to sound null safety
- Packages updated or replaced
- Native or Xamarin screens rebuilt in Flutter
One Flutter app on the current stable release that ships to both stores
What we do
What do our Flutter app development services include?
Build, take over, upgrade and staff Flutter work with one mobile team.
New iOS and Android apps
01Branded consumer apps and two-platform MVPs from one Dart codebase.
Fintech and banking apps
02Secure sign-in, account screens and payments built to your security rules.
Kiosk and embedded screens
03Flutter interfaces for kiosks, terminals and devices.
Flutter upgrades
04Flutter 2 apps moved to sound null safety and the current stable release.
Native and Xamarin rebuilds
05Two native apps, or a Xamarin app, rebuilt as one Flutter app.
Testing and release
06flutter_test suites and Codemagic or Fastlane pipelines to both stores.
Salesforce integration
07Flutter apps that read and write Salesforce data over its APIs.
Flutter team extension
08Flutter engineers who join your team and work in your process.
Stack
The Flutter stack we work with
Flutter and Dart, with the packages and pipelines most production apps use.
- Flutter
- Dart
- pub.dev
- Riverpod
- Bloc
- Provider
- Dio
- Firebase
- FlutterFire
- REST APIs
- flutter_test
- Codemagic
- Fastlane
Upgrades
How do you upgrade an old Flutter app?
Flutter ships stable releases each quarter, with 3.47 as the current line, and has no LTS. Dart 3 requires sound null safety, so older code has to move first.
TodayFlutter 2, or separate native or Xamarin apps
- Sound null safety
Migrate the Dart code
Move the app and its packages to sound null safety, replacing packages that never moved.
Dart 3 requires sound null safety, so this comes first.
- Flutter 3.47
Move to the current stable
Upgrade to the current stable release and set a plan to follow each quarterly release.
Flutter has no LTS line, so fixes arrive in new stable releases.
- Flutter
Rebuild native or Xamarin apps
Rebuild separate iOS and Android apps, or a Xamarin app, as one Flutter app.
Fits teams maintaining two codebases for the same features.
Engagement
How can you work with our Flutter engineers?
Three ways to engage. Each one is agreed in a written proposal before work starts.
- Fixed-scope project
We deliver a defined app, rebuild or upgrade.
- SynconAI directs the work to agreed milestones
- Billed by milestone, as set out in the proposal
- A released app, tests and documentation
- Fits an MVP, a rebuild or an upgrade
- Dedicated team
A Flutter team that works only on your app.
- You set priorities, our lead runs the team
- Billed monthly for the team
- Engineers, a lead and testing as needed
- Fits an app with regular releases
- Team extension
Flutter engineers who join your team.
- Your managers direct the day-to-day work
- Billed monthly for each engineer
- Vetted engineers, with employment and replacement handled by us
- Fits teams with a working process that need more hands
Process
How does a Flutter engagement start?
Five steps from the first call to an app in the stores.
- Brief
- Call about your app and users
- Designs, repository or a written scope
- Match or design
- Engineers matched to your app
- Plan and proposal in writing
- Start
- NDA, store and repository access
- Codebase walkthrough and a first task
- Build and review
- Test builds on real devices
- Demos and code review with your team
- Hand over or continue
- Store release and a handover session
- Or a monthly plan for ongoing releases
Cost and timing
What it costs and how long it takes
The review is free
A 60-minute architecture review of your Flutter app setup, with a written plan you keep.
A fixed-scope proposal first
Before any work starts you get a written proposal: a fixed-scope project with milestones, or a monthly plan. You approve it, or you do not.
Timing follows scope
How long it takes depends on what is in scope. The proposal states the milestones, so you see the timeline before you commit.
Client stories
Client work we have delivered
Real engagements, described by industry. Each story covers the starting position, what we built and how we delivered it, end to end.
Commercial & Business ServicesA Subscription Estimator and Technical Library for Fire Protection ProfessionalsA Next.js web application for a fire protection business: a searchable technical library and estimator with role-based access, manufacturer filtering, PDF output and subscriptions, with AI product identification in development.Next.js · Custom web application · Authentication and roles · SubscriptionsRead the story 
Communications, Media & TechnologyA Bilingual Knowledge Base That Answers Callers During a Major International EventA bilingual English and Japanese knowledge base for contact centre operators at a major international event: live answer suggestions, cross-language search with translated embeddings, operator content management and missing-question tracking.Custom AI · Vector search · Translated embeddings · Large language modelsRead the story 
EducationOne Tutoring Calendar Across Salesforce and TeachWorksSalesforce development for an Australian tutoring provider: a custom session calendar, two-way TeachWorks appointment sync, attendance and completion mapping, and session notes into after-session reports.Salesforce Platform · Lightning Web Components · Apex · TeachWorks APIRead the story Client reviews
What clients say about working with our architects
See how teams describe working with SynconAI, from first scope to production delivery.
Salesforce Select Partner30+ Salesforce certificationsDelivery from Delaware & Sydney, worldwide
Simply Outstanding
“SynconAI Consulting are Simply the Best in the Business When it comes to Salesforce implementation and AI-powered solutions, SynconAI are in a league of their own. Their expertise, dedication, and ability to deliver results that truly move the needle sets them apart from every other consulting partner we've worked with. What they achieved with our Sales Cloud, Service Cloud, and custom Agentforce agent has completely transformed how we operate streamlining our pipelines and our customer service, and automating tasks that used to consume hours of our team's time. They don't just implement technology they transform businesses. If you want the best, you work with their team.”
Sales CloudService CloudAgentforce
Jack BennettConsumer Goods & Retail · United States
“I had a very urgent deadline for our project reporting to be delivered and needed to build the module, dashboard and output reports in Salesforce. SynconAI were very responsive - they met with me online, responded to my emails quickly and took calls - whatever was needed to progress the work quickly. We are thrilled with the outcome and will continue to work with SynconAI in the future to continue to build our Salesforce capability and platform.”
Sales CloudService CloudNonprofit Cloud
Salesforce Managed ServicesAustraliaSalesforce Verified
“The team at SynconAI were fantastic, and promptly delivered on each project. They were able to guide us through every stage and made sure we were satisfied with the outcomes on multiple scopes of work.”
Sales CloudSlackFlowAgentforceMuleSoft
ManufacturingAustraliaSalesforce Verified
“They have been great and helping us transform out business by bringing what I conceptualize to life. Great at translating process/workflow needs into a solution. Been a pleasure work with and they're a critical part of our team and will be instrumental into bringing about my vision.”
Sales CloudFinancial Services CloudArchitectureAI
Financial ServicesUnited StatesSalesforce Verified
“Working with SynconAI was a seamless and highly professional experience from start to finish. They took the time to deeply understand our business processes before designing and implementing a Salesforce solution tailored specifically to our operational needs. The team demonstrated strong technical expertise across Salesforce configuration, automation, integrations, reporting, and user experience design.”
SalesforceExperience CloudCustom DevelopmentAutomationReporting
Salesforce ImplementationSalesforce Verified
Frequently asked questions
Flutter app development, answered.
Straight answers about Flutter apps, upgrades, engineers and how the work runs.
Building and supporting apps with Flutter and Dart. We build consumer apps, two-platform MVPs, fintech and banking apps, kiosk screens, internal tools and design-heavy branded apps.
If it is on Flutter 2, yes. Dart 3 requires sound null safety, and Flutter has no LTS line. We migrate the code, then move it to the current 3.47 stable line.
As a fixed-scope project with milestones, a dedicated team, or engineers who join your team. Scope, people and billing are agreed in a written proposal before work starts.
Yes. They work in your repositories, standups and code review, and your managers direct the work. We handle their employment and any replacement.
Each engineer goes through a technical interview on Flutter and Dart, a practical code task and a review with a SynconAI lead. You can interview them before they start.
Yes. It connects through Salesforce APIs: the REST API, with OAuth 2.0 for user sign-in, called from the app or from a back end you control.
Our hubs in Delaware and Sydney cover United States and Australian working hours, and we deliver remotely worldwide on your business hours. Overlap hours with your team are agreed before work starts.
Flutter, Dart, Firebase and Google Play are trademarks of Google LLC. App Store is a trademark of Apple Inc. Salesforce is a trademark of Salesforce, Inc. Other names are trademarks of their owners. SynconAI is an independent consulting firm and is not affiliated with or endorsed by these organizations.
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