Flutter Mobile App Development for iOS and Android

Flutter app development is building iOS, Android, web, and desktop apps from one Dart codebase, using Google’s Flutter toolkit and its own rendering engine. Syndell helps founders, product managers, and CTOs launch one app on iOS and Android without doubling the team, and rescues Flutter projects that have stalled or slipped.

Tell Us About Your Project

Share a few details about what you want to build.

12+

Years of Experience

1539+

Projects Delivered

20+

Countries from 5 Continents

618+

Clients Served

Trusted by Industry Giants, Enterprises, and Startups

When Clients Call Us Urgently

If one of these sounds familiar, this is where we step in.

We start with an audit of the code, packages, and build pipeline, so you know whether to fix, upgrade, or rebuild.

The App Stutters on Older Phones

Jank usually comes from heavy widget rebuilds, oversized images, or work on the UI thread. We profile with Flutter DevTools, fix the worst screens first, and test on real mid-range devices. Stuttering apps get uninstalled and rated down.

You Are Stuck on an Old Flutter or Dart Version

Upgrades stall when packages fall behind. We list the breaking changes, move you up in stages, and replace abandoned packages. Until then, new features and store requirements keep piling up.

A Plugin You Depend on Is No Longer Maintained

We check the package’s history, look for a maintained alternative, or write a platform channel. One dead package can freeze your whole release plan.

iOS Builds or Store Submissions Keep Failing

Signing, provisioning, and privacy declarations trip up many teams. We fix the build pipeline, read the rejection notes, and resubmit. Each failed submission delays launch day.

Flutter App Development Services

Six areas of Flutter application development we handle, for new apps and existing ones.

Custom Flutter Apps

B2C engagement apps, internal tools, and asset-tracking apps for iOS and Android, built from one Dart codebase.

Architecture and Consulting

Architecture reviews, state-management choices such as Riverpod or Bloc, and a project structure a growing team can follow.

API and Back-End Integration

Connect Flutter to REST or GraphQL services, Firebase, or a Node.js or Laravel back end, with offline handling.

Real-Time and AI Features

Live updates, chat, and notifications using WebSockets, Firebase, and push services, plus AI features such as chat assistants or on-device models where the product needs them.

Migration and Upgrade

Move native or older cross-platform apps to Flutter, or bring an existing Flutter app up to current Flutter and Dart.

Testing, Maintenance, and Support

Widget and integration tests, crash monitoring, OS-update fixes, and new features after launch.

Need Flutter Engineers in Your Own Team?

See Hire Flutter Developers

Why Build a Mobile App With Flutter?

One Codebase, More Than One Platform

Flutter, Google’s UI toolkit, targets iOS, Android, web, and desktop from one Dart codebase.

The Same Look Everywhere

Flutter draws its own interface with its rendering engine, so screens look identical across devices and OS versions.

Fast Iteration

Hot reload shows code changes in a running app within moments, which speeds up design reviews and bug fixes.

Compiled Performance

Dart compiles to native code for release builds, which keeps animations smooth on modest hardware.

Flutter vs Native vs Progressive Web App

Flutter

Native iOS and Android

Progressive Web App

Codebases

Flutter

One

Native iOS and Android

Two

Progressive Web App

One

Store Presence

Flutter

App Store and Google Play

Native iOS and Android

App Store and Google Play

Progressive Web App

Browser Install, Limited Store Presence

Device Features

Flutter

Broad, Through Plugins and Native Code

Native iOS and Android

Full, from Release Day

Progressive Web App

More Limited, Especially on iOS

Best Fit

Flutter

One Team, Consistent UI Across Platforms

Native iOS and Android

Deepest Platform Integration, Heavy Graphics

Progressive Web App

Lightweight Tools That Live in the Browser

Comparing Flutter with React Native? See our React Native app development page.

Want a Plain Recommendation for Your App?

We will give one after a short call.

How a Flutter App Gets Built

Scope and Platform Targets

We define users, features, target platforms, and which native features you need.

Design in Flutter Widgets

Screens follow Material and Cupertino conventions where they help, or your brand system, with a clickable prototype you approve.

Build in Sprints

Each sprint ends with a test build on TestFlight and Google Play internal testing.

Test and Profile

Widget and integration tests, checks on real devices, and performance profiling with Flutter DevTools.

Release and Support

We prepare store listings and submissions, monitor crashes, and stay on for updates.

Bring your app idea or existing code and we will map it to these steps.

Case Studies

Clutch Up

Esports / Fantasy Gaming

Esports tournaments move fast, and fans follow them from their phones, not a desk. The Clutch Up mobile app puts the fantasy format in their pocket, letting players draft rosters, follow live tournament scoring, and check how their picks are performing as matches unfold, from the first game to the final.

Mobile App DevelopmentPlayer DraftingLive Tournament DataPerformance-Based Scoring

Read Case Study

38%Increase in Contests Created

29%Increase in Active Weekly Users During Tournament Windows

41%Reduction in Data Lag

Holistic Wellcare Advisers

HealthTech / Wellness Marketplace

Wellness sessions rarely happen at a desk. The HWA mobile app brings the practitioner and client experience to a phone, letting clients browse packages and book at-home, virtual, or in-person sessions while practitioners manage availability, bookings, and package payments wherever their day takes them, between sessions or on the road.

Mobile App DevelopmentSession BookingPackage & Payment TrackingPractitioner & Client Experience

Read Case Study

100%CONFLICT-FREE BOOKING

24/7SELF-SERVE BOOKING, NO CALLS NEEDED

100%AUTO-SYNCED GOOGLE & OUTLOOK CALENDARS

Zoundslike

EdTech / AI Language Learning

Zoundslike does the hard part well – AI-powered, game-based English practice paired with live peer-to-peer speaking sessions. The platform wasn’t carrying its weight: core flows were incomplete and unstable, no mobile app existed yet, and unresolved audio issues undermined the entire speaking-practice experience on iOS.

Product UX/UIAI Feature DesignWeb App RebuildiOS + Android DevelopmentMarketing Website

Read Case Study

125k+DOWNLOADS

24k+ACTIVE USERS

100k+GAMES PLAYED

Industries We Build Flutter Apps For

Why Choose Syndell as Your Flutter App Development Company

99%

Clients Recommendation

12+

Industries Served

1539+

Projects Delivered

618+

Happy Clients

✓

Full Lifecycle Flutter Development

✓

Agile & CI/CD Delivery

✓

Established Development Team

✓

Verified Client Reviews

✓

Flexible Engagement Models

✓

Security & Confidentiality

What Our Clients Say About Us

Syndell has demonstrated excellent problem-solving skills, quickly addressing any issues that arise. The team is responsive and attentive to the client’s needs, and internal stakeholders are impressed with the service provider’s value-driven approach.

Nicole Powell

Owner, Branding Marketing Firm

The partnership with Syndell has provided the client with consistent good traffic for several years. Despite the time differences, the vendor has stayed responsive and is easily accessible via Skype, email, and other outlets. Their timely and helpful approach is commendable.

Jared White

Owner & Marketer, JBZ Beats Inc.

Thanks to Syndell’s efforts, the client started to get more leads. The client was very happy and excited about the results. Syndell provided exceptional communication and support throughout the engagement. The client described the whole process as easy.

Allan Brown

Principal, Resumes by Allan Brown

Thanks to Syndell’s efforts, the client received positive reviews and increased traction on their website. The team was professional, timely, and responsive to the client’s needs. They also provided valuable recommendations that facilitated the client’s decision-making process.

Raunak Shah

Business Owner, GenNext Learning

Syndell delivered all four milestones on time, ensuring the project progressed as planned. Their team demonstrated their expertise, managed the project efficiently, and answered questions promptly. They also communicated effectively through virtual meetings.

Buck Mclnnis

CEO, Tampa Bay Steel Corp

Syndell successfully delivered a fully functional platform. They excellently utilized Slack and Skype for all feedback and requests. Above all, their speed and responsiveness were the highlights of the engagement.

Tobi Lawson

Co-Founder, Praiki Technologies Ltd

Syndell continues to satisfy end clients with their excellent development work. Leading a straightforward and efficient workflow, the team follows directions well and collaborates closely with the client. Their attention to detail and excellent customer support are highlights.

Jay Thakker

President, Imprografix, LLC

Syndell has delivered an excellent product that matches the client’s requirements. They have been highly responsive and flexible in meeting tight deadlines. They’re an approachable team that offers quality services.

Paul Smith

Managing Director, Viva Digital

The client was very satisfied with the end product, describing it as amazing and reasonably priced. Syndell impressed with their strong project management and communication skills, which helped them ensure a seamless customer experience.

Pawel Tugeman

CEO, Lazy Rida Beats

I’ve been thoroughly impressed with the expertise of Syndell. Their support is exceptional. They’ve swiftly addressed any issues that arise. I’ve already experienced great results with their SEO and website development, and I’m looking forward to exploring their mobile app development and AI development services soon. I highly recommend them to anyone looking for reliable and innovative solutions!

Nicole Powell

Owner at HALCON

We have worked with Syndell Technologies for nearly 10 years as our outsourced partner and found their team to be reliable, available, prompt with a broad range of expertise.

Paul Smith

Owner of Viva Digital

Syndell has been a tremendous asset to our tax consulting firm. They built a modern, professional website tailored to our clientele and also developed a secure, custom software system for managing client records and compliance workflows. The team is technically strong, responsive, and easy to communicate with. We’ve already seen time-saving improvements internally. Highly recommend them to any professional service business needing a digital upgrade.

Garima Bhandari

Partner at G N Financial Services

Excellent service, quick response to changes and editing the website, professional service that is hard to find these days.

Zohany Pulido

Owner, QPI, Inc

Fantastic experience with Hiren building our website. He was very skilled and creative and fast. I will definitely work with him again! I’d give him 10 stars if possible.

Candace Pendleton

Owner, Commodities University

Engagement Models and Pricing

Model

Best For

Billing

Scope Changes

Fixed Price Model

Best For

A First Release with a Fixed Feature List

Billing

By Milestone

Scope Changes

Change Request

Time and Material Model

Best For

An App That Evolves with User Feedback

Billing

Monthly, by Hours Worked

Scope Changes

Reprioritized Each Sprint

Dedicated Team Model

Best For

A Roadmap Across Mobile, Web, and Desktop

Billing

Monthly, per Developer

Scope Changes

Directed by You Daily

Every app is scoped individually. Share your budget range on the call and we will show what it covers, then send an itemized proposal.

Recognitions That Reflect Our Commitment

Our expertise has been consistently acknowledged by global platforms and independent reviewers. From mobile app excellence to AI innovation, we’ve earned the trust of leading industry authorities and certification bodies.

App Software Developers 2026

App Development Companies 2026

Top Artificial Intelligence Company 2026

App Development Companies 2026

Top Web Developers 2026

Recognised As A Great Place To Work

Most Reviewed Blockchain Company 2026

ISO 27001 Certified

Top Web Design Company 2026

Top App Development Company 2026

Top Mobile App Development Company 2026

Top Mobile App Development Companies 2026

Top Software Developers 2026

Top Mobile App Developers 2022

Top App Development Company 2026

Top Mobile App Development Company 2026

Top IT Services India 2022

Working Across Time Zones? That’s Fine.

We provide our services in the countries below, and we plan our hours around yours.

USA · UK · UAE · Canada · Australia · India

Areas We Serve →

FAQs

How Much Does Flutter App Development Cost?

Cost depends on screens, features, back-end and API work, design depth, integrations, and which platforms you target, since Flutter can cover iOS, Android, web, and desktop. We quote a fixed price for defined scopes and monthly rates for evolving ones. Share your requirements and we will send an itemized proposal.

How Long Does a Flutter App Take to Build?

It depends on screens, integrations, design depth, and how many platforms you launch on. We give a timeline after scoping and split it into milestones, so you see working screens every sprint. A focused first release ships sooner than a full product, and we can plan one with you.

How Will We Follow Progress If Your Team Is in Another Time Zone?

We agree overlap hours at kickoff and report through Slack, email, and video calls. Each sprint ends with a short demo call and a build you can install on your own phone. Syndell has offices in Middletown, Delaware, Manchester, UK, and Ahmedabad, India.

Is Flutter Suitable for Enterprise Apps?

Yes, when the requirements fit. Flutter suits internal tools, field-service apps, customer portals, and asset tracking, with one codebase and a consistent interface. Enterprise needs such as single sign-on, device management, audit trails, and offline sync are handled through packages and native integrations, which we check during scoping.

Can You Add AI Features to a Flutter App?

Yes, when the product needs them. Flutter apps can add a chat assistant through the Flutter AI Toolkit and Firebase AI Logic, run models on the device through LiteRT (formerly TensorFlow Lite), or call cloud AI services from your back end. We compare cost, privacy, and speed before recommending one route.

Can You Migrate or Upgrade an Existing App to Flutter?

Yes. We review the current app, then recommend a full rewrite, a module-by-module move, or an upgrade if it is already in Flutter. Flutter’s add-to-app option lets a native app adopt Flutter screens gradually, so users keep a working product during the move.

When Is Flutter Not the Right Choice?

Flutter is a weaker fit for apps that need the newest platform APIs on release day, for tiny apps where download size matters, and for public content sites that need strong search visibility. If your team works in JavaScript and React, React Native may suit better. We advise honestly after scoping.

Our Blogs

3 Min Read

August 29, 2026

Business

How Business Leaders Choose Flutter for Cross-Platform Apps

A business leader's guide to choosing Flutter for a cross-platform app, with criteria for speed, cost, user experience, scalability, and delivery.

Nirav Prajapati

2 Min Read

August 19, 2026

Business

Flutter App Development Company: Buyer Guide

A buyer guide to selecting a Flutter app development company for cross-platform product strategy, delivery quality, cost, scalability, and growth.

Nirav Prajapati

6 Min Read

February 19, 2026

Business

Flutter vs React Native 2026: Complete Guide for Business Owners

Flutter vs React Native in 2026: See which framework fits your business as California mobile app experts compare costs, performance, and real project.

Yash Vyas

Tell Us What Your Flutter App Needs to Do.

Share your idea or your existing app. We will review it before we talk and tell you honestly whether Flutter fits. Want proof first? Browse our case studies.