Custom Flutter app development for iOS, Android & Web.

We build high-performance Flutter apps from a single codebase — for startups, SaaS founders, and construction tech companies that need to ship fast without doubling their budget.

95%
Native parity
Codebase
95%
Native rendering performance
30+
Apps shipped
6-12wks
From kickoff to App Store
6+
Years delivering products
95%
Native rendering performance
30+
Apps shipped
6-12wks
From kickoff to App Store
6+
Years delivering products

The short answer

Under the hood · How it works

Flutter is Google’s open-source UI toolkit for building natively compiled apps from a single codebase. Unlike React Native—which bridges JavaScript to native components—Flutter compiles directly to native ARM code and renders every pixel using its own Impeller 2.0 engine. The result is 60–120fps performance, pixel-perfect UI fidelity across platforms, and zero rendering surprises.

Bolder has been building production Flutter apps since 2019. We use it for cross-platform mobile apps, SaaS dashboards, construction field tools, and on-demand marketplaces—anywhere you need consistent UI and performance across iOS, Android, and web without maintaining three separate codebases.

The conversations that bring Flutter projects to Bolder.

Real scenarios that bring Flutter projects to Bolder. If one of these sounds familiar, we’ve solved it before.

Cross-platform mobile apps

One Flutter codebase ships to iOS, Android, and web simultaneously. No parity drift between stores, no duplicate codebases to maintain, no separate QA cycles per platform.

Construction field apps

Custom ACC, Procore, and Buildertrend companion apps that sync job cost data, RFIs, and daily reports in real time. Built for field crews on-site, offline-first.

On-demand marketplace apps

Rider/driver flows, real-time maps, Stripe Connect payouts, and multi-role architecture. Flutter handles the animation complexity that makes on-demand feel premium.

SaaS dashboards & portals

Web and mobile Flutter apps for internal tools, client portals, and data-heavy dashboards with consistent UI across every device and screen size.

Health & wellness platforms

Healthcare and wellness apps with HIPAA-compliant architecture, biometric authentication, HealthKit and Google Fit integrations, and 60fps charting interfaces.

Premium UI-first consumer apps

Flutter's Impeller 2.0 render engine makes it the only cross-platform choice for apps where micro-interactions, custom animations, and brand UI fidelity are non-negotiable.

Flutter expertise that goes beyond the surface.

We don’t just know the Flutter API. We understand the architecture decisions that make Flutter apps scale, and the performance patterns that separate good apps from great ones.

Impeller 2.0
RivePod
BLoC
Platform Channels
Fastlane CI/CD
60–120fps

Custom UI & Animation Systems

We build bespoke widget systems and animation pipelines using Impeller 2.0. No off-the-shelf component libraries — everything matches your brand and performs at 60–120fps.

Language
Dart
Platforms
iOS · Android · Web · Desktop
Render Engine
Impeller 2.0
Performance
90–95% native

True Cross-Platform Architecture

One Dart codebase compiles to iOS, Android, and web. No React Native bridge, no WebView wrappers — native ARM code with platform-specific UI adaptations where needed.

Codebase
Single Dart codebase
Compilation
Native ARM (iOS + Android)
Web target
Flutter Web / WASM
Maintenance
One team, one release cycle

CI/CD & App Store Pipeline

Weekly TestFlight and staging builds from day one. Fastlane automates signing, versioning, and submission. App Store and Play Store submission is handled by Bolder — it's in scope.

Build cadence
Weekly TestFlight builds
CI tool
Fastlane + GitHub Actions
Signing
Automated via Fastlane
Submission
Handled by Bolder

Scalable State Management

BLoC pattern with clean architecture separates UI, business logic, and data layers. Scales from MVP to enterprise without rewrites. Every feature is independently testable.

Pattern
BLoC / Riverpod
Architecture
Clean Architecture
Testing
Unit + widget + integration
Scalability
Feature-first folder structure

Your next app shouldn't take 6 months

Every workflow, more efficient Every deliverable more remarkable
Abstract vertical lines and gradient shapes in dark brown and bright orange tones.
Why Flutter

When Flutter is the right call.

Not every project needs Flutter. Here’s when it’s clearly the right call — and how it stacks up against the alternatives.

Pixel-perfect UI, in your brand language.

Bespoke widgets and animation pipelines powered by Impeller 2.0. No off-the-shelf component libraries — everything matches your brand and performs at 60–120fps.

One codebase. Three platforms.

iOS, Android, and web from a single Dart codebase. One release cycle, one QA process, no parity drift between stores.

Kickoff to App Store in 8–18 weeks.

Fixed scope, weekly TestFlight builds, App Store submission handled by Bolder. Kickoff to live app in 8–18 weeks.

BLoC pattern with clean architecture. Scales from MVP to enterprise without a rewrite.

BLoC pattern with clean architecture. Scales from MVP to enterprise without a rewrite.

React Native

Native

Single codebase
Custom UI control
Full
Partial
Full
Performance
95% native
90% native
100%
Web support
Limited
MVP speed
Fast
Fast
Slower
Best for
Premium UI, fast MVP
JS teams
Max performance
Single codebase
Custom UI control
Performance
Web support
MVP speed
Best for
Full
95% native
Fast
Premium UI, fast MVP

React Native

Partial
90% native
Limited
Fast
JS teams

Native

Full
100%
Slower
Max performance

Industries we’ve shipped Flutter apps for.

Flutter’s performance and UI flexibility makes it the right call across industries where the app experience is the product.

FinTech

We help fintech companies solve complex financial problems with secure, scalable technology that meets real business needs.

On-Demand

We build on-demand software that manages high traffic, real-time updates, and complex workflows with ease.

Construction

We help construction companies streamline operations with scalable software for project management, scheduling, field communication, and reporting.

Lifestyle

We build technology that supports long-term engagement and stable performance at scale.

Firebase

Auth, Realtime Database, Cloud Functions, and Firestore — the default Flutter backend stack.

Node.js

Custom REST and GraphQL APIs powering complex Flutter app backends.

Stripe

In-app payments, subscriptions, and Stripe Connect marketplace payouts.

AWS

Scalable cloud infrastructure, S3 for media, Lambda for serverless functions.

Supabase

Open-source Firebase alternative. Postgres database with Flutter SDK support.

Google Maps API

Location-aware Flutter apps with real-time tracking, routing, and geofencing.

OpenAI API

AI-powered Flutter features — chatbots, content generation, and smart workflows.

Auth0 / Clerk

Enterprise-grade auth for Flutter apps — SSO, MFA, and social login.

Bold Answers to Bolder Questions

Can't find what you're looking for? Get in touch with our team.

1
What is Bolder Apps?

Bolder Apps is a Miami-headquartered mobile and web app development agency, founded in 2019. They partner with startups and businesses worldwide, combining US-based leadership with a distributed engineering team.

2
How long does it take to build an app?

Typically 8–20 weeks depending on project scope and complexity. Bolder Apps moves faster than most agencies — proposals are turned around in 1–2 days versus the industry norm of 1–2 weeks.

3
What industries do you work with?

Bolder Apps serves a wide range: FinTech, Healthcare, Lifestyle, Retail, Ecommerce, Social Media, On-Demand, and Professional Services.

4
Where are you located?

Headquartered at 78 SW 7th, Miami, FL 33130, USA. The engineering team is distributed globally.

5
What programming languages and frameworks do you use?

At Bolder Apps, we utilize a variety of programming languages and frameworks to best suit your project’s needs. For cross-platform development, we use Flutter or Flutterflow, which allows us to efficiently support web, Android, and iOS with a single codebase—ideal for projects with tight budgets. For native applications, we employ Swift for iOS and Kotlin for Android applications.

For web applications, we combine frontend layout frameworks like Ant Design, or Material Design with React. On the backend, we typically use Laravel or Yii2 for monolithic projects, and Node.js for serverless architectures.

Additionally, we can support various technologies, including Microsoft Azure, Google Cloud, Firebase, Amazon Web Services (AWS), React Native, Docker, NGINX, Apache, and more. This diverse skill set enables us to deliver robust and scalable solutions tailored to your specific requirements.

1
How much does it cost to build a mobile app?

Mobile app development typically ranges from $30K to $250K+ depending on complexity, platform, and features. Bolder Apps uses scope-based pricing — no hourly billing — so your budget is defined before development begins.

2
Do you charge hourly or by project?

We work on fixed-scope pricing, not hourly rates. This means you know exactly what you're getting and what it costs before we write a single line of code.

3
What is included in the project price?

Every project includes strategy, UI/UX design, development, QA testing, App Store submission, and 4 weeks of post-launch maintenance. No hidden fees.

4
What is the minimum budget to work with Bolder Apps?

Projects typically start from $30K. For early-stage startups, a Paid Discovery session is a cost-effective way to validate your idea and build a roadmap before committing to full development.

1
What happens after I contact Bolder Apps?

You connect directly with a Product Consultant — no salespeople. Within 1–2 days you receive a tailored proposal. From there: discovery → strategy → design → development → launch.

2
What is a Paid Discovery session?

A structured engagement where we deeply analyze your product goals, user needs, and technical requirements — producing a concrete roadmap before any development begins.

3
Do you build MVPs for startups

Yes. We specialize in taking early-stage ideas from concept to a shippable product, fast. Many of our clients launch their first version within 10 weeks.

4
How do you handle project communication?

You work directly with a senior Product Consultant throughout the entire project — not a rotating cast of account managers or junior staff.

1
What platforms do you develop for?

iOS, Android, and web. We build native apps using Swift and Kotlin, or cross-platform using Flutter — supporting all three from a single codebase when budget efficiency matters.

2
Do you build AI-powered apps?

Yes. We integrate AI features including LLMs, recommendation engines, and automation workflows. We're an official OpenAI partner with direct access to API credits for qualifying projects.

3
Can you work with our existing codebase?

Yes. We offer Code Audit services to review your existing architecture before recommending whether to build on top of it or start fresh.

4
How do you handle app security?

We implement data encryption, secure coding practices, regular security audits, and follow platform-specific security guidelines for both App Store and Google Play.

Qonto client logo
Rydoo client logo
ASC client logoASC client logo

Attentiveness to detail and excellent design skills are impressive.

Steve Anavi
Senior Manager, Qonto

They truly understood our vision and translated it into a polished product with a seamless UX.

Anna Haberfellner
Senior SDR, Rydoo

They moved the project very smoothly.

Len Swegart
Senior Corporate Relations Manager, American Cancer Society

Let's discuss your goals

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ASC client logo

They moved the project very smoothly.

Len Swegart
Senior Corporate Relations Manager, American Cancer Society
Rydoo client logo

They truly understood our vision and translated it into a polished product with a seamless UX.

Anna Haberfellner
Senior SDR, Rydoo
Qonto client logo

Attentiveness to detail and excellent design skills are impressive.

Steve Anavi
Senior Manager, Qonto