Flutter code review, security audit, and performance optimization
Flutter lets you build web, mobile, and desktop apps from one codebase. AI tools like Cursor and Claude Code can generate Flutter/Dart code, but vibe coded Flutter apps often have state management confusion, API security gaps, and web-specific performance issues that need attention before launch.
Common Flutter issues we find
Real problems from Flutter codebases we've reviewed.
API keys embedded in Dart source code
Secret keys and API credentials hardcoded in Dart files. Since Flutter web apps compile to JavaScript, these keys are visible to anyone who opens browser dev tools.
Inconsistent state management patterns
AI tools mix setState, Provider, Riverpod, and BLoC in the same project. This makes the app confusing to maintain and introduces subtle state synchronization bugs.
Large initial download size for web
Flutter web apps ship a large main.dart.js file by default. Without deferred loading and tree-shaking, the initial page load can take several seconds on slower connections.
No input validation before API calls
Form data sent to backend APIs without client-side validation, leading to poor user experience (errors only appear after a network round trip) and unnecessary server load.
Insecure local storage of tokens
Auth tokens stored in SharedPreferences or local storage without encryption. On web, this means tokens are accessible via JavaScript injection attacks.
Missing error handling on network calls
HTTP requests without try-catch blocks or timeout handling. Network failures show raw error messages or crash the app instead of showing user-friendly feedback.
Deeply nested widget trees
AI-generated Flutter code creates deeply nested widget hierarchies instead of extracting reusable widgets, making the code impossible to read and maintain.
No web-specific optimizations
Flutter web apps that use CanvasKit renderer by default (large download) when HTML renderer would suffice, and missing SEO metadata and accessibility features.
Flutter production checklist
Key checks before deploying your Flutter app.
No API keys or secrets in Dart source files
Consistent state management pattern throughout the app
Deferred loading for non-critical routes
Client-side form validation before API calls
Secure token storage (flutter_secure_storage)
All network calls have error handling and timeouts
Widget tree depth managed with extracted components
Web renderer chosen appropriately (HTML vs CanvasKit)
HTTPS enforced for all API communications
App navigation handles deep linking and back button correctly
Not sure if your app passes? Our code audit ($19) checks all of these and more.
Our Flutter services
Security Review
Deep security analysis of your application — from API endpoints to database access.
Fix Bugs
We diagnose and fix bugs in AI-generated apps — from mysterious crashes to features that just don't work right.
Refactor Code
Clean up messy, duplicated, and hard-to-maintain code without breaking what already works.
Performance
Identify and fix performance bottlenecks — slow page loads, laggy interactions, and expensive operations.
AI tools that generate Flutter code
Start with a self-serve audit
Get a professional review of your Flutter project at a fixed price.
Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 checks
- SSL/TLS analysis
- Security headers
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerabilities
- Code quality review
- Dependency audit
- AI pattern analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Get a clear plan
We respond in 24 hours with scope, timeline, and cost.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
Can you review a Flutter web app built with AI?
Yes. We review Flutter web applications for security vulnerabilities, state management issues, performance problems, and web-specific configuration. Flutter web has unique considerations compared to mobile.
Is Flutter good for web apps?
Flutter web works well for app-like experiences (dashboards, tools, internal apps). For content-heavy sites that need SEO, a traditional web framework is usually better. We help you decide and optimize either approach.
How do I improve my Flutter web app's load time?
We implement deferred loading, choose the right renderer, optimize assets, enable tree-shaking, and configure proper caching — often reducing initial load time by 40-60%.
Related resources
Need help with your Flutter project?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.