What is Flutter (in plain English)
Flutter is a framework created by Google in 2018 that lets developers write code once and publish it on iOS, Android, the web and even desktop — all from a single project. The language used is Dart, easy to learn for anyone coming from Java, Kotlin or TypeScript.
The key difference from other frameworks: Flutter doesn't use native iOS or Android components. It renders its own widgets via the Skia/Impeller graphics engine, guaranteeing identical appearance and behaviour on all platforms. The result: pixel-perfect apps with fluid animations and very high performance.
Flutter in numbers (2025)
Over 1 million apps published on stores use Flutter. Major users: BMW, eBay Motors, Alibaba Xianyu, Nubank, Reflectly. Backed by Google's full development team.
6 business use cases for Flutter
Here are the scenarios where Flutter delivers the most value for small and medium businesses:
Product catalogue
Showcase products with photos, prices and availability. Works offline. Perfect for sales reps.
Bookings & appointments
Salons, clinics, studios: integrated calendar, reminders and payment confirmation.
Field operations
Technicians compile intervention reports, photos and signatures directly on site — syncs when online.
Customer loyalty
Points, rewards, push notifications for promotions. Keeps customers coming back.
Internal dashboard
KPIs, orders, warehouse stock: data at a glance for managers and owners, even on the go.
Mobile e-commerce
Checkout, tracking, wishlists and push notifications for cart recovery. Integrates with Stripe and PayPal.
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Flutter vs React Native vs Native: the real comparison
Choosing the right technology determines budget and timelines. Here's an honest comparison:
| Feature | Flutter | React Native | Native (iOS + Android) |
|---|---|---|---|
| Language | Dart | JavaScript / TypeScript | Swift + Kotlin |
| Code sharing | 95%+ shared | 80–90% shared | 0% — two separate codebases |
| Performance | Excellent (own renderer) | Good (native bridge) | Maximum (native) |
| UI consistency | Identical on all platforms | Slight platform differences | Platform-specific UI |
| Development cost | Low (one team) | Low (one team) | High (two teams/projects) |
| Time to market | Fast | Fast | Slow (double the work) |
| Ecosystem / libraries | Large and growing | Very large (JS ecosystem) | Maximum (platform SDK) |
| Best for | Business apps, high-design UIs | Web teams moving to mobile | Advanced games, heavy device APIs |
Verdict for most small businesses
Flutter is the sweet spot: better performance than React Native, far lower cost than native, and a UI quality that rivals purpose-built apps. It's the choice we recommend at IOMASSISTO for 90% of business app projects.
Real 2025 costs for a Flutter app
Budgets vary enormously depending on complexity. Here's a realistic breakdown:
| App type | Features | Timeline | Cost (estimate) |
|---|---|---|---|
| Basic | 5–8 screens, static content, contact form | 4–6 weeks | €3,000 – €6,000 |
| Standard | Login, database, push notifications, CMS | 8–14 weeks | €6,000 – €15,000 |
| Advanced | Payments, maps, offline mode, API integrations | 14–24 weeks | €15,000 – €35,000 |
| Enterprise | ERP/CRM integration, custom AI features, multi-tenant | 5–9 months | €35,000+ |
Hidden costs to account for:
- Apple Developer account: $99/year (required for App Store)
- Google Play account: $25 one-time fee
- Backend hosting (Firebase, Supabase, VPS): €10–€200/month depending on traffic
- Annual maintenance and updates: 15–20% of initial cost per year
Beware of quotes under €2,000
A quality Flutter app cannot cost €500–€1,500. Those quotes usually mean: overseas dev with no testing, a repackaged template with your logo, or no post-launch support. Ask for a portfolio, references and a written contract before signing anything.
When Flutter is the right choice (and when it's not)
Flutter is ideal when:
- You need to reach both iOS and Android users on a single budget
- Design quality matters — custom UI, animations, branded experience
- You want fast delivery: one team, one codebase, shorter sprints
- Your app is primarily data-driven (forms, lists, dashboards, CRMs)
- Budget is a constraint but you can't compromise on quality
Consider alternatives when:
- Your app requires deep hardware access: advanced AR/VR, Bluetooth LE protocols, custom camera pipelines
- Your team already has strong JavaScript/React expertise — React Native may be faster to adopt
- You're building a high-performance 3D game — Unity or Unreal Engine are better suited
- You only need an iOS app (no Android) — native Swift may be more efficient
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How to get started in 3 steps
1
Define scope and user stories
Write down who uses the app, what they need to do and what problem it solves. Prioritise features into: must-have, nice-to-have, future phase. This one document prevents 80% of project scope creep.
2
Wireframes and technical design
Before writing any code: approve wireframes (screen layout), choose the backend stack (Firebase / Supabase / custom API) and agree on a delivery timeline with clear milestones. Get a signed contract with defined deliverables.
3
Agile development with weekly demos
Development happens in 2-week sprints. At the end of each sprint you receive a testable build — not a screenshot, an actual working app. Feedback is incorporated in real time, avoiding expensive surprises at launch.
Frequently asked questions
Flutter is Google's open-source framework for building cross-platform apps — iOS, Android, web and desktop — from a single Dart codebase. Released in 2018, it now powers apps like eBay Motors, BMW App and Alibaba Xianyu, demonstrating enterprise-grade reliability.
A simple Flutter app (catalogue, booking, internal tool) costs between €3,000 and €8,000. A medium-complexity app with login, database sync and notifications runs €8,000–€20,000. Advanced apps with custom integrations, payments and CMS can reach €20,000–€50,000+. Because Flutter targets iOS and Android simultaneously, you typically save 30–40% versus building two native apps.
A basic Flutter app takes 4–8 weeks. A medium app with backend integration takes 8–16 weeks. A complex app with custom features, third-party integrations and extended testing takes 4–6 months. Timelines vary based on complexity, number of integrations and approval processes (Apple App Store review can add 1–3 days).
Flutter uses Dart and renders its own UI widgets — pixel-perfect across platforms, better performance for animations and graphics. React Native uses JavaScript and native components — easier for teams with web experience, larger JS ecosystem. For new business apps prioritising performance and design consistency, Flutter is generally the better choice.
Yes. To publish on the App Store you need an Apple Developer account ($99/year). For Google Play you need a Google Play Developer account ($25 one-time). Both are mandatory for public app distribution. IOMASSISTO handles account setup, app submission and ongoing update management as part of the development service.