Cost Breakdown by Stage: MVP vs Production vs Scale
Mobile app development costs split into three distinct stages, each with different objectives and cost drivers. Understanding which stage you are in determines how to budget appropriately.
MVP stage (weeks 1–6): The goal is a functional app with your core workflow, authentication, and data persistence. No polish, no edge cases, no analytics. For a FlutterFlow app this means 4–8 screens, Supabase backend, and basic auth. Cost: €8,000–18,000. This gets you to TestFlight and internal testing. You should be user testing within 6 weeks.
Production stage (weeks 6–16): Taking the validated MVP to public launch. This includes UI polish (consistent design system, proper loading/error states, onboarding flow), production backend configuration (row-level security, backups, monitoring), App Store assets (screenshots, preview video, optimised listing), and performance testing. Budget an additional €8,000–20,000 on top of MVP cost. Production launch is the point at which the app is ready for marketing spend.
Scale stage (ongoing): Post-launch feature development, backend scaling, A/B testing, and platform evolution. Budget 15–20% of total development cost per year for ongoing maintenance, plus a per-feature development budget for new capabilities. A 50-screen app that cost €60,000 to build should have an annual maintenance and iteration budget of €9,000–12,000 minimum to stay competitive.
Development Cost by App Complexity
**Simple app** (4–6 screens, basic CRUD, one user role): €8,000–15,000. Typical example: internal tool, simple directory, basic booking flow. Timeline: 2–3 weeks.
**Mid-complexity app** (8–12 screens, multiple user roles, payments, push notifications): €15,000–30,000. Typical example: marketplace MVP, SaaS mobile companion, booking platform. Timeline: 4–6 weeks.
**Complex app** (15+ screens, complex logic, AI features, real-time, custom integrations): €30,000–60,000. Typical example: full-featured SaaS mobile app, social platform, fintech app. Timeline: 8–12 weeks.
These are agency rates. A freelance FlutterFlow developer costs €400–800/day and takes longer, account for QA, project management, and deployment time that agencies include.
Hidden Costs You Need to Budget For
Every mobile app project has costs that are not in the initial scope but are unavoidable. Planning for them prevents budget shocks three months into the project.
Revision rounds are the most common source of budget overrun. Most clients underestimate how much a screen changes between wireframe and the moment real users interact with it. A professionally managed project includes 2–3 rounds of structured revisions in the original quote. Anything beyond that is change-order territory. If you are working with a fixed-price agency, read the revision policy carefully, "unlimited revisions" in a fixed-price contract is either an overpriced quote or a future negotiation.
App Store compliance is often overlooked at project start. Apple requires a privacy policy URL in every app listing, a data deletion mechanism for apps that handle user accounts, and an App Privacy section that accurately declares what data the app collects. For EU-focused apps, GDPR compliance adds consent management, a data processing agreement with your backend provider, and a response process for subject access requests. These are not optional and cannot be retrofitted cheaply, build them into the initial scope. Budget €1,000–3,000 for proper legal and compliance setup.
Third-party service integration always takes longer than estimated. Connecting to a payment provider, a CRM, an ERP, or an existing internal system routinely doubles the backend development time for that feature. If your app needs to integrate with systems you do not control, especially legacy systems with undocumented APIs, add 30–50% to your backend budget.
Tool Costs (Monthly)
FlutterFlow: $0 (free, limited) / $30 (basic) / $70 (pro) / $150 (teams). For production apps, you need at least the $70 Pro plan.
Supabase: $0 (free tier, great for MVPs) / $25/month (pro, required for production). Pro includes daily backups, no pausing, custom domains.
Xano (if used for backend logic): $59–135/month.
Firebase (if used instead of Supabase): Often free at MVP scale, but pricing scales unpredictably with users.
**Total tool cost for a production app**: €100–200/month covering FlutterFlow + Supabase + any third-party services (email, push notifications, payments).
App Store Costs
Apple Developer Program: $99/year (required to publish on iOS). One-time setup, includes TestFlight for beta testing.
Google Play Developer Account: $25 one-time fee (required to publish on Android).
Note: Apple reviews every update, typically 1–3 days. Plan releases accordingly, a bug fix can't go live the same day on iOS.
Agency vs Freelancer vs DIY: Real Cost Comparison
The three options for building a no-code mobile app each come with different cost profiles, timelines, and risk distributions. Understanding the trade-offs helps you choose the right path for your situation.
DIY with FlutterFlow: FlutterFlow's Pro plan is $70/month and includes excellent documentation and a YouTube tutorial library. If you have 3–4 months of learning time and your app is relatively straightforward, this is viable. Realistic timeline: 3–6 months to a shippable app for a non-technical founder. Cost: tool fees only (€100–300 total). Risk: significant learning curve, no one to diagnose architectural mistakes, and the app may have structural issues that are expensive to fix later.
Freelance FlutterFlow developer: rates range from €250–500/day for a mid-level developer to €600–900/day for senior. A 4-week mid-complexity app at €400/day × 20 days = €8,000 in development. Add project management time (yours), QA, and App Store submission, realistic total €10,000–15,000. Risk: variable quality, no guarantees, and if something goes wrong after delivery you pay again for fixes. Interview at least three freelancers, request references from live apps, and test their FlutterFlow knowledge with specific questions.
Specialised agency: higher upfront cost (€15,000–35,000 for the same mid-complexity app) but includes project management, QA, deployment, App Store submission, and post-launch support. The total cost over 12 months, development plus fixes, plus updates, is often similar to or less than the freelancer path when you account for the iterations that follow initial delivery. For apps that are central to your business, agency delivery risk is materially lower.
No-Code vs Native: Real Cost Comparison
For the same mid-complexity app:
| | No-Code (FlutterFlow) | Native (React Native) | Native (Swift+Kotlin) | |---|---|---|---| | Development | €15–30K | €60–120K | €80–180K | | Timeline | 4–6 weeks | 4–6 months | 5–8 months | | Monthly tools | €100–200 | €50–100 (hosting) | €50–100 (hosting) | | First major update | €3–8K | €15–30K | €20–40K |
The no-code advantage is largest at the MVP stage. At scale (50,000+ DAU), the gap narrows because infrastructure costs grow regardless of the tech stack.
ROI Calculation: Is the App Worth Building?
Before committing to a mobile app budget, calculate the return on investment. This exercise clarifies how much you can justifiably spend and sets the criteria for success post-launch.
For a revenue-generating app: estimate the number of users you expect in year one (be conservative, use 30% of your most pessimistic estimate), the average revenue per user per year, and the conversion rate from free to paid. If you expect 500 paying users at €120/year average revenue, year one revenue potential is €60,000. A development investment of €25,000 has a 12-month payback period with reasonable user acquisition. Add €5,000 for ongoing maintenance and €10,000 for marketing, and the business case requires €40,000 in revenue to break even in year one, achievable with 333 paying users.
For a cost-reduction app (internal tool): estimate the hours of manual work the app eliminates per week, multiply by your labour cost, and calculate annual savings. A tool that saves 20 hours/week at a fully-loaded €50/hour cost = €52,000/year in saved labour. A €20,000 development investment pays back in under 5 months. Internal tools often have the clearest and fastest ROI of any mobile app category.
For both types of app, the ROI calculation depends on a realistic user adoption estimate. Every internal tool or B2B app has an adoption problem: building it is the easy part, getting people to actually use it consistently is where most apps fail. Budget €2,000–5,000 for change management and training for internal tools. For external apps, budget at least 3 months of marketing spend before declaring the ROI assessment valid.
Hidden Costs to Budget For
**Third-party services**: Push notifications (OneSignal, free tier usually sufficient), analytics (Mixpanel $25/month or Amplitude), error tracking (Sentry $26/month). Budget €100/month for third-party services.
**Ongoing maintenance**: Budget 15–20% of development cost per year for updates, dependency upgrades, and new FlutterFlow versions.
**App Store compliance**: Privacy policy, data deletion flow (Apple requirement), GDPR compliance for EU users. These should be built in from day one, retrofitting is expensive.
**Design assets**: App icons (1 icon in all required sizes), splash screen, screenshots for the App Store listings. Budget €500–2,000 for professional assets.