Cost to Build a Cross-Platform Mobile MVP with Flutter in 2026
Real engineering cost and timeline guide to building a cross-platform iOS & Android mobile MVP with Flutter and Supabase. Save 45% compared to native Swift/Kotlin.
Building separate native iOS (Swift) and Android (Kotlin) apps doubles your development budget and requires managing two distinct codebases.
Flutter allows a single codebase to compile into native 60fps/120fps machine code for both iOS and Android, cutting initial engineering costs by 40% to 50%.
Paired with Supabase or Firebase as a backend-as-a-service, a high-polish mobile MVP can be built and submitted to the Apple App Store and Google Play Store in 6 to 8 weeks.
Recommended Production Architecture & Cloud Run-Rate
Proven tech stack layers designed for sub-second user latency and minimal server overhead.
Flutter 3.x (Dart) + Riverpod 2
Predictable state management, high-performance GPU-accelerated rendering, and single codebase for iOS and Android.
Supabase (PostgreSQL) + Edge Functions
Instant REST/GraphQL APIs, real-time database listeners for chats and feeds, and automated offline data caching.
Firebase Cloud Messaging (FCM) + OneSignal
Reliable cross-platform push notification delivery with deep-linking support for retention campaigns.
RevenueCat
Abstracts Apple StoreKit and Google Play Billing complexities into a clean unified API with receipt validation.
Itemized Development & Setup Cost Breakdown
What each sprint covers when delivered by a senior engineering pod.
| Milestone / Scope Item | Category | Estimated Budget |
|---|---|---|
| Mobile UI/UX Design & High-Fidelity Figma Wireframes Mobile-first design system with native iOS and Android touch targets and dark mode. | Engineering | $800 – $1,500 |
| Core Flutter App Architecture & State Management Riverpod setup, offline caching, local SQLite storage, and network retry logic. | Engineering | $1,800 – $3,200 |
| Backend API Integration & Database Schemas Supabase auth, edge functions, file storage for media uploads, and rate limiting. | Engineering | $1,200 – $2,200 |
| In-App Purchases & Push Notifications RevenueCat subscription paywall, Apple StoreKit 2 receipts, and FCM push listeners. | Engineering | $800 – $1,600 |
| App Store & Google Play Store Submission Assistance Privacy nutrition labels, screenshot asset generation, testflight beta setup, and review approvals. | Engineering | $400 – $800 |
Founder Playbook: How to Cut Costs by 40% Without Sacrificing Quality
Use Flutter Over Dual Native Swift/Kotlin Teams
Maintaining two distinct native apps forces you to hire two specialist developers and duplicate every single bug fix.
Integrate RevenueCat for Subscriptions
Handling Apple and Google subscription edge cases (grace periods, renewals, refunds, cancellations) requires hundreds of lines of brittle code. RevenueCat handles it turn-key.
Frequently Asked Questions
Does Apple reject Flutter apps?
No. Flutter compiles directly to ARM machine code. Thousands of top App Store apps (including Google Pay, BMW, and Nubank) are built with Flutter.
What recurring fees exist for mobile apps?
Apple charges $99/year for the iOS Developer Program. Google charges a one-time $25 fee for Google Play. Cloud hosting on Supabase/Firebase is typically $25 to $50/month initially.
Want an exact line-item quote for your product idea?
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