How Much Does It Cost to Build a Mobile App in 2026?
Real numbers from a Flutter agency that ships production apps every month. Includes a free cost calculator, app-type breakdown, hidden costs most agencies never mention, and a direct comparison of US vs Eastern European development rates.
The most common answer you will get from agencies is "it depends." That is technically true, but it is also a way to avoid giving you useful information. This page breaks down mobile app development costs by feature and app type, explains what drives the price up or down, covers the costs most agencies never mention, and includes a free calculator so you can build your own estimate before talking to anyone.
Mobile App Development Cost in 2026: Numbers at a Glance
Most mobile app development projects fall into one of three buckets. Here is what each one looks like in practice:
MVP
from ~$8,000
Core flows only, basic auth, simple backend. Ready to test with real users in 6 to 10 weeks.
Full product
from ~$17,000
iOS and Android via Flutter, payments, push notifications, social login, admin panel. Production-ready in 10 to 20 weeks.
All estimates above are for fixed-price Flutter projects. iOS and Android from one codebase, no double billing.
Cost by App Type
Generic ranges are useful for orientation but real projects have a type. Here is what specific categories of mobile apps actually cost to build in 2026 based on the work we have scoped and shipped.
App type
Typical range
Timeline
What drives the cost
Marketplace
$25,000 – $60,000
14 to 24 weeks
Two user roles, matching logic, payments, ratings, real-time chat
E-commerce
$15,000 – $35,000
10 to 18 weeks
Product catalog, cart, Stripe, push notifications, order tracking
This calculator gives you a rough preview to help you think through scope. Real projects are quoted after a discovery call where we break down every feature in detail. The number above is a starting point, not a binding quote.
How Long Does It Take to Build a Mobile App?
Timeline and cost are tightly linked. Every additional week of development is additional cost. Understanding typical durations helps you plan budget, launch dates, and funding rounds around reality rather than optimism.
Project type
Timeline
What happens during that time
MVP
6 to 10 weeks
Discovery and scope (week 1), core screens (weeks 2 to 7), backend, testing, App Store submission (weeks 8 to 10)
Full product
10 to 20 weeks
Discovery, design, development in milestones, QA, staging environment, production deployment
Apple review typically takes 1 to 3 days. Budget a buffer for rejection and resubmission on first submissions.
First-time App Store submissions to Apple get rejected more often than repeat ones. Budget time for at least one revision cycle, especially if your app handles payments or user-generated content.
Hidden Costs of Mobile App Development
Most agencies quote you the development cost and stop there. These are the real costs that appear after you sign and after you launch. Budget for them upfront or they will surprise you.
Costs most agencies never include in their initial quote
!UI/UX design: Unless explicitly stated, design is usually not included in a development quote. Add $2,000 to $8,000 for wireframes and a production-ready design system if your agency does not cover it.
!App Store fees: Apple Developer Program costs $99 per year. Google Play is a one-time $25 fee. Small but easy to miss when you are budgeting a first project.
!Third-party API costs: Twilio, SendGrid, Google Maps, Stripe all charge usage fees. A busy production app can add $200 to $2,000 per month in API costs from day one.
!Backend infrastructure: AWS, Google Cloud, or Supabase hosting. A small app runs on $20 to $60 per month. A real-time marketplace with 1,000+ concurrent users can exceed $500 per month.
!Maintenance after launch: iOS and Android release major OS updates every year. Your app needs compatibility updates or it stops working. Plan for 10 to 20 hours of maintenance per quarter minimum.
!Scope creep: Every feature that seems small mid-project costs real money to add properly. A disciplined discovery phase prevents most of this, but budget a 10 to 15% contingency anyway.
Ongoing Costs After Launch
Launch is not the finish line. Here is what a typical production Flutter app costs per month after it is live, broken down by category.
Backend hosting (AWS / GCP / Supabase)
Scales with users. Small app on Supabase free tier to start.
$20 – $500/mo
Third-party API fees (Stripe, Twilio, Maps)
Usage-based. Zero when app is quiet, spikes with activity.
$0 – $2,000/mo
Push notification service (Firebase)
Firebase free tier covers most small apps. Costs start at scale.
$0 – $100/mo
Developer maintenance retainer
OS updates, bug fixes, minor feature work. Quarterly or monthly.
$500 – $2,500/mo
Apple Developer Program
Annual fee to keep your iOS app in the App Store.
$99/year
Most clients keep a light retainer with us after launch. Because we built the app, no onboarding is needed and updates are shipped fast. A 10-hour monthly retainer at our rate covers routine maintenance for most apps.
What Affects Mobile App Development Cost
Understanding these variables helps you scope your project smarter before the first conversation with any agency.
Number of screens
Each screen means design, implementation, and testing time. An app with 8 screens and an app with 30 screens are fundamentally different projects. Before you talk to any agency, count your screens. If you cannot count them, your scope is not ready yet.
Backend complexity
A simple CRUD API costs a fraction of a real-time system with WebSockets, job queues, and webhook handling. Most MVPs need only the former. Adding the latter before you have validated your product is the most common way startups overspend on their first app.
Third-party integrations
Stripe, Google Maps, Firebase, Twilio, Salesforce, custom ERP connectors. Each integration adds meaningful cost depending on API documentation quality and edge cases. Every box you check here moves your budget up.
Flutter vs native: the biggest cost lever
With Flutter you get iOS and Android from a single codebase. Native development means two separate codebases, two teams, roughly double the cost. For most startups and product companies, Flutter removes the toughest cost driver from the equation entirely.
Native — Swift + Kotlin
Two codebases
2 to 4 developers, 20 to 36 weeks, $50,000+. Maintenance cost doubles after launch.
Flutter — cross-platform
One codebase, both platforms
1 to 2 developers, 10 to 20 weeks, from ~$17,000. One codebase to maintain after launch.
US Agency vs Outsourced App Development: Real Cost Comparison
One of the most searched questions around mobile app cost is whether outsourcing development to Eastern Europe actually saves money and whether the quality holds up. Here is the honest breakdown.
US agency rate
$120 – $200 per hour
A 250-hour project at $150/hr = $37,500. A 500-hour project = $75,000. Rates in NYC and SF run toward the top of this range.
Eastern Europe (Poland)
$35 – $55 per hour
Same 250-hour project at $45/hr = $11,250. Same 500-hour project = $22,500. Senior Flutter engineers, 6h daily overlap with US East Coast.
The difference on a $40,000 US project is not 20 percent. It is closer to 65 to 70 percent. For a startup or product company, that is the difference between building an MVP and building a full product for the same budget.
The tradeoff that does not exist: Polish senior engineers who specialize in Flutter are not a step down in quality. The common concern is communication, which daily Slack, Loom updates, and East Coast working hour overlap address in practice.
Considering outsourcing your mobile app development?
We work with US startups and product companies on a fixed-price model with weekly milestones and same-day communication.
Every estimate we send is based on a real scoping conversation, not a form that spits out a number.
Fixed price, not hourly billing
Most agencies bill by the hour. That means your budget is a guess until the invoice arrives. We do fixed price with milestone payments. After discovery, you know the total. Payments are tied to delivered work, not time logged.
Feature breakdown you can read
We split your product into individual features and estimate each one in hours. You see the full breakdown, not just a total number. If something looks too expensive, we discuss it. Often there is a simpler version of the same feature that costs half as much.
Milestone payments
You pay as we deliver, split into milestones tied to shipped work. Not a large upfront payment for work that has not started. Not a surprise invoice at the end.
Looking for a Flutter development agency?
See how we scope, build, and ship Flutter apps for US clients on a fixed-price basis.
Production apps shipped. Marketplaces, booking platforms, field service tools, food delivery, healthcare. Real products with real users, not demos.
4k+
Users on our largest marketplace app. Built in Flutter with real-time chat, location matching, and booking logic that handles scheduling conflicts automatically.
6h
Daily timezone overlap with US East Coast. Standups at 10am EST, same-day code reviews, real-time Slack communication. Our clients say the collaboration feels local.
A focused MVP starts from around $8,000. That covers 4 to 5 core screens, simple backend, and basic auth with no third-party integrations. The key is disciplined scoping. We help you prioritize what is essential for the first version during the discovery call.
How much does it cost to build an app for both iOS and Android?
With Flutter, the cost of building for both iOS and Android is the same as building for one platform. One codebase runs on both. This is the primary reason US startups choose Flutter over native development, where you would pay for two separate codebases.
How long does it take to build a mobile app?
A focused MVP takes 6 to 10 weeks. A full production app with payments, social login, and an admin panel takes 10 to 20 weeks. Complex enterprise apps with real-time features and multiple integrations take 20 or more weeks. Timeline and cost move together: a tighter timeline usually means a smaller scope, not faster development.
Is it cheaper to outsource mobile app development to Eastern Europe?
Yes, meaningfully so. Senior Flutter developers in Poland charge $35 to $55 per hour versus $120 to $200 in the US. For a 250-hour project that is roughly $11,000 versus $37,500 for the same scope. Eastern European teams also overlap with US East Coast hours, so communication is not the tradeoff it used to be.
What is included in your mobile app development price?
Flutter development, code review, weekly progress updates, and deployment support. Backend development is included when scoped together. Unit testing and UI/UX design are separate unless agreed otherwise upfront.
How does fixed-price app development work?
We agree on a detailed scope before signing anything. That scope drives the price. If you add features mid-project, we estimate the addition and discuss it before touching the contract. The original price does not change unless the scope changes.
Do you build mobile apps for US-based companies?
Yes, the majority of our clients are US-based. We overlap with East Coast working hours, communicate in English, and have direct experience with US App Store guidelines, Stripe payment processing, and data privacy requirements.
What ongoing costs should I budget for after launch?
Plan for maintenance and support: bug fixes, OS compatibility updates, and new features based on user feedback. Backend hosting runs $20 to $500 per month depending on usage. API fees (Stripe, Maps, notifications) add $0 to $2,000 per month at scale. Most clients keep a light retainer with us after launch because the team already knows the codebase and no onboarding is needed.
What are the hidden costs of mobile app development?
The most common ones: UI/UX design not included in the dev quote ($2,000 to $8,000 extra), App Store fees ($99/year for Apple, $25 one-time for Google), backend infrastructure costs, third-party API usage fees, and a 10 to 15% buffer for scope changes mid-project. Ask any agency you speak with to give you a total cost of ownership estimate, not just the development quote.
Let's Talk About Your Project
Tell us about your project. We will get back within 24 hours with an honest breakdown of scope, timeline, and cost. No pitch, just a real conversation.
