What Determines How Much a Mobile App Costs?
After 50+ builds, we've found the same five things move the number. Here they are.
1. Complexity: How many screens, how many features, how many integrations, how much logic underneath. A 5-screen calculator app sits an order of magnitude below a 50-screen marketplace that needs payments, chat, and real-time tracking all at once.
2. Platform: Picking one platform (iOS or Android) shaves about 40% off the effort of building both. Going cross-platform with Flutter or React Native lands around 60% of the effort two native builds would take.
3. Design: Off-the-shelf UI components are one level of effort. Custom animations, illustrations, and the little interaction details are another. Going bespoke usually adds 20-40% on top of the design work.
4. Team location: This one's blunt. Where your team sits changes the salary structure sitting behind every hour of work, and the US, Eastern Europe, and India sit at very different points on that curve for the same output.
5. Backend complexity: A plain REST API is cheap. Real-time sync is pricier. Full microservices is pricier still. Every step up adds to both the bill and the calendar.
What Does a Simple App Cost to Build?
What you get: 5 to 10 screens, basic login, simple create-read-update-delete operations, and one third-party hook (maps, payments, or notifications) on standard UI components.
Examples: a calculator, a timer or alarm, a no-frills task manager, a business card scanner, a basic recipe app, an event countdown. That kind of thing.
Timeline: 6 to 8 weeks with a 2-person team.
Team: one developer plus a part-time designer. At this size the whole budget question is whether the designer assembles standard components or draws custom UI, and whether your single integration is a drop-in SDK or a bespoke sync you have to build and maintain.
Apps like these usually earn through ads or act as a companion to a business you already run. Nobody's getting venture funding for them. They just do one job well, and that's the point.
What Does a Medium-Complexity App Cost?
What you get: 15 to 30 screens, login with social sign-in, Stripe payments, real-time bits like chat and notifications, maps and geolocation, an admin panel, multiple user roles, push notifications, and analytics on top.
Examples: an e-commerce app, food delivery, a fitness tracker with a social layer, a booking or reservation system, a stripped-down ride-sharing app, a property listing app.
Timeline: 3 to 5 months with a 3-4 person team.
Team: two developers, one designer, one QA, and a part-time PM. What moves the effort at this tier is the data layer, how many external systems you integrate against, and whether the admin panel is a simple table view or a full operations console with roles and audit trails.
Honestly, this is the sweet spot for funded startups. You get enough features to prove product-market fit, enough polish that people actually stick around, and enough architecture to reach 50,000 users without a rewrite. Want our team to build it? You can build it with our mobile team, or look at our full mobile app development services.
What Does a Complex App Cost to Build?
What you get: 40+ screens, real-time sync, video calling or streaming, AI features, multiple languages, offline mode, and the gnarly payment flows like subscriptions and marketplace payouts. Add compliance work (HIPAA, PCI DSS), deep analytics, and integrations into outside EHR or CRM systems.
Examples: a telemedicine platform, a fintech app with KYC, a marketplace juggling buyer, seller, and admin roles, a fleet management system, an enterprise productivity suite.
Timeline: 6 to 12 months with a 5-8 person team.
Team: three to five developers, a designer, two QA, a DevOps engineer, and a PM. At this tier the compliance load, the number of outside systems you must certify against, and who owns the infrastructure after launch move the effort far more than screen count does.
With complex apps, the architecture has to be planned before anyone writes code. Skip that and you'll be rebuilding three to six months in. We've watched it happen. That redo costs far more than getting it right the first time.
How Do App Development Costs Compare by Region?
United States: the most expensive market on the planet, and the premium buys the deepest talent pool and the easiest conversations. US engagements price on seniority and on how much architecture ownership you hand over rather than on the feature list itself.
United Kingdom: a high quality bar and a timezone that lines up nicely with EU clients. The premium here tracks London salary structure, so it follows seniority and scarcity of specialists, not the difficulty of the work you are asking for.
Eastern Europe (Poland, Ukraine, Romania): solid technical schooling, EU timezone overlap, good English. European companies reach here a lot, usually when they want a middle ground between a fully local team and a fully offshore one.
India: a 5.7M developer pool that adds 1.5M graduates every year. Work with an established partner and the engineering standard holds. What decides whether the saving is real is process: project management, QA, architecture review, and documented handover. Without those, rework quietly eats the difference.
The comparison that actually matters: the same medium-complexity app needs the same feature depth, the same data layer, and the same integration surface no matter which region builds it. Region changes the team shape and the salary structure behind it, nothing else. What you hand over at the end, a working, polished, production-ready mobile app, doesn't change.
Read our full guide on building with an India-based product team →
