The honest answer to this question is: it depends on what you are building. But "it depends" without a framework is unhelpful. Here is what actually drives mobile app cost and what realistic budgets look like for different types of applications.
The variables that determine cost
Mobile app cost is determined by: the complexity of features, whether you need iOS, Android, or both, whether a backend is required, the quality of design, how many integrations are needed, and who builds it.
Each of these has a meaningful cost impact. A simple single-platform app with no backend costs a fraction of a multi-platform app with complex backend requirements.
What "complexity" actually means in cost terms
Simple apps: Display information to users, allow basic input, maybe connect to a simple API. Reading data, displaying lists, basic forms. No real-time features, no complex business logic, no custom UI.
Examples: a company's information app, a simple event schedule, a basic booking form for a service.
Cost range: $15,000 to $40,000. Timeline: 8 to 16 weeks.
Moderate apps: User authentication with accounts, a core feature involving creating and managing data, notifications, multiple screens with navigation, payment processing, one or two integrations.
Examples: a fitness tracking app, a restaurant ordering app, a simple SaaS mobile companion to a web product.
Cost range: $40,000 to $100,000. Timeline: 16 to 28 weeks.
Complex apps: Real-time features (messaging, live updates), complex business logic with multiple states, multiple third-party integrations, maps, camera or media features, offline functionality, or any feature that involves significant data processing.
Examples: a ride-sharing app, a social platform, a complex enterprise tool, anything with live video or audio.
Cost range: $100,000 to $300,000 and up. Timeline: 6 to 12 months.
iOS vs Android vs both
Building for both platforms costs more than building for one. The question is how much more.
Native development (separate iOS and Android codebases): Two separate codebases means close to double the development cost. Swift for iOS, Kotlin for Android. Two sets of developers, two test environments, two deployment pipelines.
Native development produces the best performance and the most platform-appropriate user experience. For applications where performance or platform-specific features matter, native is the right choice.
Cross-platform development (React Native, Flutter): One codebase that runs on both iOS and Android. Development cost is 30 to 50 percent less than native for both platforms combined. The trade-off is slightly lower performance on complex UI interactions and occasional platform-specific quirks to handle.
For most business applications, cross-platform development is the pragmatic choice. React Native and Flutter are both mature platforms used in production by major companies.
The practical default for 2026: Most new apps start cross-platform. The cost savings justify it unless there is a specific reason native is required.
The backend question
Most mobile apps that do anything useful need a backend: a server that stores data, handles authentication, runs business logic, and serves as the connection point between the mobile app and any third-party services.
Backend cost is often underestimated in mobile app projects. A backend for a moderate app adds $20,000 to $50,000 to the project, plus ongoing hosting costs.
If you already have a web product with a backend, your mobile app can often connect to the same backend. This reduces mobile app cost significantly because you are building only the mobile interface, not the full system.
Design is not a minor cost
UI/UX design for mobile applications is a meaningful cost that is sometimes bundled into development estimates and sometimes quoted separately.
Good mobile app design requires:
- User research and flow mapping before screens are designed
- Wireframes and prototypes for user testing
- Full design specification for all screens, states, and interactions
- Design handoff assets for developers
Design cost for a moderate mobile application: $8,000 to $25,000. For complex applications with custom UI, more.
Shipping a mobile app with poor design has real business consequences. Mobile users make judgments about app quality in seconds and abandon poor experiences without giving feedback. Design investment protects the development investment.
App store fees and review
Both Apple App Store and Google Play Store require registration fees. The Apple Developer Program is $99 per year. Google Play Developer account is a one-time $25 fee.
App store review is required before any app is live. Apple's review process is more stringent and takes longer (typically 1 to 3 days for new apps but can take longer for first submissions). Review rejections are common on first submission. Budget time for review and resubmission.
Ongoing costs after launch
Mobile apps incur ongoing costs beyond the initial build:
OS updates. iOS and Android release major updates annually. Apps that are not updated to address breaking changes may stop working or be removed from stores. Budget one to four weeks of developer time per year for OS compatibility updates.
Bug fixes. Users find bugs that did not appear in testing. These require fixes and updated releases.
Feature additions. Users request features. Competitors add features. Your roadmap continues after launch.
Backend hosting. If you have a backend, the hosting cost continues indefinitely.
A maintenance budget of 15 to 20 percent of initial development cost per year is reasonable for an active mobile product.
A note on AI development tools
AI coding assistants (Copilot, Cursor, Claude) have increased developer productivity for mobile development. This can compress some development timelines. Do not expect it to reduce costs by more than 15 to 25 percent, and only with developers who are actively using these tools effectively.
Getting an accurate estimate
The range in mobile app cost (from $20,000 to $300,000) is wide because the projects are genuinely different. The only way to get an accurate estimate is a detailed scoping conversation about your specific app.
Use the MVP cost calculator for a rough baseline. Then get in touch with our mobile development team to discuss your specific requirements. We build on React Native and can advise on whether cross-platform meets your needs or whether native development is warranted.