How Long Does It Take to Build a Mobile App?
From idea to App Store, most mobile apps take 8–16 weeks. Here's a realistic phase-by-phase timeline and what speeds it up or slows it down.
Most mobile apps take 8–16 weeks to build from a clear brief to a launched product. A simple app can ship in around 6–8 weeks; a feature-rich product with custom backend, payments and real-time features typically needs 12–16 weeks or more.
The phases of an app build
- Discovery & scoping (1–2 weeks): define the product, cut to a sharp v1, agree the build plan
- UX & prototyping (1–3 weeks): flows and clickable prototypes validated before code
- Design (1–3 weeks): high-fidelity screens and a component system
- Engineering (4–10 weeks): the build, in weekly increments you can see and test
- QA & store launch (1–2 weeks): testing, submission and review handling
What slows an app down
Timelines rarely slip because engineering is slow — they slip because of avoidable friction:
- Unclear or shifting scope — the number one cause of delay
- Slow feedback and approvals from the client side
- Third-party integrations and external API limitations
- App Store review cycles, especially for first submissions
What speeds it up
Cross-platform frameworks like React Native ship both iOS and Android from one codebase. AI-assisted development accelerates the coding phase by 40–60%. And a ruthless v1 scope — fewer features, shipped sooner — beats a big-bang launch every time. The fastest projects have a decisive single point of contact who can approve work quickly.