How long does it take to build a mobile app?
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Timelines depend on scope, team size, and how quickly your side makes decisions. These ranges are common rules of thumb, not promises.
Typical timelines
| App tier | Typical timeline |
|---|---|
| Simple (few screens, basic backend) | 2 to 4 months |
| Mid-complexity (accounts, payments, integrations, both platforms) | 4 to 8 months |
| Complex (real-time, marketplace, compliance, custom AI) | 8 to 12 months or more |
Where the time goes
- Discovery (1 to 3 weeks). Goals, users, features, and a plan.
- Design (3 to 6 weeks). Flows, wireframes, visual design, and a clickable prototype.
- Development (the longest phase). Built in short cycles with working demos along the way.
- Testing (runs throughout, with a final push). Real devices, edge cases, performance, and security.
- Launch (1 to 2 weeks). Store listings, review, and release.
See the full breakdown in the mobile app development process.
Why projects run late
- Scope creep. New features added mid-build push everything back.
- Slow decisions. Waiting days for feedback stalls the whole team.
- Unclear requirements. Ambiguity turns into rework.
- Third-party dependencies. Waiting on partner APIs, approvals, or content.
- Underestimated testing. Fixing issues found late is slower than preventing them.
A sample 16-week plan
Here is how a mid-complexity app (accounts, payments, admin panel, both platforms) might run over about four months. Real projects vary, but the shape is typical.
| Weeks | Focus | What you receive |
|---|---|---|
| 1 to 2 | Discovery and planning | Goals, user stories, feature list, technical approach, estimate |
| 3 to 5 | UX design | User flows, wireframes, clickable prototype |
| 5 to 7 | Visual design | Final screens, design system, assets |
| 6 to 13 | Development in two-week sprints | A working build to review every two weeks |
| 12 to 15 | Testing and fixes | Test results, bug list, performance checks |
| 15 to 16 | Launch preparation | Store listings, privacy forms, release candidates |
| 16+ | Store review and release | Live app, monitoring, first updates |
Notice that design and development overlap. Teams start building the first screens while the later ones are still being designed, which saves weeks.
What stretches a timeline
- Approvals that take days. If feedback takes a week, a two-week sprint becomes three.
- Content you have not prepared. Product photos, copy, legal text, and data imports often arrive late.
- Slow third parties. Payment provider onboarding, health system access, or partner API keys can take weeks.
- Changing the target. Each new feature requires design, development, and testing, and can ripple into other features.
- Compliance reviews. Security reviews and legal sign-offs belong in the plan from the start.
How to protect your date
- Add a 20 to 30 percent buffer to any launch date you promise publicly.
- Name one decision maker who can answer within a business day.
- Prepare content and accounts (developer accounts, payment accounts, domain) in the first weeks.
- Agree on a change process: new ideas go on a list for the next release unless they replace something of equal size.
- Release a beta to real users earlier than feels comfortable.
Web app vs mobile app timelines
A responsive web app or progressive web app is often faster than two native apps because there is no store review and one codebase serves every device. If speed is your priority, ask whether a web-first launch could meet your goals.
How to ship faster
- Launch a smaller first version. Read what is an MVP app.
- Use a cross-platform framework when it fits. See native vs cross-platform.
- Assign one decision maker who can answer questions within a day.
- Test continuously instead of at the end.
- Prepare store assets (screenshots, descriptions, privacy details) while development is under way.
A faster timeline is also usually a cheaper one. For the money side, see how much an app costs.
Frequently asked questions
How long does it take to build a simple app?
Usually 2 to 4 months from kickoff to store release for a focused app with a small set of features, assuming decisions and feedback arrive quickly.
Can an app be built in a month?
A very small prototype or internal tool can be. A production app with accounts, testing, and store release rarely is.
How long does Apple App Store review take?
Many apps are reviewed within a day or two, but first submissions and rejected apps can take longer. Always leave buffer time before a launch date.
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