How Long Does It Take to Build an App?
As a ballpark, a focused MVP usually takes 8 to 16 weeks from kickoff to store launch, a full-featured business app 4 to 9 months, and a complex platform 9 months or more. Discovery and design take the first few weeks, development takes the largest share, and testing plus app store review add the final stretch. Timelines slip most often because of unclear scope, slow client feedback and third-party integrations.
- Timelines are estimates driven by scope, integrations, team size and how quickly decisions get made.
- Discovery and design commonly take 2 to 6 weeks before serious coding starts.
- Apple reports reviewing most submissions within 24 to 48 hours, but rejections add resubmission cycles.
- New personal Google Play developer accounts must run a 14-day closed test before production access.
- Adding people late rarely speeds a project up; cutting or deferring scope does.
Typical Timelines by Project Size
These are rough estimates for a small, experienced team working on a reasonably well-defined project in 2026. Your project can land outside them in either direction.
- Prototype or proof of concept: 2 to 6 weeks. Enough to test an idea with users or show investors, not to run a business on.
- Focused MVP: 8 to 16 weeks. One core workflow, accounts, a basic backend and admin view, launched on one platform or one cross-platform codebase.
- Full-featured business app: 4 to 9 months. Multiple roles, payments, integrations, notifications and reporting.
- Complex platform: 9 months or more. Two-sided marketplaces, real-time features, offline sync, regulated data or heavy AI work, usually released in phases.
Where the Time Goes
Discovery and planning (1 to 4 weeks)
Interviews, user flows, a feature list with priorities, technical decisions and an estimate. Skipping this phase feels fast and usually costs more time later, because unanswered questions surface in the middle of development where they are expensive. A written requirements document is the main output.
UX and visual design (2 to 6 weeks, overlapping)
Wireframes, then high-fidelity screens and a clickable prototype. Testing the prototype with five or so real users often catches confusing flows before they are built.
Development (the largest share)
Teams typically work in one- or two-week sprints and show a working build at the end of each. Backend work, integrations and admin tools usually take longer than the screens customers see.
Testing and hardening (2 to 4 weeks, overlapping)
Testing across devices and OS versions, fixing bugs, checking performance and security, and running a beta with real users through TestFlight on iOS and testing tracks on Google Play.
Store submission and launch (about 1 to 3 weeks)
Apple states that App Review typically reviews at least half of submissions in under 24 hours and 90% in under 48 hours. A rejection means fixing the issue and resubmitting, so budget for at least one round. On Google Play, personal developer accounts created after November 2023 must run a closed test with at least 12 testers for 14 consecutive days before applying for production access, and Google says that application review generally takes about a week. Organization accounts are not subject to that testing rule, which is one reason businesses should register as an organization.
What Slows Projects Down
- Scope that keeps moving. New ideas mid-build are normal; adding them to the current release without removing something else is what causes delays.
- Slow decisions and feedback. If a build sits for a week waiting for review, the schedule moves a week.
- Third-party integrations. Sandbox access, API limits and vendor support response times are outside the team's control.
- Missing content and accounts. App store accounts, legal entity verification, privacy policies, copy and images all need to be ready before submission.
- Compliance reviews. Health, finance and education apps often need legal or security sign-off.
How to Launch Sooner
Also keep in mind that adding developers late rarely recovers lost time. New people need time to learn the codebase, and coordination overhead grows with team size. A small, stable team with clear priorities usually beats a larger one assembled in a hurry.
The fastest lever is scope. Decide what the first release must prove, ship that, and put everything else on a visible roadmap. Our explainer on what an MVP is covers how to draw that line.
Other things that help: name one decision-maker on your side, set up developer accounts on day one (Apple's enrollment includes identity and organization verification that can take time), use proven services for login and payments, and agree on a weekly demo so problems surface early. If you are weighing a web app first, see whether you need an app or a website, since a web launch avoids store review entirely.
Launch Is Not the Finish Line
Plan for a stabilization period of a few weeks after launch when real usage reveals bugs and confusing spots. After that, most apps settle into a regular release rhythm, often every two to six weeks, to ship improvements and keep up with yearly iOS and Android releases and store requirement changes. Budget time and money for that rhythm from the start; see app maintenance costs.
Sources and Further Reading
We link to the primary documentation so you can verify the details yourself.
- App Review, Apple Developer
- App testing requirements for new personal developer accounts, Google Play Console Help
- Enrolling in the Apple Developer Program, Apple Developer
- App Store Review Guidelines, Apple Developer
Related Questions
Can an app be built in a month?
A narrow prototype or a simple internal tool can be. A customer-facing app with accounts, a backend and store approval in four weeks is possible only with a very small scope, ready content and fast decisions. Most quality MVPs need two to four months.
How long does Apple take to approve an app?
Apple says it typically reviews at least 50% of submissions within 24 hours and 90% within 48 hours. Incomplete submissions, missing demo accounts and guideline issues cause delays or rejections, which add another review cycle after you fix the problem.
Does building for iOS and Android double the timeline?
Not necessarily. With a cross-platform framework, most of the code is shared, so both platforms can launch close together. With two native codebases, separate teams can work in parallel, but the total effort and coordination grow.
Why do app projects run late?
The most common causes are changes to scope without trade-offs, slow feedback on builds, integrations with outside systems that behave differently than documented, and launch tasks such as store accounts and privacy policies left until the end.