How long does it take to build an app? It is usually the second question a founder asks, right after cost, and the honest answer is that it depends on decisions you have not made yet. A single-purpose tool with one type of user is a different project from a marketplace with payments, chat and an admin panel. The same idea can be a short build or a long one depending on what goes into the first release.
What we can do is show you where the time actually goes. An app timeline has phases, some fixed waiting periods set by Apple and Google, and a handful of factors that stretch or shorten everything else. Once you understand those, you can answer "how long does it take to build an app?" for your own project far better than any generic figure would.
How long does it take to build an app? The short answer
There is no reliable universal number, and you should be wary of anyone who quotes one before seeing your scope. What drives the calendar is the size of the first release, how quickly decisions get made, how many outside systems the app has to talk to and how many platforms it must run on. Engineering speed matters, but unclear requirements and slow feedback loops cost more time than slow coding ever does.
A useful way to break down "how long does it take to build an app?" is to treat the timeline as the sum of a discovery period, a design and build period that scales with scope, a testing and hardening period, and store review. The first and last are fairly predictable. The middle is where projects either stay on track or drift.
The phases of an app build
Every team names these slightly differently, but the work is the same. Here is how we break an app project down.
- Discovery: agree who the users are, what problem the app solves and what the first release must include.
- Design: user flows, wireframes and a clickable prototype that people can test before any code is written.
- Architecture: choose the platforms, framework, backend and data model, and plan integrations such as payments or maps.
- Build: develop the app and its backend in short cycles, with a working demo at the end of each one.
- Testing and hardening: functional testing on real devices, performance checks, security review and bug fixing.
- Store submission: listings, screenshots, privacy details, beta testing and platform review.
- Launch and iteration: monitor crashes and usage, then plan the next release from real data.
Discovery and design
Discovery is the phase founders most want to skip and the one that saves the most time later. Government delivery teams treat it as a standard step: the UK Government Digital Service says there is no set time period for a discovery, but that around 4 to 8 weeks is typical for its services. A startup app with a clear problem can often move faster than a public service, but the principle holds: settle what you are building before you pay for it to be built.
Design follows. A clickable prototype lets you test flows with real users in days rather than discovering problems after launch. If you are unsure whether you need a prototype or a first working product, our comparison of an MVP vs a prototype explains what each one is for.
Early experiments
Some teams add a short experimental phase before committing to the full build, where risky ideas are tested with throwaway code. The same GDS guidance says alphas tend to last between 6 and 8 weeks and that teams should expect to throw away the code at the end. For a private product, this is worth doing only when a core feature is genuinely uncertain, such as an unusual device integration or an AI feature that may not be accurate enough.
The build: where scope sets the pace
If one variable answers how long does it take to build an app, it is scope. Development time grows with the number of distinct things the app has to do, and it grows faster than people expect because features interact. Adding chat to an app is not one feature; it is messaging, notifications, moderation, storage and an admin view. We break the first release into features small enough to demo, and we show working software every week so that scope questions surface early instead of at the end.
| Factor | Pushes the timeline longer when | Keeps it shorter when |
|---|---|---|
| User types | Customers, providers and admins each need their own flows | One type of user in the first release |
| Platforms | Separate native iOS, Android and web apps | One cross-platform codebase, or one platform first |
| Integrations | Payments, maps, calendars, legacy systems or hardware | Few, well-documented third-party APIs |
| Design | Custom animation and a bespoke visual system | A proven component library adapted to the brand |
| Data and compliance | Health, finance or children's data with strict rules | Low-risk data with standard security controls |
| Decision speed | Feedback takes weeks and several people must approve | One empowered decision-maker reviews weekly demos |
Design choices matter here too. The line between interface polish and usability is covered in our explainer on UI vs UX; both take time, and deciding early which one the first release needs is a real scheduling decision.
Fixed waits: testing and app store review
Some of the calendar is outside your team's control, so plan for it from the start.
- Apple App Store: Apple states that, on average, 90% of submissions are reviewed in less than 24 hours. A rejection means fixing the issue and resubmitting, so build in time for at least one round trip.
- Google Play testing: developers with personal accounts created after 13 November 2023 must run a closed test with at least 12 testers opted in for 14 continuous days before they can apply for production access. The requirement applies to personal accounts, not organization accounts.
- Google Play review: Google notes that for certain developer accounts it takes more time to review apps, which may mean review times of up to seven days or longer in exceptional cases.
How to shorten the timeline without cutting corners
- Cut the first release to one core job. Every extra user type or workflow adds design, build and testing time.
- Launch on one platform first if your users are concentrated there, or use one cross-platform codebase.
- Use proven services for authentication, payments and notifications instead of building them.
- Name one decision-maker who can approve screens and answer questions within a day.
- Review working software weekly, so misunderstandings cost days rather than months.
- Prepare store assets early: privacy details, screenshots, descriptions and test accounts.
Infrastructure choices also affect speed. Picking a cloud platform your team already knows is usually faster than picking the one that looks best on paper; our AWS vs Azure comparison covers that trade-off.
How to get a realistic estimate for your app
A trustworthy estimate comes from a feature list, not from a category label such as "social app" or "marketplace". Before asking anyone "how long does it take to build an app like this?", write down the user types, the key screens for each one, every outside system the app must connect to and the platforms you need at launch. Then ask for the estimate as a range, with the assumptions written out, and ask what would change it.
Watch for estimates that are single fixed numbers with no assumptions attached. They usually mean the scope has not been examined closely, and the real timeline will show up later as change requests.
Plan your build with a senior team
Our Android and iOS app development team starts every project with a short discovery that ends in a priced, phased plan, with no obligation to continue. From there you get senior engineers, working software in the first week, weekly demos and full ownership of the code and IP from day one.
If "how long does it take to build an app?" is the question holding up your plans, tell us what you are building. A senior engineer will reply within one business day with the questions that decide your timeline.
Frequently asked questions
Can a single person develop an app?
Yes. One skilled developer can build and publish a simple app, especially with a cross-platform framework and managed backend services. The limits show up with scope: design, backend, security, testing and store work all land on one person, so larger apps usually need a small team to ship in a reasonable time.
How much does an app with 100k downloads make?
There is no reliable single figure, because downloads do not equal revenue. Earnings depend on the business model, such as subscriptions, in-app purchases, ads or a paid download, and on how many users stay active and pay. A free app with 100,000 downloads and no monetization can earn nothing, while a niche paid tool with far fewer users can be profitable.
What are the 7 stages of app development?
A common breakdown is discovery, design, architecture, build, testing and hardening, store submission, and launch with iteration. Teams name them differently, but the work is the same. The stages overlap in practice, because testing and design continue throughout the build.
Is owning an app profitable?
It can be, but many apps are not. Profit depends on solving a problem people will pay for, reaching them at an acquisition cost below what they are worth, and keeping ongoing costs such as hosting, maintenance and store fees under control. Validating demand with a prototype or small first release before a large build is the cheapest way to find out.
Does app store review add much time to a launch?
Usually not much on Apple's side, where Apple says 90% of submissions are reviewed in under 24 hours on average. On Google Play, new personal developer accounts must first run a closed test with at least 12 testers for 14 continuous days, and some reviews can take up to seven days or longer. Plan for at least one rejection and resubmission either way.
