How long does it take to build a mobile app? Timelines from real projects

How long it takes to build a mobile app depends almost entirely on its scope. The business apps we have delivered took between three months and ten months, measured from the first discovery session to launch. A focused app that does one job sits at the short end, and a platform with payments or offline support sits at the long end. Those durations are history, not a quote: the only timeline worth trusting for your own app is one built on your own agreed scope, so the rest of this article shows the scopes that produced each duration and how to read your idea against them.

Ask ten agencies how long an app takes and you will get ten ranges, because the word app covers everything from a single screen that lists opening hours to a payments platform used by thousands of people. A range on its own tells you very little.

What moves a timeline is the work inside it: how many screens and user roles the app has, which features it carries, whether it must keep working offline, and how polished the design needs to be. A believable estimate names those choices. A vague one hides them.

Generic ranges are easy to find and harder to trust, because nothing stands behind them. The durations in this article each come from a project we built and shipped, so you can see the scope that produced each one.

Here are five mobile apps we delivered, with what they were built with, the headline scope and the time each took from the first discovery session to launch.

Read the table from top to bottom and the pattern is plain. The shortest app did one thing well. The longest carried payments, an auditable commission engine and a growing network, on both mobile and web. Scope, not luck, is what sits between them.

Every project we run moves through four stages, and knowing what each one is for helps you read any estimate you are given.

Discovery comes first. We agree goals, users, constraints and the one job the app must do, usually in a session and a short write up. It is the shortest stage and the one that saves the most time later, because a misunderstanding caught here costs a conversation rather than a rebuild.

Architecture and design turns that brief into wireframes, a technical plan and an agreed scope before any code is written. For an app with offline needs or heavy integrations, this is where the hard decisions are made on paper, which is far cheaper than making them in finished code.

Development and testing is the largest share of the calendar. Features are built and reviewed in sprints, with testing woven through rather than saved for the end.

Launch and support covers the store submission, the go live checks and a support window for the first weeks after release.

How long each stage takes depends on what discovery uncovers, which is why we only put dates on a project once its scope is agreed.

Three choices move an app timeline more than any others, and you can see each one in the projects above.

First, scope: the number of screens and user roles. Every extra screen and role is more design, more build and more testing. The fintech platform in the table carried the most here, with payments, downline management and an auditable commission engine across a network, which is most of why it took ten months.

Second, the heavy features. Payments, offline mode, real time updates, third party integrations and an admin panel each add design, build and testing work, and they weigh most heavily in our project estimator. The supermarket energy app took six months largely because offline first capture and background sync were the whole point of the app, not an add on.

Third, real world conditions and reach. An app that must keep working on a weak signal, or run on both iOS and Android, carries more work than one that assumes a perfect connection and a single platform. The delivery app in Kuwait built its live tracking for variable connectivity, yet kept the ordering flow deliberately short, which is how it launched in four months.

You shorten an app timeline by narrowing the first release, not by rushing the work.

Start with the one job the app must do and ship that. A small first version gives real users something to react to while the rest is still being planned, and every feature it leaves out is time it does not spend.

Move the heavy features into a second release. Payments, an admin panel and deep integrations can follow once the core app has earned its place.

Build once for both platforms. A cross platform framework like Flutter builds multi platform applications from a single codebase, so one team ships iOS and Android together instead of building twice. Our comparison of Flutter and React Native for business apps covers when each one fits.

Agree the scope in discovery before any code is written, so the date rests on decisions rather than guesses. The delivery app kept its ordering flow short on purpose, which is a large part of why it launched when it did.

A timeline is trustworthy when a real scope sits behind it. A number offered before anyone has asked how many screens the app has, which features it needs and whether it works offline is a guess wearing a suit.

The way to get a dependable estimate is the same way we build ours. Write down what the app must do, who uses it and in what conditions, then agree the scope, the stack and the milestones in a discovery session before development starts. From there a date rests on facts rather than hope.

The five apps above show how far scope stretches a schedule: three months for a focused messaging app, ten months for a payments and commission platform. Where your own app lands is something only its agreed scope can tell you.

How long does a simple app take compared with an MVP?

An MVP is the smallest version that still does the one job, so it is the quickest thing you can put in front of real users. A simple but complete app adds its own back end, a few real features and full testing on top. In our own work the focused messaging app in the table took three months from discovery to launch, but your timeline depends on what discovery agrees, not on that example.

Does building for both iOS and Android double the time?

No, not with a cross platform framework. Flutter builds from a single codebase and React Native works the same way, so one team ships both platforms from one codebase rather than building and maintaining two separate apps.

How long does app store review add at the end?

Less than most people expect. Apple reviews at least 50 percent of submissions in under 24 hours and 90 percent in under 48 hours (App Review). Google Play is usually quick too, though it can take up to seven days or longer in exceptional cases. Plan for a few days at the end, not weeks.

Can a fixed launch date work for a custom app?

Yes, if the scope can flex. Fix the date and the one core job, and let secondary features move into a later release. A fixed date with a fixed and large scope is where timelines break, because something has to give and quality should not be it.

Answer a few questions in the project estimator, then book a discovery session to agree the scope.