How long it takes to build an app: real timelines by stage

After the price of an app, the question I hear most from founders is: “how soon will the app be ready?”. It almost always comes with a date in mind. An event, a funding round, the sales season. And almost always the date was picked before anyone looked at what the app needs to do.

An app's timeline isn't a fixed number. It's the sum of steps, and some of them don't even depend on who builds it. In this guide I show how long the market takes, what happens in each step, the store timelines you don't control and what actually shortens the calendar.

How long it takes to build an app, according to the market

The most cited public reference is Clutch's app guide, a platform that collects verified client reviews of development companies. In the version updated on September 21, 2026, Clutch says an app project takes about 11 months on average.

The same page makes the caveat that matters: some apps are done in a few weeks, others take months or even years. According to Clutch, the timeline depends on the app's complexity and the team's size. More features means more work hours.

Read the average as the market, not as a target. It mixes simple apps with huge products from many countries. What sets your app's timeline is the size of the first version, and you decide that size.

The 5 steps of an app and what weighs on each

Clutch lists the phases of an app's lifecycle: discovery, planning, design, development, testing, launch and maintenance. For someone hiring, they fit into five steps.

1. Discovery

This is where you decide what goes into the first version. Who uses the app, what task it solves, which systems it talks to. A short, well-run discovery saves weeks later. A skipped discovery turns into rework mid-development.

2. Design

Flows, screens and a clickable prototype. The timeline here depends less on the number of screens and more on how many people need to approve. A decision stuck for ten days on a partner's desk costs ten calendar days.

3. Development

This is the longest step. App, back end and admin panel, which almost always exists even when nobody mentions it. Every user role and every integration adds time here.

4. Testing

Testing on real devices, iPhone and Android, with small screens, bad networks and low battery. Fixing what comes up. Testing again. This step shrinks when testing happens during development, not just at the end.

5. Store review

The finished app still needs approval from Apple and Google. It's the only step where the timeline depends on neither you nor your vendor, so it gets its own section.

Apple review and Google closed testing: the time you don't control

On the App Store, Apple's App Review page says review runs around the clock and usually covers at least 50% of submissions in under 24 hours and 90% in under 48 hours. Apple itself warns that an incomplete submission can delay review or be rejected. You can request an expedited review, for example to fix a critical bug or launch alongside an event, but with no guaranteed timeline.

On Google Play, the rule that catches founders off guard is a different one. According to Play Console Help, personal developer accounts created after November 13, 2023 must run a closed test with at least 12 opted-in testers for 14 days in a row before publishing. Testers who drop out before 14 days don't count. Only then can you apply for production access, and that review “usually takes seven days or less”, according to Google.

On top of that, the Publish your app page warns that some apps go through extended review, which can take 7 days or longer in exceptional cases.

Add it all up: a new personal Google Play account may need three weeks between a finished app and an app in the store. That has to be in the schedule from day one, not discovered the week of launch.

What makes an app take longer

Delays repeat from project to project. The most common:

• Scope that grows midway. Every “just one more screen” has a flow, rules and testing. Added up, they become months.
• Integrations with legacy systems. An ERP with no documentation, an unstable API, a test environment that doesn't exist. This is where the calendar slips most.
• Too many user roles. Customer, professional and admin are almost three apps in one.
• Slow approvals. Content, copy and decisions that depend on several people at your company.
• Store accounts opened late. Apple and Google sign-up, company details and the closed test should start alongside development.
• Store rejection. A missing privacy policy, a login the reviewer can't test, incomplete information. Every resubmission means another wait.

Notice that almost none of these items is “slow coding”. Time gets lost in decisions, dependencies and third-party rules.

How to go faster: cut scope, not quality

Asking the team to work faster rarely works. What really shortens the timeline is reducing what needs to be ready in the first version. I wrote about this method in cutting scope to hit the date.

In practice, it works like this:

1. Pick the one task the app must do well at launch. Everything else goes on a list for future versions.
2. Start with fewer user roles. If the admin can work from a simple web panel, the app gets smaller.
3. Postpone integrations that don't block operations. A manual export for a few weeks costs less than a month of delay.
4. Use one codebase for iOS and Android when the app doesn't need very device-specific features. It's worth understanding the difference between native, hybrid or PWA.
5. Open the store accounts and the closed test early, so Google's two weeks run in parallel with development.
6. Define who approves what, and within how many days. One person with decision power is worth more than a committee.

A smaller app that goes live early starts generating real usage data. And that data tells you what to build in the second version, not the wish list from the start of the project.

How we do it at the Studio

At the Studio, the deadline is written into the contract, along with the fixed price set after discovery. Before any date, we define what goes into the first version and what stays out. We have our in-house dev team, and we use Claude Code and Figma for design and build. The code, files and access, including the store accounts, stay in the client's name.

Two cases show what happens when the scope fits the date. AI Vou Eu, an AI travel SaaS, went live in 4 weeks with the Studio. LCX, a travel company operating in more than 10 countries in South America, had one system per country and moved to a single system, live in 29 days.

And every product ships with an AI agent that runs every day, flags failures, suggests improvements and checks that the data makes sense. So the second version starts with information, not guesswork.

If you have a date and want to know what fits in it, the Studio's app development starts with that discovery.