How long does it take to build an app? A week-by-week timeline
By FluxsStudio Team. Published . 2 min read.
Most first versions of an app take 4 to 10 weeks. A focused web app is at the short end. A mobile app with payments, push notifications and App Store review is at the long end. The biggest factor isn't the technology. It's how much you try to put into version one.
What happens in each week?
This is the timeline we use for a typical app at FluxsStudio. Every Friday ends with a demo, so you can check progress against it.
| Week | What gets done | What you can see |
|---|---|---|
| 1 | Scope, user flows, wireframes | A clickable wireframe of every screen |
| 2 | Final design, project setup, sign-in | A working build on a preview URL or TestFlight |
| 3–4 | The core workflow and its data | The main feature working end to end |
| 5 | Payments, notifications, analytics | Real transactions in test mode |
| 6 | Testing on real devices, fixes, store submission | A release candidate |
| 7+ | Store review, launch, first improvements | The app live, then weekly updates |
What makes an app take longer?
- More than one core workflow. Each extra workflow (for example, a marketplace with both buyers and sellers) adds roughly 1 to 3 weeks.
- Integrations. Connecting to an existing system, an old API or a payment provider with unusual rules is often slower than building new features.
- Waiting on decisions or content. A week of waiting for copy, brand assets or sign-off is a week the build stands still.
- App Store and Google Play review. Review usually takes a few days, but a rejection can add a week. Plan for it.
- Regulated data. Health, finance and children's data need extra security and review work.
How do you build an app faster without cutting corners?
- Pick one workflow for version one. Write down the one thing a user must be able to do. Everything else goes on a later list. Our guide on what to put in an MVP goes through how to decide.
- Use one codebase for iOS and Android. React Native or Flutter ship to both platforms from the same code. We compare them in React Native vs Flutter.
- See a working build every week. Weekly demos catch misunderstandings in days, not months. This is the core of how we work.
- Ship, then improve. A small app in users' hands teaches you more in a week than another month of planning.
The short version
Plan for 4 to 6 weeks for a focused web app and 6 to 10 weeks for a mobile app in both stores, with a clickable prototype after the first week. If you want a timeline for your own idea, our MVP service starts with a free 30-minute call and a week-by-week plan.
Questions people ask
A simple app with one core workflow, sign-in and a backend usually takes 4 to 6 weeks to build. Add 1 to 2 weeks for App Store and Google Play review if it is a mobile app.
The usual causes are scope that grows during the build, waiting on content or decisions, integrations with third-party systems, and store review rejections. Weekly demos and a fixed first scope keep these visible early.
A clickable prototype can be ready in 1 to 2 weeks. A production app that real users can sign up to and pay in usually needs at least 4 weeks to build and test properly.