# How long does it take to build a mobile app? A realistic phase-by-phase timeline

> A simple app with an admin panel usually takes 6 to 10 weeks, a mid-size app (store, bookings, single-city delivery) 3 to 5 months, and multi-sided platforms longer. The biggest causes of delay are scope changes mid-build, late content and approvals, and app-store review.

Source: https://www.al-arjan.com/en/blog/app-development-timeline · العربية: https://www.al-arjan.com/ar/blog/app-development-timeline.md

Author: [AUTHOR_NAME] — 2026-09-26

## Why there’s no single answer

Build time is driven by the number of screens, user types and integrations — not by the word “app”. A single-shop catalogue app is nothing like a delivery app with customers, drivers, merchants and an admin panel. So the first question is: what is the smallest version that solves your customers’ core problem?

The clearer that answer, the shorter and cheaper the build, because every extra feature means design, code, testing and future maintenance.

## The phases and how long each takes

Typical durations for a mid-size app; they shrink or grow with scope:

### Typical durations for a mid-size app
| Phase | Duration | Output |
|---|---|---|
| Discovery & analysis | 1 to 3 weeks | Scope document and screen list |
| UI design | 2 to 4 weeks | Approved interactive prototype |
| Development (app + backend + admin) | 6 to 12 weeks | Test build every two weeks |
| Testing & fixes | 1 to 3 weeks | Stable release |
| Store publishing | Days to two weeks | App available to download |

## What actually delays projects

Delays are rarely purely technical. The most common causes:

- Adding features after development starts without re-planning.
- Late copy, images and prices from the client side.
- Slow approval of designs or test builds.
- Waiting for store or payment-gateway accounts in the company’s name.
- Store rejection over policies not considered from the start.

## How to shorten the timeline without cutting quality

Launch a first version that solves one problem well, use a technology like Flutter for one app on iOS and Android, prepare content and accounts before development starts, and name one decision-maker on your side who approves within two days. These alone can save weeks.

## Frequently asked questions

### Can an app be built in two weeks?

A simple prototype or web page, yes; a real app with backend, admin panel and store publishing usually needs more weeks.

### How long do App Store and Google Play reviews take?

Usually from a day to several days, longer if the store requests changes.

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