How to build a mobile app in 7 steps, from idea to app store launch

To build a mobile app, you follow seven steps: scope the project, write the specifications, design the user experience (UX), create the interface (UI), develop the app and its back office, test it, then publish it on the App Store and Google Play before improving it over time. Each step produces an approved deliverable that secures the next one, which prevents unpleasant surprises at the end of the project.

Step 1: scope the project

Goals, target users, competitors, business model, success metrics: scoping answers the question “why this app, and for whom?”. It is also when you define the MVP (minimum viable product), the first version that already delivers value.

Deliverable: scoping note and prioritised feature list.

Step 2: write the specifications

Features are described as user stories (“as a customer, I want to track my order”) along with their business rules. The specifications also cover integrations (payments, ERP, CRM), languages, security constraints and the technology choice: native, cross-platform or PWA.

Deliverable: functional requirements and technology choice.

Step 3: design the UX

User journeys, screen map, wireframes and then a clickable prototype. The prototype is tested with a few real users: fixing a journey at this stage costs far less than after development.

Deliverable: approved prototype.

Step 4: create the UI

Your brand identity is translated into screens: typography, colours, icons, animations and component states. A design system gathers every component to ensure consistency and speed up development. Apple’s and Google’s platform guidelines are taken into account.

Deliverable: final designs for every screen and a design system.

Step 5: develop

Development runs in two- to three-week sprints, each ending with a demo. It covers the mobile app itself, but also the back office (content, user and order management) and the API that connects them. External integrations are built and tested along the way.

Deliverable: testable builds at the end of each sprint.

Step 6: test

Functional testing, testing across devices and iOS and Android versions, performance and security testing, then client acceptance. A beta phase through TestFlight (Apple) or Google Play internal testing lets a small group try the app before launch.

Deliverable: signed-off acceptance report.

Step 7: launch and improve

Publishing requires a developer account on each store (an annual membership with Apple, a one-time registration fee with Google), a polished store listing (screenshots, description, keywords) and compliance with each platform’s rules. After launch, you track usage, reviews and crashes, and plan updates, especially for every new iOS and Android release.

Deliverable: published app, monitoring dashboard and maintenance plan.

Summary of the steps

Step	Goal	Deliverable
1. Scoping	Define the why and the MVP	Scoping note
2. Specifications	Describe the features	Requirements document
3. UX	Validate the journeys	Tested prototype
4. UI	Design the screens	Designs and design system
5. Development	Build the app and back office	Builds per sprint
6. Testing	Make it reliable	Approved acceptance
7. Launch and monitoring	Release and improve	Live app, maintenance plan

FAQ

How long does it take to build a mobile app?

For a well-scoped MVP, allow three to six months from scoping to release in many cases. A feature-rich app with many integrations takes longer.

Should I launch on iOS and Android at the same time?

It is usually better, so you reach the whole market. A cross-platform technology such as Flutter or React Native lets you release on both with a single codebase.

How long does app store review take?

Apple’s and Google’s reviews usually take from a few hours to a few days. Build some margin into the schedule, especially for a first release.

Who owns the app and its code?

You should. The contract must provide for the transfer of the source code and for publishing the app under your own developer accounts.

Build your app with Uteek

Uteek supports every step, from scoping to maintenance, for native, cross-platform and PWA mobile apps, such as the Jobito recruitment app. Let’s talk about your app.