Building an Android & iOS App: The Complete 2026 Guide
App Development

Building an Android & iOS App: The Complete 2026 Guide

May 28, 2026·7 min read·FLOWDEV Team
app developmentandroidiosreact native
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Where do you start?

Building an Android & iOS app starts with defining the idea and audience, moves through specification and design, and ends with development and a store launch. Today most apps are built cross-platform — one app that runs on both Android and iOS, saving time and money.

Step 1: Define the idea and audience

Before any code, answer three questions: who is the user, what problem does the app solve, and what is the core action. Clear answers save thousands by preventing features nobody needs.

Step 2: Specification and design (UX/UI)

Map the screens and user flow, then design them. Good design isn't just pretty — it guides the user to action intuitively.

Step 3: Choose a technology

Native means separate builds per platform (Swift, Kotlin) — maximum performance, double the cost. Cross-platform (React Native) is one codebase for both — faster and cheaper, and right for most apps.

Step 4: Development and launch

Development runs in weekly sprints so you see progress and give feedback throughout. We then handle submission and approval on the App Store and Google Play. Curious about cost? See how much it costs to build an app.

Ready to build?

Read about our app development service or estimate your app's cost.

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Want to build an app?

We build Android & iOS apps — a full startup from $1,200. Let's talk about your idea.

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