Module 02 · Mobile Apps

Android and iOS App Development: A Platform-Specific Experience in Native Code

An Android and iOS app built with Swift and Kotlin uses each platform's own design language and hardware capability at full performance; this page focuses on the native side of our Mobile Apps service.

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In depth
01

Platform-Specific Design Languages: Human Interface and Material Design

On the iOS side we write to the Human Interface Guidelines in Swift, and on the Android side to Material Design principles in Kotlin — two separate interface codebases.

Unlike a single codebase in React Native, this approach makes every component, from transition animations to button behaviour, match exactly the platform language the user is used to. Because the navigation bar, gesture recognition and keyboard behaviour work differently on iOS and Android, the native compiler reflects those differences without compromise. Since Kotlin and Swift are the languages each manufacturer optimizes for its own operating system, the interface talks to the system directly.

02

How does a native app reach the hardware: camera, sensors, Bluetooth?

Native development reaches hardware layers such as the camera module, the accelerometer, GPS, the fingerprint reader and Bluetooth peripherals through the operating system's own APIs.

That route lets the camera preview run without lag, sensor data be gathered continuously in the background, and external devices (a smartwatch, a measuring instrument, a card terminal) pair with low latency. Notification permissions, location tracking and biometric verification also connect straight into the platform's security layer, which makes the user consent flow and data security more predictable on the native side. On apps doing image processing, measurement or location-based services, that direct connection is where the performance difference shows most. Platform behaviour is documented; Apple's interface guidelines and Material Design describe different patterns.

01 Two design languages Two design languages: two phone frames side by side, iOS on the left, Android on the right — illustrative graphic Two equal phone frames. On the left, iOS: a centred title bar at the top, below it three list rows each made of an icon and two text bars with a chevron on the right, and a five-item tab bar at the bottom; under the frame it reads Swift and Human Interface. On the right, Android: a left-aligned title bar at the top, below it two raised cards, and a round action button at the bottom right; under the frame it reads Kotlin and Material Design. In the animation the frames come in first, then the inner elements in turn. Platform-specific design language iOS Swift Human Interface Android Kotlin Material Design
02 Hardware layer Hardware layer: five hardware rows, a hardware API band and the phone on the right — illustrative graphic On the left, five hardware rows one below the other: camera, accelerometer, GPS, fingerprint and Bluetooth, each starting with an icon box. Thin lines leaving those rows enter a vertical band in the middle labelled “Hardware API”. Past the band the lines converge at a single point on the phone to the right, whose screen shows a sensor trace and two data bands. In the animation the rows light up in turn and the lines are drawn from left to right towards the phone. Direct access to the hardware Hardware API Camera Accelerometer GPS Fingerprint Bluetooth full permissions
03 Two codebases Two codebases: Swift and Kotlin windows with a shared band beneath them — illustrative graphic Two code windows side by side. Above them it reads iOS and Android; the windows' top bars carry file tabs, Swift on the left and Kotlin on the right. In each window seven lines of code are represented only by bars — no real code is written. A connector from each window runs down into a shared band reading “Separate codebases, moving forward together”. In the animation the windows come in, then the code lines in turn, and the shared band appears last. Two separate codebases iOS Android Swift Kotlin Separate codebases, moving forward together
Illustrative graphic. It draws the route the page describes: the same app set up as two separate interface codebases on the iOS and Android sides, connecting to the hardware layers through the operating system's own APIs, with the two codebases moving forward together. The phone frames and code windows are an example interface drawing, not taken from a real app; the code lines are represented only by bars so as not to invent names. No brand, platform or product logo is drawn — iOS, Android, Swift and Kotlin appear only as text. The two platforms are deliberately drawn with equal weight: the page doesn't present one as better than the other.

For the current price and timeline band , look at the pricing section on the Mobile Apps page — you can settle the band for your scope in two minutes.

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FAQs

Frequently asked questions: native iOS and Android app development

Are iOS and Android built separately, or at the same time?

A separate codebase is prepared for each platform; but the design, API integration and testing run in parallel, so the iOS and Android versions move forward together.

When is a native app the better choice over React Native?

Native is preferred on projects involving heavy graphics work, complex animation, camera or sensor-based features, and where a platform-specific feel is expected. Where getting to launch quickly with a shared interface is the priority, React Native is considered.

Why are Swift and Kotlin chosen platform by platform?

Swift is iOS's own language and works directly with the system APIs; Kotlin plays the same role for Android. That choice means both operating systems' updates are picked up quickly and cleanly.

How does a native app reach device hardware (camera, sensors)?

The app connects to the hardware APIs the operating system provides, with no extra layer in between. That means camera, location, Bluetooth and other sensor data are processed with no lag and with full permissions.

How does building separately for two platforms affect maintenance costs?

Two separate codebases mean updates and bug fixes have to be repeated on each platform. That's assessed at the quote stage; the current cost items are in the pricing section.

Can we start with just iOS or just Android and add the other later?

Yes — starting with one platform and moving to the second on the strength of market feedback is a common strategy. The architecture is planned so the second platform can be added later.

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The detail

If you'd like to look before deciding

  1. 01

    Store Approval and Release

    The App Store and Google Play each assess every release against their own review criteria; privacy declarations, permission wording and icon standards differ by platform. In native development those requirements go into the app architecture from the start, which lowers the risk of rejection at review.

  2. 02

    Version Management and Device Compatibility

    Separate test matrices are built for different screen sizes, operating system versions and hardware capabilities. The native compiler makes it possible to optimize performance separately for each class of device, which secures stable running on older or lower-powered handsets too.

  3. 03

    Background Tasks and Notification Infrastructure

    Work that has to run in the background — location tracking, synchronisation, measurement — is adapted at native level to the operating system's energy management rules. The push notification infrastructure is also built on platform-specific services, keeping delivery rates high and latency low.

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Let's Talk About Your Native Project

If you're planning an app built for iOS and Android that uses the full power of the hardware, let's settle what you need together. The cost detail, which depends on scope and schedule, is in the pricing section.

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