Native app

An iOS app is thus created in Swift (formerly Objective-C) with Apple's Xcode, an Android app in Kotlin (formerly Java) with Android Studio. The result is distributed via the App Store or Google Play and installed on the device.

The term deliberately distinguishes itself from two other ways of building an app: the cross-platform app (one code base for iOS and Android, for example with React Native or Flutter) and the web app / progressive web app (an application that runs in the browser). Anyone who wants to "have an app developed" makes exactly this decision as the first and most expensive choice: native, cross-platform or web-based.

What makes an app "native"

Technically, a native app is a program compiled for the target platform that directly accesses the operating system's programming interfaces (APIs). Three properties define it:

• Platform-specific language and tools: iOS in Swift with Xcode, Android in Kotlin with Android Studio. The code is compiled to native machine code, not interpreted.
• Direct hardware and system access: camera, GPS, Bluetooth, NFC, sensors, biometric authentication, push notifications and background processes are available without detours, including brand-new operating system functions on the day they are released.
• Platform-compliant operation: the app uses the native UI building blocks (SwiftUI/UIKit or Jetpack Compose) and therefore feels exactly as users are used to from the respective system: navigation, gestures, animations, typography.

It is precisely this direct line to the platform that is both a strength and a cost driver: it delivers maximum performance and depth of integration but requires a separate project for iOS and for Android.

The two native ecosystems differ noticeably. On the iOS side, Apple sets a narrow, well-documented framework: few device types, uniform screen formats and, with SwiftUI, a modern, declarative UI framework. This makes development predictable but requires compliance with strict App Store guidelines. On the Android side, the world is more open and diverse: thousands of device models from different manufacturers, different screen sizes and Android versions, plus its own modern toolkit with Kotlin and Jetpack Compose. This fragmentation increases the testing and adaptation effort but at the same time opens up more freedom in distribution and system integration. Anyone developing natively therefore not only builds twice but moves in two differently built worlds with their own conventions.

Native app vs cross-platform vs web app

The three approaches differ above all in reach, costs and technical depth. The following overview classifies them:

Cross-platform frameworks such as React Native and Flutter share 85 to 95 per cent of the code between both systems and reduce the initial costs compared with two native apps by roughly 30 to 50 per cent. Over the years, they have greatly narrowed the gap to native performance. The web app, in turn, avoids the app store completely but cannot use all device functions and can hardly be found in the store.

When a native app is worthwhile

Native development is the right choice if at least one of these points applies:

• Maximum performance: compute- or graphics-intensive applications such as elaborate games, augmented reality or real-time video processing.
• Deep hardware integration: intensive use of camera pipelines, Bluetooth peripherals, NFC or specialised sensors.
• Early access to new OS functions: anyone who wants to use a brand-new iOS or Android capability on the day it is released gets it natively first.
• Uncompromising platform aesthetics: when the app must feel one hundred per cent "at home" on every system.

For the vast majority of projects by mid-sized companies and founders (apps with lists, forms, user accounts, API connections and moderate complexity), on the other hand, cross-platform development is usually the better choice economically, because it serves both platforms from one budget.

Costs and effort of native development

The decisive cost factor of the native app is duplication: iOS and Android are separate projects with their own code, their own team know-how, their own release cycles and their own maintenance. In practice, the additional effort compared with a cross-platform app is around 30 to 50 per cent. A native app in the DACH region therefore typically starts at around 50,000 euros, while a comparable cross-platform app starts at around 30,000 euros. On top of this, for every app, native or not, comes ongoing maintenance of around 15 to 25 per cent of the initial development costs per year for updates, new operating system versions and bug fixes.

A practical example: a banking app with security requirements

A banking or payment app is a good example of a deliberately native decision. It requires deep integration into the device's security hardware (Secure Enclave at Apple, hardware keystore at Android), biometric authentication, certificate pinning and a fast, smooth response to every interaction. Here the native route pays off: the app uses the platform's own security mechanisms without an intermediate layer and receives new protective functions of the operating system immediately. A weather, appointment or catalogue app, on the other hand, does not need this depth; it is a classic cross-platform candidate.

The term "native" in cross-platform frameworks

Confusion often arises because cross-platform frameworks also advertise with the word "native". React Native, for example, renders real native UI components and integrates platform-specific code via so-called native modules; Flutter brings its own rendering engine, which compiles to native ARM code. Both therefore deliver apps that "look native", but in the narrower sense described here they are not native apps: they are created from a shared code base, not in the pure platform language for each system. In everyday use, "native app" means separate iOS and Android development, while "native-looking" describes the quality of the result of a cross-platform app.

Distribution and maintenance

Native apps are delivered via Apple's App Store and Google Play. Both stores have their own approval processes, guidelines and review times, which belong in project planning. After the launch, operation begins: every new iOS or Android version may require adjustments, and with native development these have to be implemented and tested separately for both platforms. Anyone who does not plan for ongoing maintenance accumulates technical debt that makes later updates expensive. The official developer documentation from Apple and Android offers sound technical guidance on the platform APIs.

Advantages and limits of the native app

The strengths of the native app lie where an app really has to push the device to its limits. Because it talks directly to the operating system without an intermediate layer, it achieves the highest performance, the smoothest animations and the shortest response times, which is noticeable with elaborate interfaces, long lists and compute-intensive processes. It uses every device function completely and gets new platform capabilities first. And it fits seamlessly into users' expectations: an iOS app that feels like an iOS app and an Android app that follows Material Design conventions seem familiar and confident. This uncompromising user experience is one of the main reasons why established brands with high quality standards often develop natively.

The limits are just as clear and almost always economic in nature. Two separate code bases mean twice the development time, twice the specialist knowledge in the team and twice the maintenance effort. A function that is to appear in both apps has to be built twice and tested twice; a bug can occur differently on the two platforms. This lengthens the time to market and ties up more budget over the entire lifetime. For a product that is to appear quickly and cost-consciously on both platforms and has no extreme technical requirements, this effort is rarely justified; this is where cross-platform development plays to its strengths.

Native apps and quality assurance

An often underestimated aspect of native development is testing. Because iOS and Android are separate, quality assurance has to take place on real devices in both worlds: different screen sizes, operating system versions, manufacturer customisations (especially in the Android ecosystem with its great diversity of devices) and real network conditions. What works in the simulator can look different on a specific device. Serious native projects plan this effort separately for both platforms; bugs that are not found here otherwise end up in the app store reviews and cost reach. This is another reason why the choice between native and cross-platform is always also a question of the available testing and maintenance budget, not just the initial development.

Frequently asked questions about native apps

What is the difference between a native app and a cross-platform app?
A native app is developed separately for each operating system in its own language (iOS in Swift, Android in Kotlin). A cross-platform app uses a common code base for both systems. Native offers maximum performance and depth of integration at higher cost; cross-platform saves budget and time with quality that is more than sufficient for most apps.

Is a native app always better than a cross-platform app?
No. "Better" depends on the use case. For compute- or graphics-intensive apps and deep hardware integration, native is superior. For most business, service and content apps, cross-platform delivers comparable quality at considerably lower cost.

What does a native app cost?
In the DACH region, native apps typically start at around 50,000 euros, because iOS and Android are separate projects. The exact price depends on the range of functions, back-end complexity and design requirements. On top of this comes around 15 to 25 per cent of the development costs per year for maintenance.

Do I need two native apps for iOS and Android?
With purely native development, yes; that is precisely the cost point. Anyone who wants to serve both platforms from one budget chooses a cross-platform solution with a shared code base instead.

Can a native app also work offline?
Yes. Native apps can store data locally on the device and are therefore independent of a constant internet connection, an advantage for example for field sales, stocktaking or field service applications.