Native App Development (Swift & Kotlin)
Native app development means writing an iOS app in Swift and an Android app in Kotlin, on each platform's own SDK. We build for both platforms, and this page sets out where native earns its cost.
Native app development means writing an iOS app in Swift and an Android app in Kotlin, each built on its own platform SDK. Apple's toolkit is Swift with SwiftUI; Google's is Kotlin with Jetpack Compose. Code written this way compiles for one platform, reaches every device API that platform exposes, and follows that platform's own interface conventions.
We build mobile apps for both platforms, native and cross-platform, working directly with both platform SDKs. Most of what we ship is cross-platform, in React Native or Flutter, because one shared codebase covering both app stores usually makes the best use of a budget. Native is the stronger answer on a particular set of projects, and this page sets out which ones. Tell us what the app has to do and we will give you a straight recommendation either way.
When native earns its place
Three situations where Swift and Kotlin earn their cost.
Deep hardware and sensor work
Some apps live closer to the device than the average app store download. Continuous Bluetooth Low Energy links to medical or industrial kit, NFC, background location that has to survive the operating system's power management, custom camera pipelines, on-device machine learning. Cross-platform frameworks reach most of this through bridges, and the bridges are usually fine. When the device connection is the product rather than a feature of it, writing straight against Core Bluetooth or Android's own APIs removes a layer you would otherwise be debugging at the worst possible moment. The wider connected-device picture is on our Internet of Things page.
Watches, TV and platform-only surfaces
A phone app is no longer the whole job. watchOS and Wear OS companions, tvOS, home-screen widgets, lock-screen Live Activities, App Clips, CarPlay and Android Auto are each built with their own platform's tools. A cross-platform framework can ship the phone app and leave those surfaces to a small amount of native code, which is often the sensible split. If the watch or the widget is the main event, though, the phone app becomes the companion, and it makes more sense to start native than to bolt native onto something else.
Graphics, AR and tight performance budgets
Most business apps are lists, forms, maps and dashboards, and cross-platform frameworks render those at a speed no user can tell apart from native. The gap shows up elsewhere: real-time camera effects, augmented reality through ARKit or ARCore, 3D and game-style rendering through Metal or Vulkan, heavy on-device processing, or an animation budget where a dropped frame counts as a defect. Native gives you the graphics stack directly, with no bridge between your code and the hardware. If your app has one demanding screen and twenty ordinary ones, that is worth knowing before you commit the whole build.
Native, React Native or Flutter: how to choose
There is no universally right answer, only a fit between the app and the constraint that matters most on your project. In most cases cross-platform wins on these four points, which is why it is our default:
- Two platforms, one budget — you need iOS and Android, and paying for one client-side build instead of two frees money for the back end, the design and the years of support that follow.
- Standard interface work — lists, forms, dashboards, maps, chat, payments and photo capture are all well served, and your users will not be able to tell.
- Speed to a first release — one codebase, one test pass, one release cycle. Our rapid MVP sprints run this way for that reason.
- A small team maintaining it — one language and one repository is easier to keep alive over five years than two of each.
When native is the better call
Four things flip the decision the other way. If one of them describes your project, the extra build is usually money well spent rather than a preference:
- The device is the product — sustained Bluetooth, NFC, background sensors or a custom camera pipeline sit at the centre of what the app does.
- A watch, TV or in-car app is the main surface, not an extra hung off the phone app.
- There is a real performance or graphics budget — AR, 3D, live video effects, or frame timing written into the specification.
- Only one platform matters — an internal iOS-only fleet or an Android-only handheld has no second platform to share code with, so the main argument for cross-platform disappears.
A fifth, smaller one: if you need whatever Apple or Google announced this month, native gets it on day one, while the framework ecosystem takes a while to catch up.
The middle path is often the right one
You do not have to choose once and live with it. A React Native or Flutter app can call native Swift or Kotlin modules for the parts that need them, so the demanding tenth of the app is written natively and the rest stays shared. Most apps that "need native" only need it in one place, and finding that place early is cheaper than discovering it after launch.
If you are weighing up the formats themselves, our article on choosing between web, native and hybrid apps goes through the trade-offs, and the React Native, Flutter, iOS and Android pages explain how we work on each.
Not sure which approach fits your app?
Tell us what the app has to do and which devices it has to run on. We will give you a straight answer on whether native is worth the extra build, or whether cross-platform gets you there for less.
Native App Development Questions We Get Asked
Native app development means building a separate app for each platform in that platform's own language and tools: Swift and SwiftUI for iOS, Kotlin and Jetpack Compose for Android. The result is compiled for one platform, has direct access to its device APIs, and follows its interface conventions. The trade-off is that iOS and Android become two builds rather than one.
Mostly, yes, and the naming trips people up. React Native renders real platform interface components rather than a web page inside a wrapper, so what the user installs behaves like a native app. What it is not is written in Swift or Kotlin: the logic lives in JavaScript and reaches device APIs through a bridge. For most apps that distinction never surfaces. It surfaces when you need something the bridge does not cover, or when performance is measured in frames. There is more on our React Native page.
Usually yes, for the part of the app that runs on the device. You are commissioning two apps instead of one — two codebases, two test passes, two release cycles — while the back end, the design and the project work are shared either way. We start from what the app has to do rather than from a default, and we will tell you where that extra spend buys you something real. Our app development cost page explains what moves the numbers.
Yes, and it is a common route. A React Native or Flutter app can load native Swift or Kotlin modules, so a demanding feature — a Bluetooth stack, a camera pipeline, a watch companion — is written natively while the rest of the app stays shared. Going the other way, rewriting a finished app from cross-platform to fully native, is far more expensive. It is worth raising the hardware question before the first line of code.
Yes. We build for iOS and Android, work directly with both platform SDKs, and release to both app stores. Most of the apps we deliver are cross-platform in React Native or Flutter, because that usually suits the brief and the budget, and we take on native work where a project calls for it — whole native builds as well as native modules inside a cross-platform app. Tell us what the app has to do and which devices it has to run on, and we will be straight with you about the right route.
Not always. If people need it on a phone but you are not leaning on the camera, the sensors or offline storage, a progressive web app skips the app stores entirely and updates the moment you deploy. Web, native and hybrid each suit different jobs; our article on choosing between web, native and hybrid apps sets out the trade-offs, and our mobile app development page covers what we build either way.
Experience Delivering
Features we regularly build into mobile apps, whether the build is native, React Native or Flutter. The full list is on our capabilities page.
Discover How Scorchsoft Can Help
We would love to hear about your project. Please contact us and share your goals; we'll respond with our thoughts and a rough cost estimate. Scorchsoft is a UK-based team of web and mobile app developers and designers. We operate in-house from Birmingham, and our offices are located in the heart of the Jewellery Quarter.
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