What Is Android and How Does It Fit Into Mobile App Development?
Android is a mobile operating system, developed by Google, that runs on phones, tablets, and other devices — and it is one of the two primary target platforms for any mobile app, alongside iOS. If you are deciding how to build an app, Android matters because it determines your development language, your toolchain, and how you ship to users. You can build for Android natively (typically with Kotlin) or through a cross-platform framework like Flutter, which produces a single codebase for both Android and iOS. The right choice depends on your performance needs, budget, timeline, and how much platform-specific functionality you require.
Android's role in the mobile landscape
Android is an operating system, not a programming language or a framework. That distinction matters because people often conflate the platform with the tools used to build for it.
- The platform: Android is the OS layer that manages hardware, permissions, app lifecycle, and the user interface on a device.
- The apps: Applications are separate software packages installed onto that OS.
- The languages: Android apps are commonly written in Kotlin (Google's preferred language) or Java, though other languages and frameworks can target the platform.
Because Android and iOS together cover essentially the entire smartphone market, most businesses treat them as the two default platforms to support. The question is rarely whether to be on Android, but how to build for it.
How Android apps get built: native vs. cross-platform
There are two broad routes, and they trade off differently.
Native Android development
Native means writing code specifically for the platform — for Android, that is typically Kotlin (with Java still in use on older codebases). Locomotive Mobile describes its native offering as "Native solutions for iOS (Swift) and Android (Kotlin) with maximum performance," listing maximum performance and advanced features as the benefits.
Choose native when you need:
- The highest possible performance and the tightest hardware integration
- Platform-specific features and APIs that cross-platform frameworks may not fully expose
- Long-term maintenance by teams specialized in one platform
The cost is that you maintain separate codebases for Android and iOS, which generally means more development effort and a longer path to launching on both.
Cross-platform development with Flutter
Flutter lets you build one codebase that runs on both Android and iOS. Locomotive Mobile positions it as "Cross-platform apps with native performance and a single codebase," with the stated advantages of optimized performance, simplified maintenance, and reduced time to market.
Choose cross-platform when you need:
- To reach both Android and iOS users without duplicating effort
- Faster time to market and lower maintenance overhead
- A consistent experience across platforms
The trade-off is that you may hit limits when you need deep, platform-specific behavior, and performance — while strong — is not always identical to fully native code.
| Dimension | Native Android (Kotlin) | Flutter (cross-platform) |
|---|---|---|
| Codebase | Separate per platform | Single codebase for Android + iOS |
| Performance | Maximum, per Locomotive Mobile | "Native performance," per Locomotive Mobile |
| Time to market | Longer (two builds) | Reduced |
| Maintenance | Higher (two codebases) | Simplified |
| Best fit | Platform-specific, performance-critical apps | Apps targeting both platforms efficiently |
How Android differs from iOS in practice
If you are planning a project, these are the practical differences that affect your decisions:
- Language and toolchain: Android development centers on Kotlin (or Java); iOS centers on Swift. Locomotive Mobile frames its native work as "Swift for iOS" and "Kotlin for Android."
- Development effort: Building natively for both platforms means two separate efforts. A cross-platform approach like Flutter collapses that into one.
- Release process: Each platform has its own store and review process, so shipping to both means managing two distribution channels.
The takeaway: Android and iOS are distinct targets with distinct native languages, which is exactly why cross-platform frameworks exist — to avoid maintaining two separate codebases when you don't need to.
How to decide for your project
Work through these questions:
- Do you need both Android and iOS? If yes, cross-platform (Flutter) usually reduces time and cost. If you only need one platform, native may be simpler.
- Do you need maximum performance or deep platform-specific features? If yes, lean native. If your app is standard — content, community, forms, commerce — cross-platform is typically sufficient.
- What is your timeline and budget? A single codebase generally means less work and faster launch, which matters if you are validating an idea.
- What is your long-term maintenance capacity? Two native codebases require more ongoing effort than one shared codebase.
A reasonable default for many teams building a new app for both platforms is to start with Flutter and move to native only where a specific requirement demands it. For apps where performance or platform integration is the core value, native Android (Kotlin) is the stronger foundation.
If you are unsure, a technical consulting step — analyzing requirements, architecture, and performance needs — is the standard way to settle the native-versus-cross-platform question before committing to a build.