Skip to content
IJK

Tech Choice

Kotlin vs Swift vs Flutter — A Founder's Guide

Kotlin builds native Android only. Swift builds native iOS only. Flutter builds both from one codebase. The real question isn't which language is 'best' — it's how many platforms you need and how much budget you have to build them separately.

By IJK ·

Kotlin (Android native) — when it's the right call

Kotlin is Google's preferred language for Android development — it compiles directly against the Android SDK with no cross-platform layer in between. Pick it when Android is your only platform, or when your app leans on Android-specific features (widgets, deep OS integrations, background services) that benefit from direct SDK access. See our Android pricing.

Swift (iOS native) — when it's the right call

Swift is Apple's language for iOS, iPadOS, and macOS — same logic as Kotlin, just on the other platform. Pick it when iOS is your only platform, or when the app needs to feel exactly like a first-party Apple app, using SwiftUI and native APIs directly. See our iOS pricing.

Flutter — when cross-platform wins

Flutter uses Dart to build one codebase that ships to both the Play Store and App Store. It's the right call the moment you need both platforms and don't want to pay for two separate native builds — see our Flutter pricing and our native vs Flutter breakdown for the deeper tradeoffs.

What we actually recommend founders ask first

Don't start with "which language is better" — start with:

  • How many platforms do you need at launch?
  • What's your budget for the first build?
  • How fast do you need to be in both stores?

Answer those three, and the language question mostly answers itself. One platform → native. Both platforms, limited budget or timeline → Flutter.

ShareXLinkedIn

Questions we get
asked first.

Pinned to the wall, in the order people ask. Tap a note to read the answer.

  • It's a legitimate long-term choice, not just a shortcut — Google maintains it actively and plenty of production apps at scale run on it. The main tradeoff is deep native integrations take more work than in a pure native codebase.

  • Yes — Kotlin for native Android, Swift for native iOS, and Flutter for cross-platform builds. We'll recommend the right one for your specific situation during scoping.

  • You can, but it's a rewrite of the UI and platform-specific logic, not an upgrade path. Most teams only do this if a specific feature genuinely needs native-only capabilities.

  • Flutter, if you're on both platforms — one codebase means one place to fix bugs and ship features. If you're only ever going to be on one platform, native has no cross-platform overhead to begin with.

Keep reading.

Start a project

Have an idea
worth building?

Let's turn it into something real.

Start a projectletsbuild@ijktec.com

Want to talk this through?

Talk Through Your Project