Softwr

Mobile Development · head to head

Kotlin Multiplatform vs React Native

Kotlin Multiplatform logo

Kotlin Multiplatform

Mobile Development

JetBrains-funded technology for sharing Kotlin business logic across iOS, Android, web, desktop and server

From
Free
Rated
-
Full reviewWebsite
React Native logo

React Native

Mobile Development

Build native mobile apps with React and JavaScript

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Kotlin Multiplatform it shares logic, not UI, by default, so a team expecting a Flutter-style single UI codebase has to also adopt Compose Multiplatform, which is newer and less proven on iOS than on Android.; React Native the JavaScript bridge has historically been a bottleneck for animation-heavy and list-heavy screens, though the New Architecture addresses much of it
  • They diverge on capability: Kotlin Multiplatform covers Shared Kotlin logic, React Native covers Renders to native components.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kotlin Multiplatform and React Native actually diverge.

Attributes where Kotlin Multiplatform and React Native differ
AttributeKotlin MultiplatformReact Native
PlatformsiOS, Android, Windows, macOS, Linux, WebiOS, Android, Windows, macOS, Web

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated), category (Mobile Development).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Kotlin Multiplatform

  • Shared Kotlin logic
  • Native UI retained
  • Compose Multiplatform (optional)
  • IDE tooling
  • Gradle-based builds
  • Incremental adoption

Only in React Native

  • Renders to native components
  • React programming model
  • Native modules
  • Fast Refresh
  • Wide platform reach
  • Large package ecosystem

What people use each for

The jobs each tool is most often brought in to do.

Kotlin Multiplatform

  • A company with existing separate native iOS and Android codebases wanting to stop duplicating business logic and networking codenot React Native
  • A team that wants shared logic but is not willing to compromise on fully native UI per platformnot React Native
  • An organisation already using Kotlin on the backend that wants to reuse the same models and validation on mobile clientsnot React Native
  • A team evaluating Compose Multiplatform for UI sharing but wanting the option to fall back to native UI per screennot React Native

React Native

  • Teams with React experience on the web extending into mobilenot Kotlin Multiplatform
  • Apps that should feel like the platform rather than look identical across bothnot Kotlin Multiplatform
  • Adding a mobile client to a product whose engineers already write JavaScriptnot Kotlin Multiplatform
  • Reusing business logic between web and mobile codebasesnot Kotlin Multiplatform

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Kotlin Multiplatform

  • It shares logic, not UI, by default, so a team expecting a Flutter-style single UI codebase has to also adopt Compose Multiplatform, which is newer and less proven on iOS than on Android.
  • iOS interop relies on Kotlin/Native compiling to a framework consumed from Swift, and debugging across that boundary is more friction than debugging pure Swift or pure Kotlin.
  • Because logic-sharing is the whole premise, teams still need genuine iOS and Android UI expertise on staff; it does not reduce the native skills bar the way a full cross-platform UI framework aims to.
  • Build times and tooling maturity for multiplatform Gradle projects lag behind single-platform Kotlin or Swift projects, and multiplatform-specific build errors are less well documented.
  • JetBrains funds it as part of the broader Kotlin investment, so its roadmap priority competes internally with IntelliJ, Android Studio and other JetBrains commitments rather than having dedicated headcount the way Flutter has at Google.

React Native

  • The JavaScript bridge has historically been a bottleneck for animation-heavy and list-heavy screens, though the New Architecture addresses much of it
  • Upgrading between versions has a reputation for being painful, particularly with many native dependencies
  • Anything the framework does not wrap requires native code in Swift or Kotlin, so a purely JavaScript team can still get stuck
  • Because it renders to real platform components, small behavioural differences between iOS and Android surface in your code rather than being hidden

Pricing, plan by plan

Kotlin Multiplatform

Free
  • Kotlin MultiplatformFree
    • Apache 2.0 licensed, unlimited apps
    • IDE tooling in the free Android Studio and free-tier IntelliJ IDEA Community
    • No paid Kotlin Multiplatform edition exists

React Native

Free
  • React NativeFree
    • Full framework
    • iOS and Android targets
    • Native module system

Which should you pick?

Choose Kotlin Multiplatform if

  • You need shared kotlin logic.
  • You want to start without paying.
  • You work on iOS, Android, Windows, macOS, Linux, Web.
  • You also want native ui retained.
Kotlin Multiplatform review

Choose React Native if

  • You need renders to native components.
  • You want to start without paying.
  • You work on iOS, Android, Windows, macOS, Web.
  • You also want react programming model.
React Native review

Questions people ask

Is Kotlin Multiplatform or React Native better?
Neither clearly leads. Kotlin Multiplatform starts at Free and React Native at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kotlin Multiplatform or React Native?
Kotlin Multiplatform starts at Free and React Native at Free.
Does Kotlin Multiplatform or React Native run on more platforms?
Kotlin Multiplatform runs on iOS, Android, Windows, macOS, Linux, Web. React Native runs on iOS, Android, Windows, macOS, Web.
Can I use Kotlin Multiplatform for free?
Both have a free tier, so you can try either at no cost before committing.
What is Kotlin Multiplatform best used for?
Kotlin Multiplatform is most often used for a company with existing separate native ios and android codebases wanting to stop duplicating business logic and networking code, a team that wants shared logic but is not willing to compromise on fully native ui per platform, an organisation already using kotlin on the backend that wants to reuse the same models and validation on mobile clients, a team evaluating compose multiplatform for ui sharing but wanting the option to fall back to native ui per screen. Of those, a company with existing separate native ios and android codebases wanting to stop duplicating business logic and networking code and a team that wants shared logic but is not willing to compromise on fully native ui per platform are not what React Native is typically brought in for.
What can Kotlin Multiplatform do that React Native cannot?
Kotlin Multiplatform covers Shared Kotlin logic, Native UI retained, Compose Multiplatform (optional), IDE tooling. React Native covers Renders to native components, React programming model, Native modules, Fast Refresh.

Answered from the vendors’ own pages

Kotlin Multiplatform: Does Kotlin Multiplatform replace my native UI code?

Not by default. It shares business logic and data layers; UI stays native per platform unless you separately adopt Compose Multiplatform.

React Native: Is React Native free?

Yes. React Native is open source from Meta with no licence fee, and it is free for commercial use.

Kotlin Multiplatform: Is there a paid version?

No. It is Apache 2.0 licensed and free, funded by JetBrains as part of the Kotlin project.

React Native: Does React Native produce a real native app?

Yes. JavaScript primitives render to the platform’s own UI components using the same native APIs a Swift or Kotlin app would call, rather than to a web view.

Kotlin Multiplatform: Do I need Compose Multiplatform to use it?

No, they are separate. You can share only logic and keep fully native UI on each platform indefinitely.

React Native: Which well-known apps use React Native?

Meta cites Facebook, Microsoft Office, Teams and Outlook, Amazon Shopping, Discord, Coinbase and Tesla among thousands of apps built with it.

React Native: Should I use Expo or plain React Native?

Expo handles builds, updates and native configuration for you and is the recommended starting point. Plain React Native gives full control of the native projects, which matters when you need native code the managed workflow does not cover.

Share

Related pages

More on Kotlin Multiplatform

More on React Native

Keep looking

Other head to heads