Flutter shares
All screens and widgets, navigation, business rules and networking, in one Dart codebase drawn by Flutter's rendering engine on every platform.
Choosing a framework
Kotlin Multiplatform vs Flutter for business apps.
Both let one team ship Android and iOS. They get there in opposite ways, and for an operational business app that difference decides cost, risk and how the app feels to the people who use it every day. This is the comparison from a studio that builds Kotlin Multiplatform and will say when Flutter is the better call.
The short answer
Flutter shares the interface and draws it itself. Kotlin Multiplatform shares the logic.
Flutter apps are written in Dart and render every pixel with Flutter's own engine. Kotlin Multiplatform shares business logic in Kotlin and, by default, lets each platform draw its own native interface.
Kotlin Multiplatform shares
Domain models, business rules, validation, networking and the local database in Kotlin. Screens can stay native, or be shared with Compose Multiplatform when that is the better trade.
What that means for you
Flutter gives one interface to build and maintain. Kotlin Multiplatform gives one set of rules that cannot drift between Android and iOS, with interfaces that follow each platform's own conventions.
Where each one breaks
The failure modes to plan for.
Flutter: the platform is imitated
Flutter redraws native controls rather than using them, so platform conventions, accessibility behaviour and new OS features arrive when the framework catches up.
Flutter: a separate language
Dart is used almost only for Flutter. Native Android and iOS knowledge still matters for anything below the interface, through plugins and platform channels.
KMP: more interface work if you keep it native
Sharing only the logic means building two interfaces. That is the price of a fully native feel; Compose Multiplatform removes it when a shared interface is acceptable.
KMP: two build systems
iOS builds go through Xcode and Gradle together. It is well supported, but the team needs someone comfortable on both sides.
Choosing in ten minutes
Four questions that settle it.
Where does the value sit?
Mostly in screens and content: Flutter. Mostly in rules, money, state and sync: Kotlin Multiplatform.
Do you already have a Kotlin Android app?
Then Kotlin Multiplatform extends it. Flutter replaces it.
How native must it feel?
Field teams, accessibility needs and heavy use of the camera, location or background work favour native interfaces.
Does it work offline?
Offline-first data and sync rules are logic. Writing them once in Kotlin is where KMP pays back most. How offline-first works.
Our position
We build Kotlin Multiplatform, and we will tell you when not to.
Our operational products, like D. Delivery and PropFix, run on shared Kotlin because their value is in rules that must not drift: dispatch, proof of work, payments. For a content-led app with little logic and one design for both platforms, Flutter is a reasonable choice and we will say so in the first call.
Kotlin Multiplatform
See the service
Our KMP service
How we split shared logic from native interfaces, the stack we use, and what a project costs.
Comparison
Read the article
KMP vs React Native
The same question against React Native: what each shares and where each one breaks.
Pricing
See pricing
What an app costs
Published prices for the Clarity Sprint and full builds.
FAQ
Questions people ask first.
Is Kotlin Multiplatform better than Flutter?
Neither is better in general. Flutter is faster when the product is mostly screens and one shared interface is the goal. Kotlin Multiplatform is the stronger choice when the value sits in business rules, offline data and platform behaviour that must stay native.
Can Kotlin Multiplatform share the interface like Flutter?
Yes, if you want it to. Compose Multiplatform lets a KMP project share screens across Android and iOS. The difference is that it is optional: you can share only the logic and keep a native interface where it matters.
Which is cheaper to build?
For an interface-heavy app with little logic, Flutter is usually cheaper to start. For an operational app where a wrong rule costs money, sharing the logic with Kotlin Multiplatform tends to cost less over the life of the product, because rules are written and fixed once.
We already have an Android app. Which should we choose?
If it is written in Kotlin, Kotlin Multiplatform is the natural next step: the domain and data layers can move into a shared module while the Android app keeps working. Moving to Flutter means rewriting the app in Dart. See moving an Android app to Kotlin Multiplatform.
Start the conversation
Not sure which side of the line your product sits on?
Twenty minutes is usually enough to tell. We will give you a straight recommendation, even if it is not Kotlin Multiplatform.