Kefelon
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Independent mobile studio · Istanbul

Apps that move you.

We design, build and launch mobile apps and games — from the first sketch to the store page, and every update after.

See our apps About the studio
Dopa: the home screen with four happy-hormone levels
Cutlane: a motorcycle weaving through traffic with a 12× combo
Cutlane: the garage with bike stats

Our apps

Every detail, considered.

Cutlane

Arcade racing · iOS & Android

Ride the traffic,
cut the lane.

One thumb, sixty seconds. Scrape past cars, chain near misses into combos — crash and the chain breaks.

Explore Cutlane
Download on the App Store Get it on Google Play
Cutlane: weaving through traffic with a 12× combo

Nine bikes. Seven worlds. One thumb.

Every bike has its own recorded engine. Sunset, desert, night city, rain — and it plays offline, in 14 languages.

Cutlane: seven worlds, from sunset to tunnel

Dopa

Wellbeing · iOS & Android

Meet your
happy molecules.

Write what you did in plain words. Dopa maps it to dopamine, serotonin, oxytocin and endorphins — and helps you keep them in balance with small daily habits.

Explore Dopa
Download on the App Store Get it on Google Play
Dopa: four happy-hormone levels and today's tasks

Four molecules. One calmer week.

Weekly mood patterns, a private journal and guided breathing — quietly, in one app.

Dopa: overall score and each molecule's weekly level

What we do

  1. 01

    Design

    Interfaces, motion and art direction — down to the app icon and the last store screenshot. Every screen checked on real devices, in every language we ship.

  2. 02

    Build

    Kotlin Multiplatform for apps, Unity for games. One codebase per product, native on iOS and Android, automated checks guarding every release.

  3. 03

    Launch

    Store listings in 14 languages, privacy done right, analytics that answer real questions — and steady updates long after day one.

2 apps14 languages per launchiOS & AndroidDesigned & built in-house

Work with us

Got an app idea? Let's build it together.

We take mobile products from a rough idea to the App Store and Google Play — design, code, launch — and keep them growing after day one. Tell us what you have in mind; the first conversation is free.

Start a project hello@kefelon.com
  • Product & UX designFlows, interface and prototypes — through to the app icon and store screenshots.
  • iOS & Android appsKotlin Multiplatform: one codebase, native look and feel on both platforms.
  • Mobile gamesUnity games from first prototype to live updates.
  • MVPs & AI featuresA focused first version to test with real users — AI included where it helps.
  • Launch & growthStore listings in many languages, ASO, analytics and privacy done right.

The studio

Small team. High bar.

Kefelon is an independent studio based in Istanbul, Türkiye. We make a few products and make them properly: a clear idea, an interface that feels right in one hand, and the unglamorous work — localization, accessibility, privacy, performance — done before anyone asks.

Each product is built end-to-end in-house, from the first prototype to the store page and the updates that follow.

Onur Emre Karadağ

Founder · Product, design & engineering

Based in
Istanbul, Türkiye
Platforms
iOS · Android
Stack
Kotlin Multiplatform · Unity
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