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Kotlin Multiplatform App Development

Save up to 50% of development costs and keep native quality with Kotlin Multiplatform.
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What KMP Services Do You Get?

Cross-Platform Development

Build iOS and Android apps simultaneously using one shared Kotlin codebase. We reuse business logic across platforms while keeping native performance, ensuring faster delivery and fewer bugs.

API Integration for All Platforms

Integrate APIs once and deploy them everywhere: payments, logins, analytics, and more. With Kotlin Multiplatform, you reduce duplicate work and shorten QA time, leading to smoother releases and happier users.

Platform-Specific UI/UX

Deliver native look and feel for every platform. We share backend logic but design separate UIs for iOS and Android, so each app matches user expectations and platform guidelines perfectly.

Native Features Integration

Access full native capabilities, camera, GPS, push notifications, sensors, all without sacrificing shared code benefits. KMP gives you the best of both worlds: native power and cross-platform efficiency.

Kotlin Multiplatform Consulting and Migration

Already have a team but need to switch or scale to Kotlin Multiplatform? We help you migrate existing codebases, train developers, and stabilize ongoing projects to keep delivery on time and budget.

Technologies We Use

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Proven Expertise in Kotlin Multiplatform

Our senior developers are experts in Kotlin Multiplatform, with proven experience migrating complex apps. We ensure clean architecture, maintainable code, and native-level performance.

Reliable and Transparent Delivery

We work as an extension of your team, following your tools, processes, and reporting style. Your dedicated team is fully engaged from start to finish, and milestone-based updates keep every project on track.

Predictable Budget and Timelines

With a precisely defined project scope, you always know what you’re paying for. We help startups and enterprises plan ahead, cut unnecessary costs, and deliver fully functional cross-platform apps on time.

We'll Recommend the Best Migration Technology

Kotlin Multiplatform (KMP)

Ideal when you need to stay within budget while keeping native UI flexibility.

KMP allows you to share business logic across iOS and Android while still using native UI components,speeding up development without sacrificing performance.

Compose Multiplatform (CMP)

Perfect for teams that want a modern, shared UI and business logic in one codebase.

CMP enables you to build beautiful, responsive interfaces for both iOS and Android, reducing maintenance and accelerating releases.

If not knowing what to choose, here you can get more info about KMP vs CMP.

Flutter

Best for apps requiring a fully shared UI across iOS and Android, ensuring fast cross-platform development with near-native performance and a rich widget library.

React Native

A solid choice for projects that need quick time-to-market and strong community support,offering
a balanced mix of speed, performance, and reusable components.

Why choose us over others?

These are the benefits our clients value most and the main reasons we have successfully collaborated for many years:

Transparent Pricing

You get a clear budget from the start, so you always know where your money is going.

No Missed Deadlines

Consistent updates on app development ensure you remain in control of every step.

Ownership Mindset

We care about your project as much as you do, that is why we often overdeliver.

Why Choose Us Over Others?

These are the benefits our clients value most and the main reasons we have successfully collaborated for many years:

Proven Expertise in Kotlin Multiplatform

Our senior developers are experts in Kotlin Multiplatform, with proven experience migrating complex apps. We ensure clean architecture, maintainable code, and native-level performance.

Reliable and Transparent Delivery

We work as an extension of your team, following your tools, processes, and reporting style. Your dedicated team is fully engaged from start to finish, and milestone-based updates keep every project on track.

Predictable Budget and Timelines

With a precisely defined project scope, you always know what you’re paying for. We help startups and enterprises plan ahead, cut unnecessary costs, and deliver fully functional cross-platform apps on time.

Why Choose Aetherius for Your Cross-Platform Migration

These are the benefits our clients value most and the main reasons we have successfully collaborated for many years:

Transparent Pricing

20+ successful cross-platform projects delivered, including complex Kotlin Multiplatform (KMP) and Compose Multiplatform (CMP) apps for startups and enterprise clients.

No Missed Deadlines

Our clients typically cut development costs by 30-50 % and reduce time-to-market by up to 40 % after moving from native to cross-platform.

Ownership MIndset

Every project comes with a fixed, clearly defined estimate and a written guarantee of no hidden costs, backed by repeat clients and 5-star reviews.

"Aetherius helped the client improve revenue and customer ratings. The team always provided content on time and took the initiative to solve things really quickly."

Felix Wolf
Senior Consultant & Program Manager, Merkle DACH

"Aetherius' work achieved the correct functionality, satisfying the client's expectations, and planning to collaborate on a larger project in the future."

Mike Ralph
Managing Director, Band of Coders

"What stood out most about Aetherius was their exceptional adaptability and dynamic problem-solving approach."

Yogesh Veeraraj
CTO, Wheretogo

"I worked with Aetherius team on an early-stage project. They were great at taking direction and executing a functional prototype of our concepts.

Would love to work with his team again."

Dmitry Zolotaryov
Ex Engineering Manager at Kin Social

"We have had a great experience with Aetherius Solutions. Their skilled developers provided us with clear and detailed information, ensuring effective communication throughout the project.

I would highly recommend them for any project you might have."

Srdjan Miladinovic
Sales Operations Manager,Ingsoftware

"Aetherius team reassured us with their experience and knowledge that there are still companies that respect agreements. We successfully executed our plans, and the team followed our desires throughout, consistently working on the Salona application."

Djordje Dimitrijevié
Founder & CEO, Salona

"We had a specific industry problem and wanted to help people solve it with a unique app. Our first plan was to test the MVP version in a couple of smaller cities in Serbia, but we didn't expect to encounter such positive reactions from users so quickly. Aetherius Solution's team developed the first version in just 1 month with O bugs and issues!"

Katarina Ristic
Founder & COO, Znam Majstora

"Aetherius developers immediately identified why my app was experiencing bugs that had been a problem for over a year! After that, the number of downloads increased, and users told me it felt like they were using a completely new app. I especially appreciate their detailed reporting on the process."

Hristina Lazarevic Milosevic
Founder and CEO, Avoid Additives

"Aetherius successfully completed the app, meeting our expectations.

Moreover, the team communicated effectively and frequently via email and messaging apps, ensuring a smooth collaboration. Overall, their promptness and ability to deliver on time were hallmarks of their work."

Marija Milosevié
Owner of SmartBIN

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FAQ

Why choose Kotlin Multiplatform for cross-platform app development?
Can KMP speed up multi-client app delivery?
Compose Multiplatform vs Kotlin Multiplatform: which should I pick?
Kotlin Multiplatform vs Flutter: which is better for agencies?
Kotlin Multiplatform vs React Native: what’s the difference?
Does KMP support native features on iOS and Android?
Who uses Kotlin Multiplatform?
Is it KMM or KMP?
Read More

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