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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.

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.

Apps We Built For Clients

“Aetherius built SDKs for our apps across multiple platforms. The development process was smooth, and working with their team was a good experience from start to finish. Any questions we had were handled quickly.”

Igor Lyubimov
Founder & CEO at web2wave

"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 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

"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

All Technologies
We Work With

Aetherius Solutions | Kotlin Logo
Kotlin
Android Development
Aetherius Solutions | Swift Logo
Swift
iOS Development
Aetherius Solutions | Swift UI Logo
Swift UI
iOS Development
Aetherius Solutions | Kotlin Logo
Kotlin
Android Development
Aetherius Solutions | Swift Logo
Swift
iOS Development
Aetherius Solutions | Swift UI Logo
Swift UI
iOS Development
Aetherius Solutions | Flutter Logo
Flutter
Cross-platfrom Development
Aetherius Solutions | React Logo
React Native
Cross-platfrom Development
Kotlin Multiplatform
Cross-platfrom Development
Aetherius Solutions | Compose logo
Compose Multiplatform
Cross-platfrom Development
Aetherius Solutions | Flutter Logo
Flutter
Cross-platfrom Development
Aetherius Solutions | React Logo
React Native
Cross-platfrom Development
Kotlin Multiplatform
Cross-platfrom Development
Aetherius Solutions | Compose logo
Compose Multiplatform
Cross-platfrom Development
Aetherius Solutions | OBJ Logo
Objective-C
iOS Development
Aetherius Solutions | Node Logo
Node.js
Backend Development
Aetherius Solutions | JS Logo
JavaScript
Backend Development
Aetherius Solutions | OBJ Logo
Objective-C
iOS Development
Aetherius Solutions | Node Logo
Node.js
Backend Development
Aetherius Solutions | JS Logo
JavaScript
Backend Development

Our Development Process

01
Discussing Your Vision and Requirements

We start by listening to your goals and specific needs, ensuring we understand your app’s vision clearly.

02
Planning

Based on the gathered information, you get a detailed project plan, including a precise timeline, cost estimation, and defined milestones, ensuring full transparency.

03
Development

Our team begins the design and development phase, keeping you involved at every stage with regular progress updates and the opportunity for feedback to ensure alignment with your goals.

04
Testing

Before launch, the app goes through rigorous testing to ensure it meets the highest standards of functionality, performance, and user experience, eliminating bugs or issues.

05
Launching

Once everything is ready, we take care of the deployment process, making sure it’s properly set up on app stores or other platforms.

06
Maintenance

After launch, we offer continuous support to ensure your app stays up-to-date and runs smoothly, adapting to your needs over time.

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

Tell us about your project

You’re one step away from getting the right developers.

"Working with Aleksa and his team at Aetherius has been a great pleasure! He is very understanding, especially for people like me who aren't tech savvy, makes time to work on issues that come up, and is always willing to work hard to find a solution."

Erkin Jumayev
Erkin Jumayev
Co-Founder of Mindguard

"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
Dmitry Zolotaryov
Ex Engineering Manager at Kin Social

"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. Their team is reliable and truly cares about the success of my app!"

Hristina Lazarević Milosević
Hristina Lazarević Milosević
Founder and CEO, Avoid Additives

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

Yogesh Veeraraj
Yogesh Veeraraj
CTO, Wheretogo

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

Mike Ralph
Mike Ralph
Managing Director, Band of Coders

“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 0 bugs and issues!”

Katarina Ristić
Katarina Ristić
Founder & COO, Znam Majstora

"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
Srdjan Miladinovic
Sales Operations Manager, Ingsoftware

"Aetherius Solutions 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
Felix Wolf
Senior Consultant & Program Manager, Merkle DACH

"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 Milošević
Marija Milošević
Owner of SmartBIN

"Aetherius Solutions 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 Dimitrijević
Djordje Dimitrijević
Founder & CEO, Salona

"Their team was very easy to work with, and they genuinely cared about the success of our project. They managed the project efficiently, kept us updated regularly, and always responded quickly to changes or feedback."

Nemanja Dimic
Nemanja Dimic
Founder & CEO, BIT Events
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