12 Best Mobile App Development Companies in Eastern Europe

Key Takeaways on the Best Mobile App Development Companies in Eastern Europe

• Gauss - Croatia's premier mobile development firm with ISO 27001/9001 certifications delivers sophisticated IoT-integrated solutions for enterprise clients across US, Germany, UK, and Switzerland, offering the best value starting at $10,000+

• Sigma Software Group - Massive 2,100-person consultancy across 43 offices combines Swedish business culture with Microsoft Gold Partner status to handle Fortune 500 enterprise projects

• Droids On Roids - Award-winning Polish agency whose open-source libraries power Facebook, WhatsApp, and TikTok, with 130+ launched apps and proprietary TAP methodology

• SolveIt - Warsaw-based team with 100% client satisfaction specializes in healthcare and energy solutions that deliver measurable outcomes like 26% electricity savings

• Empat - Ukrainian startup studio created Obimy app that topped US App Store ahead of Tinder and Netflix, serving 10M+ users while supporting Ukraine's military efforts

• WOLFPACK DIGITAL - Romanian agency serving 5 million monthly users won European Technology Awards and 2024 Webby Award for AI-powered mobile solutions

• LeanCode - Poland's leading Flutter consultancy organizes world's largest Flutter conference and built one of the largest Flutter banking apps globally for Credit Agricole

• Netguru - B Corporation with 400+ specialists transformed UBS mobile banking and achieved 116% subscription growth for Otodom marketplace

• Tapptitude - Product partner focused on first 1000 days of development built 120+ products including million-user platforms Glorify and Imobiliare.ro

• Uptech - Collaborative partner behind GOAT sneaker marketplace (30M+ users across 170 countries) embeds deeply with client teams to build category-defining products

• itCraft - Security-focused Polish team with perfect 5.0 Clutch rating delivered award-winning B2B apps serving 105K+ monthly users

• SoftwareHut - Remote-first problem solvers specialize in mission-critical applications including nationwide crisis management platforms for government authorities

1. Gauss

• Founded: 2012

• Location: Osijek, Croatia

• Website:gauss.hr

• Specializes In: Mobile application development, IoT platform integration, custom business solutions

• Services: Mobile app development, IoT platform development, custom software development, web development, quality assurance, consultation, cloud-based business management platforms (Gauss Box), design and documentation, project management, support and maintenance

• Starting Price: $10,000+

• Notable Work: Moj Unikom mobile app for waste management services, WaterQ mobile platform for real-time water quality monitoring with IoT integration

We've evolved from a web solutions company into a specialized mobile app development firm serving international clients across the US, Germany, UK, and Switzerland.

With ISO 27001 and ISO 9001 certifications ensuring information security and quality management, we bring over a decade of proven expertise to complex mobile app projects.

Our portfolio showcases sophisticated capabilities in IoT integration, real-time data processing, and multi-platform development, making us an excellent choice for Western companies seeking experienced Eastern European development partners who can handle enterprise-level mobile solutions with full project lifecycle support.

2. Sigma Software Group

• Founded: 2002

• Location: Kharkiv, Ukraine (Corporate Headquarters)

• Website: sigma.software

• Specializes In: Mobile app development, Last-mile delivery platforms, Smart city IoT solutions

• Services: Mobile app development, custom software development, web development, IT staff augmentation, e-commerce development, platform redesign and maintenance, IoT platform development, API development, BI & big data consulting

• Starting Price: $50,000+

• Notable Work: ANGEL last-mile delivery platform with 80+ retailer integrations, Smart street lighting platform for smart cities

Operating with over 2,100 professionals across 43 offices in 21 countries, Sigma Software Group stands as one of Europe's most substantial IT consultancies serving Fortune 500 enterprises and startups alike.

As part of a leading Scandinavian technology consulting group, they combine Swedish business culture with technical expertise to deliver comprehensive mobile and web solutions.

Their proven track record includes complex platform integrations, IoT implementations for smart cities, and enterprise-level mobile applications with sophisticated backend systems.

With ISO 9001:2015 and ISO 27001 certifications plus Microsoft Gold Partner status, they're well-positioned for large-scale mobile development projects that require both technical excellence and global delivery capabilities.

3. Droids On Roids

• Founded: 2011

• Location: Wrocław, Poland

• Website: thedroidsonroids.com

• Specializes In: Mobile app development, E-commerce applications, FinTech solutions

• Services: Mobile app development, custom software development, UX/UI design, e-commerce development, IoT development, API development, application testing, IT staff augmentation, web development, application management & support

• Starting Price: $75,000+

• Notable Work: CCC Shoes & Bags mobile commerce app for Central Europe's largest footwear retailer, Grapes wine shopping app

Wrocław's thriving tech hub houses this premium mobile development partner with over 130 launched applications.

Twice recognized among Deloitte's "50 Fastest Growing Companies in Central and Eastern Europe" and featured on Clutch's 100 Fastest-Growing Companies list for 2024, they've developed their proprietary TAP (Team and Process) methodology over 14 years of market experience.

In early 2025, they joined forces with Apadmi, expanding their European reach and capabilities.

Their open-source libraries are utilized by major platforms including Facebook, WhatsApp, and TikTok, while their client portfolio spans from startups to global brands like Giphy, demonstrating their ability to handle complex, high-scale mobile applications with seamless project management and technical excellence.

4. SolveIt

• Founded: 2016

• Location: Warsaw, Poland

• Website: solveit.dev

• Specializes In: Mobile app development, Healthcare applications, Energy/FinTech solutions

• Services: Mobile app development (iOS/Android), cross-platform app development, web development, custom software development, MVP development, UI/UX design, discovery phase, dedicated development teams, QA testing, application support

• Starting Price: $25,000+

• Notable Work: OIIO energy saving mobile app for Reganosa (helped users save 26% on electricity bills), Telemedical web app with video consultations for medical clinic network

Warsaw-based SolveIt has established itself as a trusted EU-based full-service development company with a 100% client satisfaction rate and 5-star Clutch rating.

Their 50+ in-house team serves clients across ecommerce, healthcare, fintech, travel, and booking industries, working with both startups and Fortune 500 companies.

They offer structured development packages ranging from simple MVPs to complex applications, with customizable solutions for each client.

Their expertise spans native mobile development, AI integration, and telemedicine platforms, demonstrating particular strength in healthcare and energy sectors where they've delivered measurable user outcomes and cost savings.

5. Empat

• Founded: 2013

• Location: Kyiv, Ukraine

• Website: empat.tech

• Specializes In: Mobile app development, Social/communication apps, Healthcare applications

• Services: Mobile app development (iOS/Android), web development, custom software development, UI/UX design, AI development, e-commerce development, application testing, AR/VR development, DevOps, staff augmentation

• Starting Price: $25,000+

• Notable Work: Obimy social communication app (10M+ users, topped US App Store ahead of Tinder and Netflix), HealUA medical platform connecting thousands of doctors worldwide

This prominent Ukrainian startup studio with 140+ professionals has delivered over 300 projects across 17 global markets.

The company gained international recognition when their flagship product Obimy became the #1 app in the US App Store, surpassing major platforms like Tinder and Netflix.

Recognized by Clutch as the 14th fastest-growing company globally (with 158.8% growth over two years), Empat has demonstrated expertise across fintech, healthcare, edtech, and social networking sectors.

Their commitment extends beyond business success through active participation in social initiatives and volunteer projects supporting Ukraine, including raising over UAH 8.5 million for military aid through their RevengeFor platform.

6. WOLFPACK DIGITAL

• Founded: 2015

• Location: Cluj-Napoca, Romania

• Website: wolfpack-digital.com

• Specializes In: Mobile app development, FinTech applications, Healthcare & beauty tech

• Services: Mobile app development (iOS/Android), web development, UX/UI design, AI integration, business strategy, product discovery workshops, QA & testing, application maintenance, blockchain development

• Starting Price: $25,000+

• Notable Work: No7 Pro Derm Scan for Boots (skin analysis app used in 400+ stores, tested by 100,000+ users with 4.9-star rating), Extra Karte mobile banking app for Novum Bank

Cluj-Napoca's WOLFPACK DIGITAL has grown into an award-winning agency with 60+ professionals delivering 200+ digital products across diverse industries.

Winner of the European Technology Awards for App Development and the 2024 Webby Award for Responsible AI, they've built platforms now serving over 5 million users monthly.

Their expertise spans fintech, healthcare, beauty, and IoT sectors, with notable success in creating sophisticated mobile solutions that integrate cutting-edge technologies like AI and IoT.

The company operates with agile methodologies and maintains a strong focus on scalable architecture, having been featured in TechCrunch and recognized by Fast Company for their design excellence.

7. LeanCode

• Founded: 2016

• Location: Warsaw, Poland

• Website: leancode.co

• Specializes In: Flutter mobile app development, Banking/FinTech applications, Cross-platform development

• Services: Mobile app development, cross-platform app development, legacy app modernization, web development, .NET development, UI/UX design, product strategy, QA & testing, IT consulting

• Starting Price: $25,000+

• Notable Work: CA24 Mobile banking app for Credit Agricole Bank (one of the largest Flutter apps worldwide with 30+ developers), MMG Talent casting platform for Dubai modeling agency

Warsaw's LeanCode has grown from 6 professionals to over 70 experts specializing in Flutter development.

Recognized as one of the fastest-growing companies in Central Europe by Deloitte's Technology Fast 50 and honored with the Forbes Diamond Award 2024, they've established themselves as Poland's leading Flutter consultancy firm.

The company actively contributes to the Flutter community by organizing Flutter Europe (the world's largest Flutter conference) and Flutter Warsaw meetups, while developing open-source frameworks like Patrol for UI testing.

Their expertise spans enterprise-level banking applications to innovative casting platforms, serving clients across Europe, the US, and Australia with solutions that combine deep technical knowledge with strong business acumen.

8. Netguru

• Founded: 2008

• Location: Poznań, Poland

• Website: netguru.com

• Specializes In: Mobile app development, AI adoption and digital acceleration, product design and UX/UI

• Services: Mobile development (iOS, Android, Flutter, React Native, Kotlin Multiplatform), web development (React.js, Angular, Vue.js, Node.js, Ruby on Rails, Python), product design and UX/UI design, AI and machine learning solutions, generative AI, low-code development (Mendix, Webflow), quality assurance, project management, cybersecurity, cloud technology solutions

• Starting Price: $25,000+

• Notable Work: UBS mobile banking app redesign (improved mobile-first experience and login flows), Otodom marketplace optimization (achieved 21% conversion increase and 116% growth in subscription rates)

Netguru stands as a certified B Corporation and digital acceleration powerhouse that excels in transforming business ideas into scalable mobile and web solutions.

With over 400 specialists and 15+ years of experience, they've earned the trust of global brands like UBS, IKEA, and Merck by delivering mobile-first approaches that significantly improve user engagement and business metrics.

Their unique value proposition lies in seamlessly extending client teams with mission-driven experts who understand both cutting-edge technology and business impact, making them ideal for enterprises and scale-ups seeking rapid digital transformation with measurable results.

9. Tapptitude

• Founded: 2013

• Location: Cluj-Napoca, Romania

• Website: tapptitude.com

• Specializes In: Native mobile app development (iOS/Android), product strategy and MVP development, habit-forming app design

• Services: iOS development (Swift, SwiftUI, UIKit), Android development (Kotlin, Java), cross-platform development, product strategy, UI/UX design, product discovery workshops, MVP development, technical consultancy, solution design, code audit, quality assurance, IoT integrations

• Starting Price: $5,000+

• Notable Work: Glorify (Christian worship app with $1M+ funding serving millions of users weekly), Imobiliare.ro (Romania's largest real estate platform with 1M monthly visitors and 4.6-star rating)

Tapptitude operates as a product partner rather than a traditional development agency, focusing on long-term relationships with committed founders during the critical first 1000 days of product development.

With over 120 products built and a 90+ person product squad, they've established themselves as one of Romania's strongest app development companies through their custom mobile development school and senior-level expertise (40% of team members).

Their unique value proposition lies in combining technical excellence with habit-creation psychology and product strategy, making them ideal for startups and scale-ups seeking not just development services but genuine product partnership to achieve product-market fit and sustainable growth.

10. Uptech

• Founded: 2016

• Location: Ukraine

• Website: uptech.team

• Specializes In: Mobile app development for startups and enterprises, AI-powered solutions, fintech applications

• Services: iOS development (Swift, SwiftUI), Android development, web development (React.js, Nest.js), AI and machine learning services, generative AI solutions, cloud and SaaS development, product design, UX/UI design, product discovery, quality assurance, maintenance and support

• Starting Price: $25,000+

• Notable Work: GOAT (global sneaker marketplace serving 30+ million users across 170 countries), Feeture (music collaboration platform with 5-star App Store rating and media coverage in Billboard and Yahoo!)

Uptech distinguishes itself as a collaborative software development partner that goes beyond traditional outsourcing by embedding deeply with client teams to co-create market-defining products.

With 200+ delivered projects across 12 countries and an impressive 4.9 Clutch rating, they've proven their ability to handle complex technical challenges for both Fortune 500 companies and innovative startups.

Their product-first mindset combined with expertise in cutting-edge technologies like AI and machine learning makes them ideal for ambitious companies seeking to build category-defining digital products that resonate with users and drive measurable business success.

11. itCraft

• Founded: 2010

• Location: Poland

• Website: itcraftapps.com

• Specializes In: Mobile app development, B2B solutions, EdTech applications

• Services: iOS development, Android development, web development, generative AI services, UX/UI design, product discovery, visual identity design, quality assurance, Flutter development, backend development, DevOps

• Starting Price: $25,000+

• Notable Work: BeeSpeaker (language learning app with 4.7+ rating and 1.3M monthly user interactions), Makro (B2B loyalty app serving 105K monthly users, winner of 2020 best B2B mobile app award)

itCraft stands out as a security-focused development partner with ISO9001 and ISO27001 certifications, demonstrating their commitment to quality and data protection standards that enterprise clients demand.

With 100+ experts and 350+ delivered projects over 12 years, they've earned a perfect 5.0-star rating on Clutch by combining technical excellence with transparent project management and deep user research.

Their strength lies in transforming complex business ideas into award-winning mobile applications that drive real engagement and measurable results, making them ideal for companies seeking a reliable long-term technology partner who understands both the technical challenges and business impact of digital transformation.

12. SoftwareHut

• Founded: 2015

• Location: Poland

• Website: softwarehut.com

• Specializes In: Crisis management applications, supply chain solutions, startup development

• Services: Mobile app development (iOS, Android), web development, custom software development, project management, requirement gathering, design, development support, outsourcing services

• Starting Price: $5,000

• Notable Work: Regional Warning System app (nationwide crisis management platform for public safety alerts), Supply chain management solution (mobile apps for startup managing logistics operations)

SoftwareHut positions itself as a problem-solving technology partner that prioritizes transparent communication and measurable results over feature complexity.

Operating 100% remotely with certified Scrum Masters, they've built expertise in developing mission-critical applications that serve both government authorities and private sector startups.

Their strength lies in transforming complex requirements into reliable, user-friendly solutions while maintaining close collaboration with clients throughout the development process, making them well-suited for organizations seeking a dependable outsourcing partner who understands both technical challenges and business objectives.