Headless E-commerce and advanced mobile appsHeadless E-commerceand advancedmobile apps
We build integrated sales systems for leaders. We combine the unlimited scalability of Headless E-commerce (MedusaJS) with native-grade cross-platform app experience (React Native). No technological compromises.
Choose your scenario
Hit the ceiling on off-the-shelf platforms (SaaS)? We build custom B2B and B2C systems on MedusaJS. Full control over architecture and integrations.
- No performance or technological limits (MedusaJS)
- Ready for deep integrations (any ERP, PIM, WMS)
- Custom purchase flows and complex B2B/B2C rules
No commitment • Real conversation • Decide only after we talk
Technologies we scale on:
Behind every successful app stands
a well-thought-out strategy.
See how we solve specific business problems together with clients - from the first analysis to a working product that really works and engages users.
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SFD
SFD is more than just a shopping app. It's a comprehensive loyalty app designed to engage and build community.
Platnosci
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Kalendarz zadań
BERG SYSTEM
Berg System is a CRM app in mobile version. It provides access to key data and functions, enabling business management from anywhere.
Klasa 1, 2, 3
29/84 wideo
Matematyka
29/84 wideo
Język polski
29/84 wideo
Przyroda
29/84 wideo
Historia
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Biologia
29/84 wideo
HI!
Hi School is not another boring educational app. It's a digital school guide designed with how you really learn today in mind.
No commitment • Real conversation • Decide only after we talk
They trusted us and see results.
Case study
Results speak
for themselves.
App downloads · 4.9 rating on App Store
SFD app nominated for Mobile Trends Awards 2025 (Commerce). Read more.“We talked to many vendors, but after the conversation with Mikołaj from GMI, I felt completely understood and saw my ideas visualized very quickly. That really captivated me, I felt it simply had to succeed. We have a 4.9 rating on the App Store, which I am very proud of. We continue to work with GMI: we have many ideas for further app development.”
Angelika Sawicka
Co-Founder at Cognic
“The team was an excellent partner in the project - punctual, engaged, and flexible. We felt they truly cared about the final outcome. The app met our expectations, and communication ran smoothly at every stage.”
CognicApp available on
Join our satisfied clients
Schedule a free consultation and get a preliminary quote within 48h. No commitment.
Response within 24h • Preliminary estimate in 48h • No commitment
Get to know us - Podcast by GMI
We share real experience from building digital products: mobile apps, product strategy, technology, and practical project decisions. Watch the episodes and see how we think and work.
One technology, two systems - faster to goal with React Native
We create modern mobile apps in React Native (Expo) that work simultaneously on iOS and Android. Shorter implementation time, lower costs, and easier maintenance - without compromising performance and stability.
Development speed
One repository, two platforms. We create the app once, run it on iOS and Android. Shorter development time = faster ROI.
Performance and battery efficiency
Thanks to React Native and Expo, apps are lightweight and optimized. No compromises in stability.
Integration ready
We seamlessly connect with your systems - API, CRM, ERP, or external solutions. We have experience with integrations even with difficult or non-standard environments.
Stability and growth
Build your app on solid foundations. React Native supported by Meta, Expo accelerating development.
Security
Proven practices and testing of critical paths. Data protection and compliance with requirements.
No commitment • Response within 24h • Preliminary estimate in 48h
Integrate AI and exceed
user expectations
From process optimization to intelligent recommendations - we integrate artificial intelligence in projects to create modern, effective, and future-proof solutions.
No commitment • Response within 24h • Preliminary estimate in 48h
Professional development of
mobile apps for iOS and Android.
We design and implement mobile apps for Android and iOS, combining the latest technological solutions with in-depth market analysis. From concept and strategy to the final product - we take care of every detail so you can focus on growing your business.
Mobile solutions consulting
We'll help you match app features to real user needs.
UX and performance audits
We'll identify what's bothering users and how to fix it.
Conceptual workshops (Product Design)
Develop an effective app concept with us based on real data.
Prototypes & PoC & MVP
Create a test version, validate your idea, and reduce risk.
Mobile apps iOS & Android
We design fast, modern apps tailored to your industry.
External solutions integrations
We connect your app with systems you already know and use.
Server applications (API)
We build secure and scalable technical infrastructure for your app.
Support and maintenance
We take care of development and smooth operation of your app after deployment.
Ready to get started?
Schedule a free consultation and get a preliminary quote within 48h. No commitment.
Response within 24h • Preliminary estimate in 48h • No commitment
From concept to
success in App Store.
Discovery Workshops
We validate your idea before you spend a penny. We define goals, target audience, and MVP so the first version hits the mark.
UX/UI Design
We design an interface users will love. Mockups and prototypes show how the app will work in practice.
Development
You see progress every week, no surprises. We focus on code quality and testing so the product is stable and secure.
Launch & Growth
We monitor results and grow what works. Store launch, data analysis, and continuous improvements.
Have questions?
We have answers.
We've gathered the most frequently asked questions about cooperation, costs, and technology.
Didn't find an answer?
Schedule a free consultation and get a preliminary estimate within 48h. No commitment.
Get a free estimateResponse within 24h • Preliminary estimate in 48h
We price each project individually - budget depends on scale, functionality, and tech. Approximate ranges (examples): MVP loyalty app: 20-30k USD; e-commerce app with integrations: 40-60k USD; full mobile CRM: 50-75k USD. These are indicative only; we recommend a free consultation for a quote tailored to your scope.
Standard implementation time is usually 3-6 months for the first production version (MVP). This time includes Discovery workshops, UX/UI design, programming, and testing. We always present a detailed schedule after analyzing requirements.
Yes, we offer maintenance packages and SLA agreements. We monitor app performance, take care of security updates, and adapt the product to new versions of iOS and Android systems so your app runs smoothly for years.
Of course. After project completion and payment, we transfer full copyright and source code. You own what you pay for, and we don't lock you in (vendor lock-in).
In most cases, we recommend cross-platform technologies like React Native. They allow creating one codebase that works on both iOS and Android, reducing production and maintenance costs by about 30-40% without noticeable performance loss.
Consultations in your city
We'd be happy to meet for an on-site consultation at a convenient business location for you.
No commitment • Response within 24h • Preliminary estimate in 48h
Let's talk
about the project.
Have an app idea or need technological support? Write to us, and we'll prepare a preliminary analysis and estimate within 48h.
80-890 Gdansk, Poland