Custom apps · iOS, Android and web
Development of custom mobile and web apps
We design and build apps for iOS, Android and the web — from prototype to publishing on the App Store and Google Play. We build backends on Laravel and Symfony, apps in React Native, and we can connect everything to AI and, via MCP, to your systems.
- own apps in the stores
- 4
- projects since 2012
- 600+
- App MVP in
- 2–3 months
- average from 62 Google reviews
- 4,9★
In short
Everything that matters in one place
- What we do
- Mobile apps for iOS and Android, web apps, internal systems, client zones and B2B portals.
- Who it's for
- For companies in Slovakia, the Czech Republic and Austria that want to simplify processes or bring their service to customers' phones.
- Price
- Mobile app from €5,000, app with backend and integrations €10,000–50,000.
- Timeline
- First version (MVP) in 2–3 months, full version in 4–6 months.
- Technologies
- React Native with Expo for iOS and Android, backend on Laravel and Symfony, Vue, AI (OpenAI, Claude) and MCP.
- Publishing
- We handle developer accounts, store assets and approval on both the App Store and Google Play.
- Proof
- We run 4 of our own apps on the App Store and Google Play — MR. Digital, Proon. PMS, Logbook and Mobile Terminal.
When you need an app
When spreadsheets and emails aren't enough
A custom app pays off when manual work or scattered data is slowing your company down, or when customers want your service right on their phones. Off-the-shelf software bends you to its processes — a custom app adapts to you.
Discuss my ideaYour company runs on Excel and email
Orders, inventory or bookings are retyped by hand. An app brings them together in one system with permissions and history.
Clients want everything on their phones
Loyalty card, orders, job status or bookings — in your own app with push notifications and your brand.
People work outside the office
GPS logbook, scanning goods in the warehouse, guest check-in or field reports — straight from the phone.
Your systems don't talk to each other
CRM, invoicing, e-shop and inventory live separately. We connect them via API and MCP so data flows automatically.
What we develop
From an app to an entire system
A mobile app is often just the tip of the iceberg. We also build the backend, admin, API and integrations it runs on.
from €5,000
iOS and Android mobile apps
One codebase for both platforms in React Native, with native phone features — push, widgets, camera, GPS.
custom quote
Web apps and internal systems
CRM, booking, ordering and record-keeping systems with roles, permissions, reports and exports.
custom quote
Client zones and B2B portals
Orders with individual pricing, history, documents and sign-in with a Microsoft or Google account.
custom quote
An app for your existing system
Have a CRM, e-shop or PMS? We'll build a mobile app for it for your staff or customers.
custom quote
API and integrations
REST API with documentation, connections to invoicing, payment gateways, channel managers or accounting.
custom quote
AI and MCP in your app
An AI assistant over your data, document recognition and an MCP server that lets you control the app from Claude or ChatGPT.
Our own products
Apps we run ourselves
We don't just build apps for clients. We have our own products on the App Store and Google Play — so we know what approvals, updates and user support involve.
App Store · Google Play
MR. Digital — Client Zone
Loyalty card in Apple and Google Wallet, points, rewards, reports including by voice, and an iOS widget.
Case study →App Store
Proon. PMS
Your whole property in your phone — bookings, rates, housekeeping, check-in and a widget of today's arrivals.
Case study →App Store
Proon. Logbook
GPS route tracking, even in the background, and automatic logging of trips into the company system.
Case study →Google Play
Proon. Mobile Terminal
Your phone as a warehouse terminal — receive and dispatch goods by scanning a QR code.
Case study →Coming soon
Proon. Business
CRM and ERP in your pocket — tasks, projects, calendar and customers with a “Today” widget.
Case study →Your app could be next
Tell us what it should do. Within 48 hours you'll have a proposed solution and a price estimate.
What we can do
Features that are already live
None of this is theory — we use every one of these features in live apps in the stores.
I want an app with these featuresPush notifications
Alerts about new orders, bookings or articles — also targeted based on user consent.
iOS widgets
Today's bookings, tasks or loyalty card right on the phone's home screen.
Apple and Google Wallet
Loyalty cards and coupons your customers always have with them.
GPS and background location
Route and trip tracking without the app having to be open.
QR code scanning
A phone instead of an expensive scanner — receiving, dispatch and stocktaking.
Voice input
Slovak dictation right on the phone — tasks and reports without typing.
Secure sign-in
OAuth 2.0, one-time codes by email, two-factor authentication and an audit log.
Payments and invoicing
Stripe, GoPay and automatic invoices via SuperFaktúra or iDoklad.
Technologies
Technologically limitless
We build the backend and admin on the Laravel and Symfony frameworks, and mobile apps in React Native with Expo — one codebase for iOS and Android with access to native features. We connect the app to OpenAI and Claude AI models and, through an MCP server, make it available to AI assistants too. We aren't limited by an off-the-shelf platform — we build whatever the process needs.
Laravel
Backend, API and admin
Symfony
Large, complex systems
React Native
iOS and Android from one codebase
Vue · Livewire
Web interfaces and PWAs
MCP
An app you can control through AI
AI API
OpenAI and Claude in your app
Custom software
Systems that run in production
CRM & ERP
Proon. Business
Projects, sales, inventory, marketing, an AI assistant and an MCP server in one system.
PMS & channel manager
Proon PMS
Bookings from Booking.com and Airbnb, rates, online check-in and smart locks.
Back office
Heart of Slovakia
Orders, rooms and automatic PIN codes for TTLock smart locks.
B2B zone
TAXON
Microsoft sign-in, customer discounts and price import from Excel.
Internal system
SÚSCCH
Automatic publishing of invoices and orders, and content management via AI.
Registry
Slovak Biathlon Union
Clubs, athletes and referees with application approvals and exports.
Have an idea?
From idea to app in the store
The first consultation is free. We'll go through your idea, propose the scope of the first version (MVP), and within 48 hours you'll have a price and timeline estimate.
Pricing
How much does app development cost
Prices are indicative. We'll prepare an exact estimate after analyzing your requirements and building a prototype — so you know what you're paying for.
Mobile app
from €5,000
MVP in 2–3 months
- ✓iOS and Android from one codebase
- ✓Figma prototype before development
- ✓Publishing on the App Store and Google Play
- ✓Push notifications and sign-in
App with a system
€10k–50k
full version in 4–6 months
- ✓Custom backend and admin
- ✓Integrations — CRM, payments, invoicing
- ✓Widgets, Wallet, GPS, QR as needed
- ✓AI features and MCP server
Web app
custom quote
depending on scope
- ✓Internal systems and client zones
- ✓Roles, permissions, 2FA and audit log
- ✓Reports, exports, API
- ✓Mobile app as an extension
What does the price depend on?
On the number of screens and user roles, integrations with other systems, offline data handling, and whether you also need a backend and admin. You can start with a smaller first version (MVP) and expand the app based on how people use it.
Comparison
Native, cross-platform or PWA?
| Cross-platform (React Native) | Native (Swift, Kotlin) | Web app (PWA) | |
|---|---|---|---|
| Platforms | iOS and Android from one codebase | Separate development for each | Browser on any device |
| Cost | Lower — one team, one codebase | Highest | Lowest |
| Phone features | Push, GPS, camera, widgets, Wallet | Absolutely everything | Limited |
| App Store and Google Play | Yes | Yes | No, installed from the web |
| When it fits | Most business and customer apps | Extreme performance or hardware demands | Internal tools that don't need a store |
If a PWA or a website update is enough for you, we'll tell you straight away.
Process
How app development works
We develop in stages with regular demos. You can try the work-in-progress app on your phone before launch.
01
Discovery
We understand the problem, the users and the processes. We define the scope of the first version (MVP).
02
Prototype
You test a clickable Figma prototype with real people before any coding starts.
03
Development in sprints
Backend, app and integrations in stages, with regular demos and adjustments.
04
Testing
Testing on real devices, performance and security, test builds for your team.
05
Publishing
Developer accounts, screenshots, descriptions and approval on the App Store and Google Play.
06
Growth and support
Updates for new iOS and Android versions, monitoring and new features.
Related services
An app is part of the bigger picture
FAQ
Frequently asked questions
Didn't find your answer? Email info@mrdigital.sk or call +421 949 612 022.
Ask usHow much does mobile app development cost?
Mobile app development starts from €5,000 for simpler projects. Complex apps with a backend, integrations and advanced features range from €10,000 to €50,000. We'll prepare an exact estimate after analyzing your requirements and building a prototype.
How long does app development take?
We usually deliver the first version (MVP) in 2–3 months and the full version with advanced features in 4–6 months. The timeline depends on the scope and integrations, which we pin down in the initial analysis.
Native or cross-platform app?
We build most apps cross-platform in React Native — one codebase covers iOS and Android, and the app has access to phone features like push, GPS, camera and widgets. We recommend native development (Swift, Kotlin) only for extreme performance demands or specific hardware.
What technologies do you build apps on?
Backend and admin on the Laravel and Symfony frameworks, web interfaces in Vue and Livewire, mobile apps in React Native with Expo. We connect apps to OpenAI and Claude AI models and, through an MCP server, to AI assistants as well.
Can you create a prototype before development?
Yes, we always start with an analysis and a clickable Figma prototype. You test the prototype with real users before any coding — we validate the concept, reduce risk and save costs.
Do you handle publishing on the App Store and Google Play?
Yes. We'll help set up developer accounts and prepare screenshots, descriptions and everything required for approval on both the Apple App Store and Google Play. We run our own apps in the stores, so we know the process well.
Can you connect the app to our existing system?
Yes. If your system has an API, we connect the app to it directly. If it doesn't, we build a connecting layer. We integrate CRMs, e-shops, invoicing systems (SuperFaktúra, iDoklad), payment gateways (Stripe, GoPay) and channel managers for accommodation.
Can artificial intelligence be added to the app?
Yes. An AI assistant over your data, document and photo recognition, voice input or automatic email processing. Through an MCP server, we also make the app available to AI assistants like Claude or ChatGPT. More about AI agents.
When is a web app (PWA) enough?
For internal tools that don't need the App Store or advanced phone features. A PWA installs straight from the browser, costs less and works on any device. If it's enough for you, we'll recommend it.
How do you handle security and GDPR?
Encrypted connections, secure sign-in (OAuth 2.0, two-factor authentication), role-based permissions and an audit log of changes. We process personal data only to the extent the app needs.
Do you provide support and maintenance after launch?
Yes. We update apps for new iOS and Android versions, monitor errors, handle support and develop new features based on user feedback.
Do you also work for companies outside Slovakia?
Yes. We develop for companies in Slovakia, the Czech Republic and Austria. We have offices in Banská Bystrica, Bratislava, Poprad, Liptovský Mikuláš and Zlín, and most of our collaboration happens online.
Google review · Banská Bystrica
“A marketing agency that has stood by us since our very beginning. They built our website, create all our social media content and run our marketing campaigns.”
Google review · Bratislava
“We've worked together on two projects, which shows how satisfied we were with the first one. A professional and expert approach.”
Google review · Bratislava
“They built us a comprehensive e-learning platform and also helped refine our ideas and the overall project strategy.”
Google review · Banská Bystrica
“From the very start to the completion of the project, they took care of every detail and built us a beautiful website.”
Google review · Banská Bystrica
“After experience with other suppliers, I can only recommend them. Their expertise and approach won me over. Thank you for the collaboration!”