Martin Mokaň, freelance mobile and web app developer

I’ll build your app. All of it. Mobile or web. I design it, build it, launch it and look after it afterwards. No agency overhead.

What I’ve built

An AI studio, mobile apps, SaaS for businesses and platforms for clients. I designed and built every one of these myself.

• Laterna magica, AI studio (SaaS). My own AI studio for images, video, music and 3D, with a Marketing Studio that turns one link into ads for every network. (React, TypeScript, Node.js, Firebase, Stripe, MCP)
• Timesheet-Invoice, SaaS. A SaaS platform for construction companies that connects time tracking with automated invoicing. Built for a client, multilingual. (React, TypeScript, tRPC, Firestore, Drizzle, Stripe)
• Plus WorldBike, mobile app. A mobile app for cyclists, a digital garage of bikes, a service log, distance leaderboards, and maps that work offline. (Flutter, Dart, Firebase, sqflite)
• Kronocast, streaming platform. A complete live streaming platform built for a client, live broadcasting, monetization through subscriptions and payments, plus an admin and compliance layer. (React, TypeScript, Supabase, FastAPI, Stripe, WebRTC)
• TYVAQ, mobile app. A mobile app for managing vehicles, service history, maintenance reminders, and costs in one place, with payments and AI assistance. (Flutter, Firebase, Stripe, RevenueCat, Claude)
• PawTalk, mobile app. Record a short video of your dog, PawTalk extracts frames, sends them to Claude AI, and returns the primary emotion, body-language observations, and recommendations. (React Native, Expo, Firebase, Cloud Functions, Claude)
• Mokan Monitor, desktop app. A Rust app and a small agent on the server that show every 5 seconds how my home server is doing. (Rust, egui, Node.js, Server-Sent Events, Debian)
• ParentsHub, web app (PWA). A PWA for divorced parents, shared calendar, expenses, and messaging, where AI filters and softens conflict-heavy messages before they are sent. (Next.js, TypeScript, Supabase, OpenAI, Tailwind)
• HDmobil, online store. An e-shop built for a client on the Slovak market, a modern product catalog, cart, and a simple, fast checkout. (React, Supabase, Tailwind, Stripe)
• Záhradník+, mobile app. An app for gardeners that works locally (local-first), a watering schedule, plant-growth tracking, and care throughout the whole season. (React Native, Expo, TypeScript, Local-first)
• Opus, mobile app. A client mobile app for insurance and investment products, secure login, document management, a verification flow, and a product overview. (React Native, Expo, TypeScript, Zustand, Secure Store)
• OrganizeMe, mobile app. An app launcher and organizer for Android with a focus mode that blocks distracting apps for a while. (React Native, Expo, TypeScript, Kotlin)
• Grabbit, web app (PWA). An installable PWA that downloads videos and MP3s from YouTube, Instagram, TikTok, Facebook, X, and hundreds of other platforms. Runs locally via Node.js. (Node.js, Express, yt-dlp, FFmpeg, PWA)

What I’ll build for you

Indicative prices, so you know what to expect. You get an exact quote for free within 24 hours.

Mobile app, from €3,000

One app for iOS and Android, written in Flutter or React Native. Publishing to the App Store and Google Play included. Timeline: first version in 4 to 8 weeks.

Included:

• Screen design
• Accounts and sign-in
• Notifications
• Payments and subscriptions
• Store publishing

Web app and SaaS, from €2,500

A system in the browser for your people or your customers. Sign-in, roles, payments and admin. From a first version to a product you sell on. Timeline: first version in 4 to 8 weeks.

Included:

• Users and roles
• Stripe payments
• Admin
• Multiple languages
• Server deployment

Online store, from €1,200

A store built for you, not a template. A fast catalogue, a simple cart and product management you can handle yourself. Timeline: 2 to 4 weeks.

Included:

• Catalogue and filters
• Cart and orders
• Payment gateway
• Product management
• SEO

Website, from €400

A fast company site or landing page, designed for you rather than picked from a template catalogue. Timeline: 1 to 2 weeks.

Included:

• Custom design
• Mobile version
• SEO
• Contact form
• Deployment

AI in your product, from €600

Claude or OpenAI where they genuinely help: reading photos and video, an assistant over your data, editing text. Timeline: depends on scope.

Included:

• Prompt design
• Server-side integration
• Output testing

How it works

From the first message you know what is happening, what it will cost and when it will be done.

1. You write to me
   A few sentences about what you need is enough. Within 24 hours I reply with questions, then with a no-obligation quote.
2. I design
   I prepare the screens and the exact scope. Before any code is written you know what you will get and for how much.
3. I build
   I work in parts and keep sending you versions to try. Feedback goes in right away, not at the very end.
4. I launch and look after it
   I deploy to the server and to the App Store and Google Play. After launch I fix, extend and maintain.

Who’ll be building it

I’m Martin Mokaň, a freelance developer from Slovakia. I design, build and launch apps for businesses and for my own products.

There are no salespeople or project managers. You talk directly to me, the person writing your code, and the result is my responsibility. Slovak and English.

What I work with

• Mobile: Flutter, React Native, Expo
• Web: React, Next.js, TypeScript, Tailwind
• Desktop: Rust, egui
• Backend: Node.js, Firebase, Supabase, PostgreSQL, FastAPI
• Payments and AI: Stripe, RevenueCat, Claude, OpenAI
• Operations: App Store, Google Play, VPS, own server, Cloudflare

Free tools

Alongside client work I build small web tools for people in Slovakia and Czechia. Each one has its own design and works right in the browser.

• PDF editor: Edit PDFs right in the browser, nothing gets uploaded.
• Salary calculator 2026: Net pay, contributions and employer cost under the 2026 rules.
• Slovakia in data: Live regional statistics on an interactive map.
• Slovak companies: Seat, directors and owners of any company by name or ID.
• Document generator: Contracts and powers of attorney, filled in right on the page.
• Long weekends: Turn a few days of leave into the longest possible break.
• When do I retire: Your exact retirement date in Slovakia or Czechia.
• Trip fuel cost: Trip cost with current Slovak fuel prices.
• Electricity cost: What your appliances cost per month and per year.
• Working days and holidays: Working days between dates and the monthly work-time fund.
• QR code generator: QR codes with your own colours and a centre logo.

Questions people ask

How much will it cost?

A website from €400, an online store from €1,200, a web app from €2,500, a mobile app from €3,000 and an AI integration from €600. I give you an exact price after a short conversation. The quote is free and without obligation.

Why not an agency?

An agency also bills you for project managers, salespeople and an office. With me you pay only for work on your project and you deal directly with the person doing it.

How long does it take?

A website usually 1 to 2 weeks, an online store 2 to 4 weeks, the first version of an app 4 to 8 weeks. You get an exact schedule together with the quote.

What happens after launch?

I don’t hand it over and disappear. Fixes, changes and new features are agreed as you need them.

How do we start?

Tell me what you need through the form below or at mokansro@gmail.com. I reply within 24 hours.

Tell me what you need.

A few sentences are enough. Within 24 hours I reply with questions and a no-obligation quote.

Email: mokansro@gmail.com
Phone: +421 902 554 927
GitHub: github.com/smokysko
LinkedIn: linkedin.com/in/martinmokan

I reply within 24 hours, in Slovak or English.