I build web and mobile apps that solve real problems with simple, practical tools.
Write to me →An old database, awkward software, or too much manual work? Let's find a simpler, more up-to-date way to handle it.
Internal systems, client portals and admin panels that bring scattered information together and make everyday work easier. First, we work out what you actually need so we only build what is useful.
I build apps for Android and iOS, for example when a team needs to work on the move or without a connection. First, we work out whether you need a native app or whether an installable web app can solve the problem more simply.
An old system can still be valuable even when it has become hard to use. I can tidy it up, improve performance and extend it — whether it runs on spreadsheets, an ageing database or older business software.
Built an app with AI tools or through vibe coding? I can review the code, find bugs and risky areas, then help fix it, make it more reliable and prepare it for real-world use.
Less repetitive admin and copying by hand: I can connect the tools you already use or automate recurring tasks.
AI is useful when it solves a real problem in your process. I can help identify the right use and add it to a new or existing application.
Fast, easy-to-maintain company websites and landing pages, with domain and email setup. The goal is a page that loads quickly and clearly explains what you do.
Attendance and work-time tracking for field teams
The phone automatically records when someone arrives at or leaves a site. Attendance sheets and work-time reports are generated from those records.
Live at a Hungarian engineering firm: 148 sites, 19 phones, since August 2026.
Native Android app, web admin panel and a Node.js backend with PostgreSQL.
Native Android app
kliptrack.com ↗ · live demo on the site
Client portal, website and office workspace for accounting firms
Client requests and documents that used to arrive by message, email and phone are organised by client and task. Each morning, the accountant sees what needs attention in one list.
An online system for Hungarian art galleries
A single system for an artwork catalogue, high-resolution images, exhibition pages and private catalogues. Each artwork has exact dimensions, and the AR feature shows how it would look on your wall at full size. The system also handles Hungarian pricing rules and resale-royalty calculations.
Web app and AR
claircontour.com ↗ · in progress
A home organiser for the whole family
Keep calendars, chores, shopping, bills and mood in one place. Ask “What should I do?” and get one task suited to the time and energy you have.
An installable web app that works on both phone and desktop.
Cataloguing collections with a camera
Take one photo of a shelf to identify several books or board games. The app checks barcodes first, then uses image recognition for items it cannot match. Review each result on the photo and accept or reject it.
Native Android app
collection-checker.hu · coming soon
Personal sites, each built around a different idea.
A personal site inspired by a metro map, an AI governance landing page with a kintsugi motif, a noir-style evening paper and a few smaller design experiments.
For larger projects, I agree a fixed price with clear milestones. The proposal sets out what I will build, when it will be ready and what it will cost. Payments follow the same schedule.
Good software takes unnecessary work off your team's plate. I help simplify everyday processes, connect the tools you already use and build systems that fit the way your business works.
You work with me directly, so details do not get lost along the way. We agree what you need, what belongs in the first version and how the system can grow over time.
These examples from my own work include Android and web apps. I have also built cross-platform and iOS apps for clients, using Flutter, Xamarin and Kotlin.
First I get to know the current process. Building an application is not automatically the right answer. If something simpler would do, I will say so.
We decide what the system has to do, what belongs in the first version, and what can wait. On that basis you get a written quote covering scope, deadline and price.
You can see where the project stands throughout. How the finished system looks is not a surprise revealed at the end.
After handover I can still fix, extend and run the system.
Thinking about a web or mobile app, modernising an older system, or fixing an AI-built project? Send me a few details and we can work out the best next step.
hello@vinczemarton.devThe conversation is free.
I am happy to meet in person in Budapest and the towns north of it. For other locations, a video call works well.
Referral programme:I have a referral programme with the terms agreed in advance. If your introduction leads to a project, you receive the amount set out in the agreement—no renegotiating it afterwards.How the referral programme works ↗
