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Application Development

Custom web and mobile application development. We build booking platforms, SaaS products and internal tools that handle real users, data and payments.

4.9 on Clutch, 6 reviews4 international awards since 2022Building from Budapest since 2021
Application Development

What we build

We do application development for web and mobile apps that handle something important: bookings, payments, scheduling, customer data. That means booking platforms, SaaS products, and internal tools that replace the spreadsheet three people are afraid to touch. We've built with Next.js, React, Laravel and React Native since 2021, and taken more than ten MVPs from idea to launch. For a first version, what an MVP costs in Europe compares our €4,000 to €25,000 range with market rates.

These apps record, calculate or charge for something, so mistakes cost money.

Get the data model right

The data model matters more than the framework.

Most apps that become painful to change got that way because someone decided the shape of the data in the first week, in a hurry, and everything since was built around it. We spend real time on it up front, with you, in plain language. You won't see it on screen, but you'll feel it for years.

How we work

A short discovery, in writing. What the app has to do, who uses it, what it connects to, and what the first usable version is. You get a document with the scope, stages and cost. It's a fixed price, and the document is yours whether or not we build the app. For a new product, this is the MVP Scoping Sprint: €900, about two weeks, credited against the build.

Stages that each end in something real. You use it, we adjust, then we carry on. Feedback on software you've clicked through is worth more than feedback on a spec.

Tests where they count. We test the paths that cost you money if they break: sign-up, payment, and the two or three actions your product exists for. A pipeline runs those tests on every change and blocks the deploy if they fail.

Already have something half built?

More and more people come to us with an app built in Lovable, v0, Bolt or Cursor that works in a demo but can't safely take real customers. That's a specific job, and it has its own page: prototype to production.

When we'll suggest something else

Sometimes you don't need custom software. If an off-the-shelf product covers eighty per cent of what you need, we'll tell you, even though setting it up is a much smaller job for us. And if rewriting what you have is the fastest route to something you can build on, we'll say so, with the reasoning and the cost, before you spend anything fixing the wrong foundation.

How it works

Built in stages you can stop
Apps go wrong by growing. We split the work into stages, and each one ends with something you can use. At every stage you decide whether to carry on, change direction or stop. If you'd have to wait six months to see anything work, that's a gamble.
Security from day one
We check permissions on the server, write and test the database rules, and keep secrets out of anything the browser can read. This is cheap while we build the app and expensive once it has real users, so we do it now.
Built for real traffic
We write queries that work at ten thousand rows, add indexes where they're needed, paginate every list and move slow work out of the request. Then we measure it, so the numbers we give you come from a test.
Migrations, backups and staging
Your database schema goes under version control. We set up backups and restore from one at least once with you watching. Staging is kept separate from production. None of this looks impressive in a demo, and all of it is what makes a product dependable.
Ready to hand over
We document the app so your own developers can take it over, or we run it for you each month. We'll tell you which we think fits. Either way, you won't depend on us because nobody wrote anything down.

What's included

Included

  • A written discovery with scope, stages and a fixed price
  • A data model agreed with you before we build
  • Server-side permissions, tested database rules, secrets kept out of the browser
  • Version-controlled migrations, and a backup restored once while you watch
  • Tests on the paths that cost money if they break, plus a pipeline
  • Documentation good enough for another team to take over

Not included

  • Ongoing hosting and third-party service costs
  • Content, copy and images
  • App store fees and review (we prepare the submission)
  • New features found after the scope is agreed (we quote them first)

What we build with

  • Next.js
  • React
  • React Native
  • Laravel
  • Node.js
  • PostgreSQL
  • TypeScript
  • Docker

FAQ

Questions we often get.

All our prices are on the pricing page.

What does an application cost?
Most of ours cost between €5,500 and €17,500, at €25 to €45 an hour with a €1,000 minimum. The range is wide because an internal tool for eight people and a customer-facing platform are very different projects. Discovery turns it into one number, and that number is fixed before we start building.
How do you scope an application?
In stages that each end with something you can use. At every stage you decide whether to carry on, change direction or stop. You never have to wait six months to see it working.
What decides whether it works long term?
The data model, more than the framework. Most apps that become painful to change got that way because someone set the shape of the data in week one in a hurry. We spend real time on it up front, with you, in plain language.
Can our own developers take it over?
Yes. We document it for a team that has never seen it, and clients have taken builds in house after launch. Or we can run it for you each month. We'll tell you which we think fits.
Do you build mobile apps too?
Yes. We use React Native when one codebase can serve both iPhone and Android, which is true for most business apps. When it can't, we'll tell you.
What about security?
We check permissions on the server, write and test the database rules, and keep secrets out of anything the browser can read. This is cheap while we build the app and expensive once it has real users.
We already have something half built. Can you finish it?
Often, yes. If it came out of Lovable, v0, Bolt or Cursor, that's a specific job, and it has its own page: prototype to production.

Tell us about your project.

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