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Product building

From your idea
to a working product

Idea in. Product out. / Bejön az ötlet. Kimegy a kész darab.

Most people get stuck in the same place: the idea is good, but there is nobody to make it. Hiring a developer is expensive and risky, running an agency is a job in itself. I take that stretch off your hands: I design it, build it and launch it — together with the operation that keeps it running afterwards.

Talk through your idea What happens exactly?
What this is

You're not buying development. You're buying a launched product.

There is a term for this role: a product studio — one that doesn't just build the thing but gets it running, closer to a venture builder. Put simply: I build it and I start it. Agencies give you one half (the code), consultants the other (the process). Here it's one delivery.

Product

The working thing: what the customer opens, fills in, buys. Thought through, built, tested — not a presentation about it.

Operation

Who does it on Monday morning, what the process is, what we measure, when to step in. Without this, the finest product stalls in two months.

Handover

The goal is that you don't depend on me. I leave behind a written-down system and a trained hand, not a permanent maintenance contract.

This is for you if…

  • you have a concrete idea and you know who it's for;
  • you know your trade, and building it is the missing part;
  • you run a business and want to turn a process into a product;
  • you want to see something in weeks, not quarters.

This isn't for you if…

  • you have a finished spec and want cheap hands — you need a developer;
  • you want hourly, open-ended work;
  • decisions are made by committee and every loop takes three weeks;
  • you're asking for something with no business logic I can see. I'll say so.
How the work goes

Four stages, each ending in something you can hold

No “let's see how it goes”. Every stage has an output you can look at and take with you — even if you do the next stage without me.

1 Clarify · free

We work out what we're building

One conversation about what you want, who it's for, and where the money comes from. My questions will be uncomfortable: who pays for this, why now, what happens if it never gets built. Cheaper to ask today than in six months.

What you get: one page describing the product, the customer and the path to revenue. Yours, even if we stop here.

2 Offer · a few days

Fixed scope, fixed price, fixed date

I write down what gets built in the first version and — more importantly — what doesn't. The first version is always the smallest thing that can already be sold. Price and date attach to that, not to an hourly rate.

What you get: scope, price, schedule and the list of what's left out. No stray extra invoices.

3 Build · two-week loops

Every two weeks you see something that runs

I don't send status reports, I send a working part you can try. The other half is built alongside it: the process, the owners and the metrics that will show whether the thing works. If something turns out to be the wrong direction, you hear it early.

What you get: a testable version every two weeks, an open task list, and every account in your name.

4 Handover · the keys are yours

I leave it so it runs without me

Launch, training, documented processes. We agree what the first three months require, and what signal means it's time to change something. I can stay on with monthly care — but that's a choice, not a condition.

What you get: a live product, documented operation, a trained team, and an honest list of what could come next.

Pricing

The scope sets the price, not the hours

The first conversation is free and commits you to nothing. After that I give a fixed-price offer for the scope we agreed: you know upfront what it costs and when it's done. New requirements along the way are separate items — written down in advance, not on the final invoice.

Stage 1

Clarify

Freeone conversation and one page

  • an hour on what we build and for whom
  • a one-page summary: product, customer, revenue
  • an honest opinion if it isn't worth doing

The summary is yours even if we stop here.

Stages 2–4 · the main work

First version

Fixed priceset to the scope, in the offer

  • fixed scope, fixed date, fixed sum
  • two-week loops, always with a testable version
  • the operation is included: process, owner, metric
  • launch, training, every account in your name

The figure sits in the offer, after clarification. New requirements are separate items — written down in advance.

after handover · optional

Care

Monthly feeonly if you want it, cancel anytime

  • running and watching over the product
  • a monthly review: what works, what to change
  • smaller improvements within the monthly allowance

I build the system to run without me. This is a choice, not a condition.

Why not hourly? Because hourly punishes you: you'd be paying for my slowness. At a fixed price it's in my interest too that it's done fast and done well.

Proof

Six products I carried end to end

The best reference isn't a wall of logos, it's what I built for myself and still run. A certified valuation process, a calculator for developers, a daily market report that goes out at seven every morning.

VProperty logo VProperty.huvaluation practice Értéktanú logo Értéktanúonline valuation Értéktanú Pro logo Értéktanú Proland price calculator Főtér logo Főtérdaily market report

The full six — including the podcast and the data layer — are on the map on the home page.

Case studies

Three ideas I carried through

All three started the same way: an annoying problem, and nobody to build the answer. Same four stages, same hand.

Főtér logo The morning coffee Főtér foter.eu

The idea

Anyone hunting for property scans several listing sites every morning and sees the same flat four times. The information exists — just in an unusable shape.

What I built

A daily market report. You describe what you want in plain language; the system gathers from several sources, strips the duplicates, and condenses it onto one page: what's new, what got cheaper, what disappeared.

What came of it

A product that goes out by itself at seven — no daily manual work in it. The operation was part of the delivery too: collection, filtering, sending, checking.

“Not a list. A decision.”

Értéktanú logo The seal Értéktanú ertektanu.hu

The idea

Valuation is a black box to the client: you pay first, you see later. My own practice told me where people get stuck — and that most of the process is repeatable.

What I built

A guided online process. It starts with a free instant estimate, Becsli the mascot holds your hand, and it ends with a document certified by a qualified valuer — within 24 hours. With a mobile app alongside.

What came of it

A practice's one-off work became a repeatable product that works while I don't. Same professional substance, in a form that scales.

“Value first, seal second.”

Értéktanú Pro logo The calculator Értéktanú Pro pro.ertektanu.hu

The idea

A developer doesn't ask what the plot is worth. They ask what they can pay for it and still have the project work out. There was no tool for that.

What I built

A calculator that works backwards: from the economics of the planned project to the maximum payable land price. Three scenarios, sensitivity analysis, downloadable report.

What came of it

A second, professional audience from the same data layer — on its own subdomain, with its own identity. Értéktanú serves consumers, Pro reaches the same core from the developer's side.

“Not what it's worth — what you can pay for it.”

All three are mine, which is why I can tell the whole story. Yours could be next — same four stages, your idea.

Frequent questions

What people ask most

Will you take my idea?
No. The idea and everything built from it are yours — we put that in writing from the first minute. We can start with a non-disclosure agreement if you want one.
How long until I see something?
The clarification page takes a few days. The first testable version is typically measured in weeks, not months — because the first version is deliberately small. The real question isn't when everything is finished, but when we find out we're heading the right way.
I'm not technical. Is that a problem?
No, that's the normal case. You don't have to learn to speak real-estate — or technology. We talk in plain language about what the thing needs to do; the how is my job.
What if the idea turns out to be wrong?
I'll tell you, and early. That's what the clarification stage and the two-week loops are for: changing direction after a month is far cheaper than letting go after a year. If it isn't worth building, I'll say that too.
Can I count on you afterwards?
Yes, but you don't have to. After handover I can stay on with monthly care, or you can just call when you need me. I build the system to run without me.
Contact

Tell me what you want built

One paragraph is enough to start: what the idea is, who it's for, and what's blocking you right now. I'll write back, and if it makes sense we sit down for an hour. This part is free.

Email hello@smartsquareproductions.com

This is the shortest route. I reply within a working day.

What to write
  • 1What the idea is — two sentences will do.
  • 2Who it's for, and why they'd pay for it.
  • 3What's blocking you — time, know-how, money, or something else.
Write to me VProperty.hu