7-day prototype
See your app before you pay a thing.
After a short call we'll prepare a free mockup of an app for your business. If you like it, we'll build a working prototype in 7 days. And if the prototype doesn't convince you, you get 100% of your money back.
Since 2015 · 20+ years of experience · client references
Where time slips away today
- Orders and arrangements scattered across Excel, email and WhatsApp.
- The same data typed into several places — and still nobody knows which version is current.
- Customers call with questions they should be able to answer themselves.
Offer
Three steps, each one risk-free
- 01
Free mockup
€0
- 2–3 key screens of your app
- Prepared after a 20-minute call
- See what day-to-day work in your company could look like
- No obligation
- 02
7-day prototype
€725 net
- A working app built on your processes, available via a link
- Ready 7 days after the scope is approved
- One round of changes before you decide
Don't like it, or we miss the deadline? 100% back.
- 03
Full project
fixed price
- Scope and price agreed before we start
- Prototype price deducted from the project
- 6 months of support included
The 7-day prototype is for applications worth €3,750 net or more. We prepare a free mockup for smaller projects too. The number of mockups per week is limited. Offer terms
Not part of the prototype: production deployment, integrations with external systems, online payments and data migration. These belong to the full project.
How it works
- 01
Call (20 min)
You tell us how your company works today and what hurts the most.
- 02
Free mockup (within 5 business days)
We show you 2–3 screens of your future app.
- 03
Prototype scope
We write it down on a single page; you approve it and pay for the prototype.
- 04
Build (7 days)
We build the prototype while you follow the progress live via a link.
- 05
Presentation and changes
We present the working prototype and apply one round of your feedback.
- 06
Decision
We go ahead with the full project (prototype price deducted), you keep the prototype, or you get 100% of your payment back.
Who it's for
Property developers
Buyer portal with payment schedule and documents, fit-out changes, defect reports, unit table and sales CRM.
See examples for this industry →Contractors and installers
Jobs and field crews, reports with photos and the customer's signature, service inspections with reminders.
See examples for this industry →Clinics, salons, beauty chains
Bookings for several locations, client records with treatment history, passes and packages, an app for regular clients.
See examples for this industry →
Projects and references
PLANETHERBS S.C.2026Reference letter (PDF, Polish) MIGAN Sp. z o.o.2025Reference letter (PDF, Polish) Konsultacje in vitro Katarzyna Rzycka2024Reference letter (PDF, Polish) ORSA2023Reference letter (PDF, Polish) Fundacja Green Door2021Reference letter (PDF, Polish)
More projects: portfolio →
Who's behind it
Dominik Myszkowski — owner of Knight Software and software architect. He has been designing business applications and leading development teams for over 20 years; computer science graduate of the Warsaw University of Technology.
Dominik personally leads your project from the first call to deployment and is responsible for the solution's architecture. The app is built by a team of experienced developers that he leads. You get one accountable partner — no middlemen, and no handing the project from one person to the next.
Frequently asked questions
How much does the mockup cost?
Nothing. We prepare it after a short call so you can see what your app could look like before you make any decision.
What if I don't like the prototype?
You have 7 days from the presentation to decide. If you withdraw, we refund 100% of your payment, no reason needed. The prototype then stays with us. Before that, you can request one round of changes. Offer terms
What if you don't make it in 7 days?
We refund 100% of your payment.
Why is the prototype available from €3,750?
The prototype is real work we do before any contract is signed, and it makes sense for larger applications. For smaller projects we prepare a free mockup and, if we have a similar finished project, show it to you as a demo — together with a quote.
How much does the full application cost?
It depends on the scope, so we quote every project individually. After the prototype you get a fixed price, and the €725 you paid for the prototype is deducted from it.
What technology do you use?
Proven, widely used technologies (React, Node.js, React Native for mobile apps) that are easy to maintain for years.
Can I later develop the app with someone else?
Yes, if you order the full project with a transfer of the economic copyrights. You then receive the code and documentation and can work on the app with anyone. The free mockup and any prototype you withdraw from (with a refund) remain the property of Knight Software — you don't receive their code or rights to them.
Does it work on a phone?
Yes, the prototype is designed mobile-first.
What about data and GDPR?
The prototype runs on sample data. For the full project we deploy on your infrastructure or on servers in the EU.