Frequently asked

Yes, for fixed-price packages. For "from" packages, the Specification step fixes the final number in writing before build starts — it doesn't move after that without a written, priced change.

Fixed-scope packages: 50% on start, 50% on delivery. Retainers: monthly in advance. Invoice/bank transfer is the standard route; the site's checkout also supports a demonstration card flow for testing the purchase experience (see the Payment step at checkout).

We don't publish a standard discount, since most multi-package projects get scoped as one combined engagement with its own specification and price — ask on /contact/ if you're combining two or more services.

EUR, ex-VAT. Czech clients can request a CZK invoice; EUR remains the reference price.

Yes — see the Refund & Cancellation Policy for the exact terms depending on how far into the engagement you are.

One decision-maker who can approve the specification and attend (or review the recording of) the weekly demo. That's the practical minimum.

Normal. The Survey step exists to build one with you — most engagements start without a finished brief.

Both. Team Extension embeds our engineers in an existing team and roadmap; most of the seven productised services also integrate with an existing codebase or backend where relevant.

"Done" is checked against the written Specification from step 02 — that document is the reference for both sides, not a judgment call made after the fact.

You do, in full, on final payment — source, IP, documentation, credentials. Stated plainly in the Terms of Service.

Yes — devexpertsstudio is based in the Czech Republic, in the EU, and the Privacy Policy states exactly what's collected and why.

Yes, for engagements where confidentiality matters before a written agreement is in place — raise it on /contact/ and we'll send one ahead of the Survey step.

Czech law, stated in the Terms of Service, for both commerce transactions and direct engagements.

Named per service on each service page and in full on /about/ — no proprietary framework, so there's nothing locking you to us for maintenance.

During — weekly demos are of the real, running codebase, not a separate demo environment.

Usually, yes — Custom Software Development, Web Application Development, and Software Modernization & Consulting are all commonly bought against an existing system.

Where they genuinely speed up the work without compromising quality, yes, as part of the engineering process — the specification, weekly demos and Verification step are what guarantee the outcome, not the tools used to get there.