Custom Web Application Development
We build web applications in Next.js and TypeScript, with a PostgreSQL or Supabase database, automated tests and deployment in the EU (Frankfurt). A validation pilot — authentication, database, one or two integrations, tests, deployment — ships in 3–6 weeks from 90,000 CZK; a production version with roles, payments and more integrations runs 250,000–700,000 CZK.
What's included?
The same technologies we use on our own products: Next.js, TypeScript, PostgreSQL or Supabase, automated tests and CI, deployment on Vercel. On payment you own 100% of the source code and documentation, and another team can take the project over without training on a proprietary tool.
Where does this run in production?
In two products in production and one pre-launch. Innea and Innea Pro (both live) share one codebase with each user's data isolated in the database itself (Row Level Security) and thousands of automated tests, whose counts are in the case study. Legacy You (pre-launch) is a web app and a native mobile app for iOS and Android on one Supabase backend — with accessibility as a requirement in the automated checks (CI), not a promise. You get the same technologies, the same tests, the same deployment.
Frequently asked questions
How long until the first usable version?
A validation pilot in 3–6 weeks: a working version in production with authentication, a database, one or two integrations, tests and deployment — not a prototype without a database or tests. If the brief isn't clear yet, a paid discovery for 25,000 CZK comes first, deducted from the project price.
Where does the app run, and what does it cost to operate?
On Vercel in the EU (Frankfurt) with a PostgreSQL or Supabase database in the same region — the same as our own products. We calculate the running costs from the expected load during the consultation, so the hosting bill holds no surprises.
Can you connect to an existing database?
Yes. We first audit the schema and design a connection or migration without data loss — every irreversible database change is approved by a human, a rule we keep on our own products too.
What if I want to change the scope?
A smaller change is folded into the next step — we work in short iterations. A bigger change of scope affects only the estimate for the remaining work, not what is done and paid for; you hear about it immediately, not on the invoice.