Web apps that simplify your day
When spreadsheets, email ping-pong and paper forms eat your time, a custom web app is often the cheapest fix. KSTAQ builds customer portals, booking systems and internal tools around the way you actually work.
At a glance
- Price
- from €3,999
- Duration
- 6 to 12 weeks
- Runs on
- browser, phone, tablet
- Access
- login, roles, permissions
Software that works the way you do
Off-the-shelf software forces you into someone else’s process. A KSTAQ web app reflects how your business really works and grows with it when things change.
Web apps run in the browser, with no installation, on any device. Your team and customers only need a link and a login.
- Customer portal with documents, status and messages
- Online booking and resource planning
- Dashboards combining numbers from several systems
- Forms and approvals instead of paper and email
- Integration with existing software via APIs
From idea to rollout
Process analysis
Together we find where time is lost today and what the app really has to do.
Clickable prototype
Before any code is written, you test the flow on a prototype, while changes are still cheap.
Login & permissions
Secure sign-in, roles for team and customers, everyone sees only what they should.
Database & integrations
Your data lives in a structured database and talks to accounting, CRM or calendar.
Onboarding
I walk your team through the app and deliver a short guide to look things up.
Maintenance & growth
Updates, security and new features, handled long term if you like.
What clients usually ask first
Does this fit your project?
Describe briefly what you have in mind. You will get an honest assessment within one business day.
What is the difference between a web app and a website?
A website informs, a web app gets work done. In a web app users sign in, create records, book, upload documents or approve requests.
How much does a custom web app cost?
Web apps and internal software start at €3,999. The exact price depends on the processes, roles and integrations the app covers and is agreed as a fixed price after the process analysis.
Where is the data stored?
In a PostgreSQL database. We agree on the server location together, connections are encrypted and backups run automatically.
Can features be added later?
Yes. The architecture is built to grow. Many clients start with one core process and extend the app step by step.
Often goes together
- Web design & websitesGet a custom website built in Dortmund: fast, optimised for Google and easy to edit. From €999, live within a few weeks.
- SaaS developmentSaaS development from Dortmund: from MVP to a running product with subscriptions, payments, user management and an admin area. For founders and companies.
- SEO & GEOSEO and GEO from Dortmund: get found on Google and in AI answers like ChatGPT and Google AI Overviews. SEO plan €299 a month, cancel any month.
Let’s talk about it
The intro call is free. You get an honest assessment and, if you like, a fixed-price proposal.