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  • Business Website
  • Website with Extra Feature
  • Custom Web Application
  • AI Chatbot
  • All prices at a glance
IndustriesProjectsInsightsAbout me
Contact Free Website Check

48.0494° N · 10.8749° E

Custom Web Application: from Appointment Booking to Customer Portal

For workflows a website builder cannot handle: several features, databases, payments and connections to other software, built around the way you work.

from€2,000Offers for businesses and the self-employed only, prices plus 19 % VAT.

Describe your project Only one feature needed?

What a web application is

More than a website: users log in, data is stored, and several systems work together, such as calendar, payment provider and email.

I develop each application individually, around your workflow. The price depends on the number and complexity of the features, for example when several systems are connected.

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What I build

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  • Online appointment booking

    A scheduler with real calendar sync, for example with Microsoft 365. Bookings around the clock, popular with law and tax firms and practices.

  • Online payment

    Payment services such as Stripe or PayPal, for deposits, fees or subscriptions. Payment happens right after booking.

  • Customer areas with login

    Your customers log in and see their own data. You manage everything in one place.

  • Internal tools

    Tools that take over recurring work. They connect, for example, your customer management (CRM) with your calendar and email.

Further building blocks

  • Small online shops

    Small shops for local products or vouchers. I have not built one for a client yet; what a shop needs legally, I plan with you beforehand.

  • AI features

    Built into your workflow. A ready-made AI Chatbot is available as an add-on.

Real example: online booking for a tax firm

  • Online appointment booking on the Trinity Tax website: steps for appointment type, partner, date and time, personal details, payment

    Online booking with payment: Trinity Tax

    Client project · Tax firm

    New clients book their appointment on the website, in sync with the firm’s Microsoft 365 calendar. The fee is paid online through Stripe.

    To the project
To the portfolio

Running costs

Your application runs on a server account that you create and own. I get admin access for setup and support. You pay the server costs directly to the provider and can see them at any time. I add nothing on top.

I usually use Railway, with servers in the EU (Amsterdam). A small application costs from 5 US dollars a month there, more with heavier use.

Only services on my own servers, such as the AI Chatbot, can carry a monthly fee.

€

Process and handover

  1. 01

    Concept

    We plan features and workflows together. That becomes a fixed price.

  2. 02

    Build

    You get interim versions and test features before they go live.

  3. 03

    Handover

    Code, data and server account belong to you. You are not tied to me and can hire someone else at any time.

  4. 04

    Guarantee

    For 30 days after launch I fix errors and small changes free of charge. After that I bill updates and changes by effort.

Questions about the web application

When is a web application worth it?

When a standard tool is no longer enough: workflows should run digitally, or several programs should work together.

Which features can I have built in?

Depending on the project, for example booking, customer areas, price calculators, payment and connections to software you already use. We decide together which ones are useful for you. For an overview, see the article Which features does my website need?

Who builds it, and how long does it take?

I do, together with a second developer for servers and AI. I remain your contact, from the first conversation to well after launch. Depending on the scope it takes weeks to a few months.

Can the application be extended later?

Yes. I build it so that new areas, more interfaces or automations can be added later without rebuilding.

How does it differ from a website with an extra feature?

The website with an extra feature takes on exactly one simple task, such as a price calculator. A web application connects several features into one tool, for example online booking with calendar and payment or a customer portal with login.

Describe your idea to me

Tell me which problem the application should solve. I tell you honestly whether and how I can build it.

Describe your project
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Contact

Services

  • Business Website
  • Website with Extra Feature
  • Custom Web Application
  • AI Chatbot
  • Free Website Check

Industries

  • Trades
  • Law & tax firms
  • Photographers & creatives
  • Projects

Areas served

  • Web design Munich
  • Web design Augsburg

Location

Landsberg am Lech

48.0494° N · 10.8749° E

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