Never forget a lead again. In 9 steps you build a customer database with AI that fits exactly how you work. No coding knowledge, no subscription, and it simply lives on your own laptop.
Your clients are in a spreadsheet, your appointments in your calendar and your notes all over the place.
You sometimes forget to chase a quote, and that costs you clients.
CRM software is too expensive, too complicated or made for a sales team.
You don't want a monthly subscription for something only you use.
"What were we talking about again?" just before you call someone.
You're curious about vibe coding, but don't know where to start.
You don't need to buy a CRM and you don't need to learn to code. You build exactly what you need, step by step, with AI.
By the end of the training you have a customer database with your stages, your data and your colours. See the example: that's roughly what you'll have.
At the top you see who to call or email today, and who you've left waiting too long.
See at a glance who is at the intro, proposal or client stage, using your own stages.
A timeline per contact, so before every call you know where you left off.
Your data lives on your own laptop, and with one click you have a backup you can restore.
You don't read about AI, you use it to build your own working tool.
And because you learn the approach, you can then use the same build brief to build a quoting tool, time tracker or mileage log.
You describe in plain language what you want, Claude builds it, and you test and adjust. You don't need to install anything. More about vibe coding (Dutch).
Using the template, you write down who uses the tool, which stages your clients go through and what you want to see every morning.
You copy the prompt, paste in your build brief and within an hour you have a first version that works.
In each step you add one feature, with a short list of what you should see afterwards. That way you always know it works.
Each step has a short explanation, a prompt to copy and a short list of what you should see. Allow a few evenings or a quiet Saturday.
Your Claude account, a folder for your tools and the three rules for talking to Claude well.
What should your CRM be able to do? With the template and a prompt that sharpens your build brief.
Claude builds your tool, and you put it on your own computer.
Editing and deleting contacts, and the save test.
Next actions, today's list, search and notes per conversation.
A board with your stages and the numbers that matter.
Your own name and colours, and a tool that also works nicely on a small screen.
A one-click backup, and handling client data safely.
Letting your tool grow with you, and building your next tool with the same approach.
Plus a troubleshooter, a glossary and a certificate.
A laptop or computer with Google Chrome or Microsoft Edge, and a free Claude account.
Claude Pro while you build. Then you can keep working longer in one go before you hit a limit.
A few evenings or a quiet Saturday. You go at your own pace and keep lifetime access.
Your CRM lives in your browser on your own laptop. No client data goes to Studio van Duijn or to a server.
After payment you log in to the Academy and the workbook is ready for you.
The course material is in Dutch for now.
Pay by iDEAL or credit card via Stripe's secure payment page. You'll receive an invoice by email. Questions? Email me.
Rather build together, with me by your side, in English or Dutch? Then take a look at the live day training Build your own business tool.
My background is online marketing and SEO, not tech. Even so, I built my own Urenboek with AI, where I keep track of my hours, clients, invoices and SEO. What I learned along the way, I put into this workbook: in plain language and in small steps.
Every prompt in the workbook has been tested by building a complete CRM, from build brief to backup.
See my Urenboek (Dutch) →No. You describe in plain language what you want and Claude writes the code. At every step, the workbook tells you exactly what to do and what you should see afterwards.
A free account is enough. With Claude Pro you can keep building longer in one go. Many people take Pro for a month while they build.
On your own laptop, as a single file you open in your browser. Your data doesn't go anywhere, and you don't pay a subscription. You also learn how to make a backup.
Your CRM is meant for your laptop, because that's where your data is. If you want to use it on several devices or with a colleague, you need an online version with logins. That's a next step, or something I can build for you to order.
Allow a few evenings or a quiet Saturday. You set the pace yourself and keep lifetime access to the workbook.
The prompts are written and tested for Claude. The approach also works in other tools, but the explanations in the workbook assume Claude.
The workbook has a troubleshooter covering the things almost everyone runs into at some point, each with a prompt to fix it. If you really can't work it out, email me.
After payment you log in to the Studio van Duijn Academy with your email address. The workbook is under Mijn trainingen (My trainings). You'll also get the link by email.
Your own CRM, built by you, exactly the way you work.
Online training €147 excl. VAT (€177.87 incl.)
Start now →9 steps · 16 prompts · lifetime access · course material in Dutch for now