From zero to live in 2 days: How a personal exam preparation became a platform with 500+ users
Independently developed, launched in a few days, and grown to a platform with over 500 registered users in four months.
March 31, 2026
No learning platform for Class A
While established resources existed for the amateur radio exam Classes N and E, there was no central, modern, and didactically structured learning environment for Class A.
Instead, content was scattered across many sources and had to be painstakingly assembled.
The trigger was personal: After passing my amateur radio exam on December 1, 2025, I wanted to transform the learning system I had developed into a usable platform.
The foundation was already in place: I had researched, structured, and prepared every single BNetzA exam question.
From idea to running system
12db.de was built entirely independently - from the initial idea to the running system.
Tech Stack
Beyond the application, data model, and frontend, deployment and operations were also handled independently - from server setup to production deployment.
The architecture was intentionally kept lean: No unnecessary framework overhead, but a setup that enables fast decisions and immediate execution.
Screenshots
Measurable growth in 4 months
Within four months, an early MVP evolved into a platform with continuously growing usage and stable demand.
User growth (confirmed registrations)
Organic demand in a clear niche
Organic visibility was strategically built around search queries that drive real usage and registrations. Despite limited search volume in this niche, 12db.de already ranks in the top 10 - often top 3 - for many relevant keywords. About 70% of organic traffic comes from Google, with another 30% from Bing and other search engines.
Content and features
Community and trade press
- Recommendations by DARC instructors
- Links from district chapter pages
- Feature in FUNKAMATEUR trade magazine
- Discussions and recommendations in the community (incl. QRP Forum)
Community feedback flows directly into ongoing development.
What worked particularly well
Community as an integral part of the product
12db is licensed under CC BY-SA 4.0. Every page has an "improve this page" function. This actively involves the community - not just as users, but as co-creators.
Fast execution on impulses
The decision to adopt an open license was triggered by community feedback and implemented the same day. Good product decisions often emerge from dialogue - what matters is the speed of execution.
Direct iteration instead of lengthy planning
Development, product logic, and content creation were all in one hand. Bugs, additions, and feature ideas could be implemented without delay - fast decisions, consistent product logic, deep execution.
From problem to growing product
12db shows how a concrete personal problem can become a usable product with real demand in a short time.
Visit the platform: 12db.deWant to build a product that attracts users?
I built 12db independently from idea to running platform. If you want to go from idea to real usage fast - let's talk.
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