Hey, I'm Christiaan.

Father of three, Haarlem, Head of Marketing at Nordcloud (IBM).

Train four times a week. Mix of airbike and strength training. Wanted a solid training program without paying €400-800 per month for a personal trainer. Progressive overload, periodization, RPE. That didn't exist as an app. So I built it.

CoNudge was built with Claude Code through P2P Concepts, my freelance company. No developer background. Vibe-coder. Three weeks from idea to working product.

Then I realized: personal trainers need this just as much. Not as a replacement, but as an assistant. Hours lost writing programs in Excel and Notion. The same structure, over and over. While their real value is in the coaching itself.

That's why CoNudge is now a tool for PTs. You set the methodology. The AI writes the program. You review and approve. After every block: automatic evaluation. You adjust.

The name? Co + Nudge. Together, a gentle push in the right direction.