Marc

Kumiko founder

Products

founder https://kumiko.rocks

Cashcolt
Cashcolt is a loan and amortization calculator for households and advisors. Live repayment schedule, overpayments, debt-free date, multi-loan portfolio dashboard, and a repayment optimizer that shows where extra payments save the most interest. Free calculator without signup. GDPR-compliant, hosted in Germany, zero tracking cookies.
publicstatus
Status pages with incident timelines
$undefined/mo

Recent activity

I shipped v2 with zero paying customers. Here's the honest version.

Where do you draw the line when agents can call real tools?

Shipped: 5 critical bugs fixed on JewelViz this week.

17yo solo founder building AI invoice generator — launching Aug 4

I built a free e-signature tool that doesn't make you create an account — would love feedback

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