Year: 2026
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Connecting your app to banks costs €7,200 a year before you have a single customer
I asked for prices so Cuéntamo could read my bank: €600 a month, €7,200 a year in fixed cost before the first customer. Why bank aggregation has no ramp —and the open-source alternative I built for any finance app.
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Your data, in your hands: why I built Habeas
Although the GDPR recognizes the right to data portability, most companies still do not provide practical ways to export personal data. Habeas solves this with a browser extension that extracts data directly from the user’s authenticated session, without intermediary servers or shared credentials, using auditable YAML adapters for each service.
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Why I Built My Own Personal Finance App
Managing finances as a self-employed professional in Spain often means juggling spreadsheets, multiple apps, and constant uncertainty. After years of searching for a tool that combined cash flow forecasting, tax management, and personal finances, I ended up building it myself. That’s how Cuéntamo was born.
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The Lice Conspiracy: Someone Had to Do the Math
Could pharmaceutical companies deliberately spread head lice to boost shampoo sales? Probably not. But after examining the biology, logistics, economics, and available evidence, I found the question far more technically plausible than the usual dismissals suggest. Sometimes the interesting part is not the conclusion, but the numbers.
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UI tests are the guardrails an AI needs: the story of clipboardwire
I built clipboardwire to synchronize the clipboard between Linux (Wayland) and Windows. After rejecting existing alternatives, I designed the architecture and security model while Claude Code wrote the implementation. Automated tests, including GUI tests, enabled safe iteration without regressions. The result is a lightweight, open-source utility.