Hagen

Independent developer building 100% offline, local-first desktop software. Currently launching FinFortress. I write about Python, local machine learning, and taking back your data sovereignty at explorethecosmos.org.

Products

Everything I have currently online.

FinFortress

A local-first desktop tool built with Python, Streamlit, and Plotly. It allows users to drop in their raw bank CSVs and use a local text classifier to auto-categorize expenses entirely on their own CPU. No cloud APIs, no subscriptions, just full financial data sovereignty.

Launched Just launched.