Why I Started Building a Personal Financial OS

For years, I relied on a legacy personal finance app to keep track of my finances. It had served me well, but it was no longer fully supported, and its limitations became more apparent over time.

The problem went beyond that one app. Personal finance software can be good at recording transactions and showing account balances, yet still fall short when it comes to understanding what those records mean. I wanted more control over the inputs, more transparency about how conclusions were reached, and analysis that could answer the questions I actually had. The gap between recording financial activity and making sense of it was wide enough that I began building tools of my own.

I started with Excel. One spreadsheet helped with a particular task; another handled something the first one couldn’t. Over time, those tools became increasingly elaborate. They addressed real needs, but the information and processes were scattered across the legacy app and a growing collection of spreadsheets.

I wanted to bring them under one program—with a stronger foundation for both the financial records and the analysis built from them.

The idea was not to build a giant application all at once. It was to create a dependable system for the work I was already doing: recording transactions, understanding spending, tracking investments, and eventually exploring plans and scenarios. The financial records would remain the source of truth, while reports and planning tools would build on those records.

That became the starting point for the Farenor Personal Financial OS. It began as a practical effort to make my own financial system more coherent and easier to maintain. I’m developing it in stages, testing each part as it takes shape, and keeping personal financial data private.

This series will follow that process: the problems that led me here, the tools I had built along the way, and the decisions involved in bringing them together.