Kalman Software

Local-first money software, built by an engineer who uses it on his own portfolio.

Desktop applications for managing your own money — rebalancing, retirement planning, trade journaling. Everything runs on your machine. No accounts, no subscriptions, nothing uploaded.

100% local No account or subscription Nothing uploaded
Products

Two tools, one principle: your data stays yours.

Why Kalman Software

I'm a retired electrical engineer. For decades I managed my own money — trading stocks, rebalancing, planning the retirement drawdown — out of spreadsheets I kept refining and improving year after year.

When I retired, I set out to learn the newer programming languages and finally build the tools I'd always wanted — turning decades of my own knowledge and the workflow those spreadsheets captured into real software.

They run entirely on your own computer, the way they run on mine — no accounts, no subscriptions, no data leaving your machine.

If they fit how you manage your money, they're yours to use.

The Kalman Software mark — a K with a signal swoosh
The name

Where the name comes from

  • Why “Kalman”?

    A Kalman filter estimates the true state of a system by continuously combining what it predicts with what it actually measures — trusting whichever is more reliable at each step. That discipline is the idea underneath these apps.

  • What is a Kalman filter?

    An algorithm that turns noisy, incomplete data into the best estimate of what's really happening: predict the next step, compare it to reality, correct by how far off it was. It's how Apollo navigated and how GPS holds a fix. (Rudolf Kálmán, 1960.)

  • How it applies to the apps

    Your finances can be noisy, chaotic, and confusing — scattered across accounts, statements, and spreadsheets. That's what the apps are for: they bring process and clarity, helping you cut the noise down to a clear picture of where you stand and what to do next. Locally — nothing uploaded, nothing hidden.

I first ran into this kind of math studying electrical engineering years ago, and it stuck with me, so I named the company after it. You don't need to know any of it to use the software — but it's the idea underneath it.

Contact

Get in touch.

Questions, bug reports, or want an early CrucibleTrade build? Send a note — it comes straight to me.

hello@kalmansoftware.com