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 a pile of spreadsheets I kept rebuilding year after year.

When I retired I finally built the applications I'd wanted that whole time: those spreadsheets, turned into real software and shaped around how I actually work. 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 — an estimate settling out of noisy measurements
The name

A Kalman filter is a piece of math for pulling a clear signal out of noisy data. You feed it a stream of imperfect measurements — each one a little wrong — and it produces the best running estimate of what's actually true, correcting itself as every new reading arrives. It's how Apollo navigated to the Moon, how your phone holds a GPS fix, how control systems stay steady. Rudolf Kálmán published it in 1960; engineers have relied on it ever since.

That's close to what these applications do. Your financial life shows up as noisy, partial data — broker exports, monthly statements, prices that jump around. The software's job is to turn that into a clear estimate of where you actually stand and what to do next, then keep refining it as new information lands. Measure carefully, correct continuously, converge on the truth — locally, on your own machine, with nothing hidden.

I spent a career as an electrical engineer living in this kind of math, so the name fit. You don't need to know any of it to use the apps — but it's the idea underneath them.

Contact

Get in touch.

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

hello@kalmansoftware.com