Kelvona started as a personal yearly costs kept in a notebook. The notebook worked because it asked nothing: no accounts to impress, no streaks to mourn. The app keeps exactly that spirit and adds the two things paper cannot do — a weekly review that notices drift, and exports that keep your history yours.
Three things guide the build: readable first, manual-first privacy, exports that never break. Everything else is decoration and gets removed.
No investors to perform for — the price covers servers and salaries, and that is the whole business model.
If a chart needs a legend to explain itself, it does not ship.
Every byte you put in can come back out as CSV.
Manual entries first; connections optional, encryption standard.
We measure weeks kept, not minutes spent.