steefware.com
Simple, free web tools. No cookies, no ads, and historically terribly indexed on Google — so congrats for getting here. (In Safari, press "Share" → "Add to Home Screen" for the best Appsperience!)
Serious tools
Aflossingstabel
Open →Mortgage / loan repayment table, deterministic and transparent.
VVPRBIS
Open →Clear, focused tooling for Belgian VVPR-bis dividend planning.
Tank Level Calculator
Open →Simple calculator for tank fill levels.
SolarFit
Open →Tooling to determine optimal solar panel fitment on a roof. Geometry first. Assumptions explicit.
Solar Forecast
Open →Look how Sun Today! Expected solar production based on the weather.
Password Generator
Open →Self-explanatory. Runs entirely in your browser.
WLED P1 Flasher
Open →Flash WLED with the HomeWizard P1 usermod straight from your browser. Your energy use, as a light.
Triangle Calculator
Open →I many smart now! Right triangles: hypotenuse, angles and area from the two legs.