About ReadyStack

What we make

Free online tools that finish one real job with this year’s official rules and forms — in English, German, Japanese, Spanish and Portuguese. A salary or tax calculation, an official CV or invoice layout, a deadline check: you get the result on the page, free. The paid version adds what comes next (the file to keep, saved cases, more runs, team use).

Who we are

ReadyStack is a small independent software studio. We build with AI-assisted automation, and every tool is checked against its official source before it goes live. We do not give tax or legal advice: our tools apply the published rules and show the source, so you can check us.

How we keep it right

We read official sources every day (for example the US Federal Register, GOV.UK, gesetze-im-internet.de, Japan’s e-Gov, Spain’s BOE and Brazil’s gov.br). When a rule changes, the tool changes and shows the new date. See How we verify.

When we got it wrong

On 11 October 2026 a Python release manager publicly pointed out that we had given the wrong end-of-life date for Python 3.10. We thanked him, corrected the date on every page, extension and package the same day, and deleted the wrong posts. If you find an error, tell us and we fix it the same way.

Paying and contact

Payments run on Whop’s checkout — your card details go to Whop, not to us. Questions: [email protected] (we answer within 2 business days).