Privacy Policy

Summary

• Calculator inputs stay in your browser. They are never sent to a server.
• Inputs may be saved to your browser's localStorage for convenience. They never leave your device.
• Google AdSense displays ads and may track interests via its own cookies.
• Anonymous analytics (Vercel Analytics or equivalent) may count visits without identifying you.

1. Information collected

We do not require sign-up and do not collect names or phone numbers. In two cases we collect the minimum you enter yourself:

• Weekly support-program digest: one email address, used only to send the programs matching the conditions you chose. The subscription starts only after you click the link in the confirmation email (double opt-in). We keep it until you unsubscribe, which you can do instantly from the link at the bottom of every email. Nothing is sent after that, and the address is never shared with third parties.
• Attraction comments: your nickname, the comment text, and an irreversible hash of your IP address for spam prevention. The raw IP address is not stored.

Calculator inputs (voltages, salaries, etc.) live only in browser memory, URL query params, and localStorage. If you create a share URL, your inputs are encoded into the URL — sharing that URL shares your inputs with whoever you send it to.

Google AdSense may use cookies and identifiers for ad personalization. Their handling is governed by Google's Privacy Policy.

2. Cookies and local storage

• Local storage: per-tool input restoration. Keys are prefixed worktool:.
• Cookies (ads): AdSense personalization and frequency capping. Block via browser settings.

3. Third parties

• Vercel — hosting and CDN
• Google AdSense — ad display
• Google Fonts (optional) — typography

4. Your rights

Because we do not collect personally identifiable information, there is no central record to delete. To clear locally stored inputs, use your browser's “Clear site data” option.

5. Changes

This policy may change. The current effective date is shown at the top.