Contact

We are happy to hear from you. Here is how you can reach us.

General inquiries

Questions, feedback or partnerships? Just drop us an email.

[email protected]

We usually reply within 2-3 business days.

Tool suggestions & bugs

Got an idea for a new tool or found a bug? Email us with [Suggestion] or [Bug] in the subject — that helps us prioritize.

Send suggestion Report bug

Privacy requests

For privacy requests (Art. 15-21 GDPR) you can also reach us by email at the address above. We process requests within one month.

Privacy policy

Legal & complaints

For legal matters or formal complaints, the full provider information is available in our imprint.

Go to imprint

How to reach us fastest

CalcSI is a small, independent project. We read every email personally and handle requests in the order they arrive. A short, factual message with a meaningful subject line helps us route your request quickly and reply appropriately.

What to include in your message

  • A clear subject line (e.g. [Suggestion], [Bug], [Privacy]).
  • For bugs: affected tool, browser, optional screenshot and the steps to reproduce.
  • For tool suggestions: a short description of the use case and, if possible, a concrete example.
  • For privacy requests: the type of request (access, deletion, objection, etc.) and an identifier (e.g. the email address used).

Why no contact form?

A classic contact form requires form logic, spam protection and often stores more data than needed. We deliberately use direct email contact: less data processing, clearer communication and no extra third parties in the background.