We read every message. The fastest way to reach us is email:
What to write about
- A wrong number? Tell us the calculator, what you entered, and what you expected. We will investigate and fix confirmed errors.
- A tool you would like? Suggest it, we keep a running wish list.
- Partnerships and advertising. Mention your company and what you have in mind.
Please do not send personal financial documents or passwords; we will never ask for them.