Contact

We read every message and usually reply within two business days.

Address: Unit B389, Room 9099, Rm 903-904, 9/F, Block A, Hing Win Centre, 15-17 Hing Yip Street, Kwun Tong, Kowloon, Hong Kong

What to include

For a question about a result, tell us which calculator you used and roughly what you entered. Please do not send full statements, account numbers or other sensitive details; we never need them to help.

Privacy requests

Saved calculator history is held in your browser; you can remove it by clearing this site’s browser data. For questions about technical logs, older calculator links, cookies, advertising or your rights under our Privacy Policy, email us with “Privacy” in the subject line.

Corrections and suggestions

If you spot a mistake in a guide or have an idea for a feature that would help your household, we would like to hear it.