Discover CalcuBoss

Contact us

A question, a mistake you spotted in an exercise, an idea, a request about your data? Write to us: we will reply to the email address you give, usually within a few days.

To delete the account or export progress, there is no need to write: you can do it all in the app, from the Parents’ area.

Only used to reply to you.

For a mistake in an exercise, please mention the year group and the calculation.

Your address and message are only used to reply to you and are deleted after one year. Learn more: privacy policy.

Quick answers

  • No sign-in code? Check your spam folder. The code is valid for 10 minutes and you can ask for a new one at any time.
  • A mistake in an exercise? Tell us the grade, the world and the question, for example “Grade 2, world 3: 8 + 7”. We fix these quickly.
  • Premium family: €1.99 a month or €14.90 a year, for up to 3 children on 2 devices. You can cancel in a few clicks, without writing to us.
  • Teachers: tell us your school and your class level, it helps us reply faster.