Terms of use

Purpose

These terms govern the use of Calculus, a free mental arithmetic site published by ddx. Using the site, and in particular creating an account, means you accept these terms.

The service

Calculus is free. You can play without an account, as a guest; an account keeps your statistics, history, Elo and friends.

The service is provided as is. It may be interrupted for maintenance, changed or discontinued, and the publisher does not guarantee continuous availability.

Your account

• Use a valid email address: it is how you recover your account.
• Keep your password to yourself: you are responsible for what is done with your account.
• If you are under 15, ask a parent before signing up.

Game and conduct rules

Your username must not be offensive, hateful, discriminatory or sexual, impersonate anyone, or contain contact details. It is also forbidden to:

• cheat, in particular with a program that answers for you;
• exploit a flaw in the site or try to disrupt it;
• create several accounts to distort the leaderboard or Elo.

Sanctions

If these rules are broken, the publisher may change the username, reset statistics and Elo, or suspend or delete the account. Except for serious misconduct, a warning is sent first.

Leaderboard and Elo

The leaderboard and Elo are for information only and carry no reward. They may be corrected or recalculated, for example after cheating.

Deleting your account

You can delete your account at any time from your profile. Deletion is immediate and permanent.

Intellectual property

The site, its texts, design and code belong to its publisher. You may not copy or reuse them without permission.

Liability

The publisher does their best to keep the site working, but cannot be held liable for service interruptions or data loss (statistics, history), within the limits set by law.

Personal data

How your data is processed is described in the privacy policy.

Changes to these terms

These terms may change. Significant changes will be announced on the site; continuing to use it afterwards means you accept the new version.

Governing law

These terms are governed by French law. In case of disagreement, first write to contact@calculusonline.fr to seek an amicable solution. Failing that, the dispute will be brought before the competent courts.

This English translation is provided for convenience; the French version prevails.