Terms of use

The service

CellKata offers free Excel formula lessons and a function reference. You can use it without an account; signing in is optional.

Your account

Keep access to your email account safe, since sign-in links are sent there. You can stop using the site and ask us to delete your account at any time.

Fair use

Please don't:

• try to break into the site, other accounts or the database;
• copy the lessons or the function reference in bulk, or scrape the site;
• manipulate points or the leaderboard;
• send spam or abusive messages through the contact form.

Our content

The lessons, exercises, example data and function reference were written for this site and belong to [operator name]. You're welcome to use what you learn anywhere, of course, including the formulas.

No guarantee

We work to keep the lessons correct and the site available, but it is provided as it is, without guarantees. The spreadsheet in the browser behaves like Excel in most cases, but not all; your own Excel is the final word.

Liability

[Limitation of liability, to be written for the operator's country.]

Trademarks

Microsoft and Excel are trademarks of Microsoft Corporation. This site isn't affiliated with or endorsed by Microsoft.

Changes and law

We may update these terms; the date at the top shows the latest version. [Governing law and place of jurisdiction.]