What you agree to

What you are using

A set of Excel exercises that grade a formula in your browser and name the rule you missed. It is a functional copy of excelexercises.com, rebuilt from scratch. It is not affiliated with, endorsed by or connected to that site or to Microsoft.

Excel is a trademark of Microsoft Corporation. This site teaches spreadsheet formulas and is not an official Microsoft product or training material.

Free exercises, and the paid track

Which ten are free is not a matter of position. The set is curated and named on the start page, and it runs from the opener to a two-condition sum. Nothing in this repository moves one of them behind the wall later.

10 exercises are free forever, with no account and no card, and every payment carries a 100% refund guarantee inside 30 days. The other 76 come with the track, one price for all of them: $9.99 a month, $39.99 every six months or $59.99 a year.

Every plan renews for another term of the same length unless you cancel: a month, six months or a year, whichever you bought. Cancel from your account page in one click, and the time you already paid for runs to its end. The price does not change for the term you are in.

Where checkout is not open, the price above is what the page says rather than what it charges, and the paid exercises open free in this browser. Where it is open, the term you pick is the one that gets charged.

Your account

Use an email address you can receive mail at, because that is how a password reset reaches you. One account per person.

Keep your password to yourself. Anyone holding it can read the progress on the account. If you think it has leaked, change it from the account page and sign the other device out.

You can delete the account whenever you like, without asking, from the account page.

Fair use

Do not:

• Scrape the site at a rate that degrades it for other people, or run it through a load test without asking first.
• Resell, sublicense or republish the exercises, the copy or the grading logic.
• Try to break the grader into showing a verdict the formula does not deserve: it is the thing being taught.
• Attempt to reach another learner's rows, or probe for one.

Feedback you write

The note you type in the feedback box is yours. Sending it lets this site read it and act on it. In practice that means fixing the exercise it is about, and nothing more. The note is not published, not attributed, and not used for advertising.

Keep other people's information out of it.

What belongs to this project

The exercise scripts, the lesson text, the design and the grading rules are this project's work. You may read the source, learn from it and run it yourself. You may not republish it as your own teaching product.

The formulas you write are yours, and always were. Nothing here claims any right over a spreadsheet you made.

A grader is a teaching aid, not an authority

Excel's formula rules vary by version and by locale. A decimal separator may be `.` or `,`, a list separator `,` or `;`, and a function may exist in one release and not another. This grader implements a stated rule set and tells you which rule you broke.

So a red verdict means this site's rules were not met. It does not mean Excel will reject the formula, or that your spreadsheet is wrong. If a verdict looks wrong, say so: a grader that punishes a correct formula is a bug worth fixing, and the feedback box reaches the person who can fix it.

No warranty, and the remedy

This is a study aid offered as it is. There is no promise that every exercise matches the current version of Excel, that the site is uninterrupted, or that it will teach you everything about spreadsheets.

If it does not do what this page says it does, the remedy is a refund under the guarantee above. That is the extent of the remedy, and it is stated here rather than buried in capitals.

Ending it

You can end it whenever you like: delete the account and the sessions end with it.

An account can be suspended for the fair-use items above, in practice for attacking the site or another learner. A suspension is not a deletion. Your progress is still there, and the message says what happened.

Changes

These terms are part of the repository and carry the build date you are reading. A material change lands as a commit with the reason in it.

The status of this page

It was written by reading the code that enforces it: the schema in supabase/migrations/, the routes in app/api/, and the grading rules in packages/grader/. That makes it accurate about this build. It has not been reviewed by a lawyer, and before money changes hands it should be.

Write to danil.gorbunofff@gmail.com with anything that looks wrong.