English translation, provided for convenience. Only the French version is legally binding.
Terms of sale and use
These terms apply to any use of Cortex, free or paid, and to any purchase of credits or of a subscription. They are written in French, and only the French version is legally binding. Version 2026-10.
1. Who provides the service
Cortex is provided by Benjamin Abensur, sole trader (entrepreneur individuel, EI), trading as Benabens, 8 rue du Général Ducrot, 67000 Strasbourg, France, SIREN 130 707 144 (the "publisher"). Phone: +33 7 69 95 30 33 · e-mail: abensur.benjamin@gmail.com. The rest of the legal information is in the legal notice.
2. What Cortex is
Cortex is an online exam-preparation service. You import your own course material; Cortex builds a study programme from it weighted by past exams, generates practice questions, exercises, multiple-choice tests and mock exams in the format of your course, corrects your answers and keeps track of your weak points.
This content is produced by an artificial intelligence model and can contain errors. Before showing you a generated question, Cortex has it reviewed by the model itself; this review does not guarantee that a question, a solution or a grade is correct. Cortex is a study aid: it does not replace your course, your teachers or the official exam.
Technical requirements. Cortex runs in a recent web browser, with an internet connection and a Google account. There is nothing to install.
3. Your account
You sign in with a Google account, and you are responsible for access to it. One account is for one person; sharing an account is not allowed.
Cortex sets no minimum age. Purchases (credits, subscription) are reserved for adults, or for minors who have the agreement of their legal representative. If you are under 15, the privacy policy explains the consent that is required.
4. Plans and prices
- Free: 2 credits offered at sign-up, once.
- Pro monthly: 14.90 € a month, with 20 credits every month.
- Pro yearly: 119 € a year, with 20 credits every month.
- Pack of 10 credits: 9 €, one-off purchase, open to every account.
Prices are in euros. VAT not applicable, art. 293 B of the French General Tax Code (CGI): the price shown is the total price you pay, with no additional fees. The price that applies is the one shown at the time of payment.
5. Credits
Credits pay for what Cortex generates for you:
- 2 credits: a full mock exam of up to 8 exercises, or preparing a new course;
- 1 credit: a standard-size multiple-choice test (20 multiple-choice questions and 3 open questions), an exercise, a study programme, or detecting the exam format of a course;
- 0.1 credit: each assist, that is a practice question, the correction of one of your answers, or the analysis of a weak point.
Longer exams. When you set the size yourself, the price follows: a mock exam costs 1 more credit for every 4 exercises beyond 8; a multiple-choice test costs 1 credit for every 26 points, a multiple-choice question counting for 1 point and an open question for 2.
Format detection. When you add a reference past exam to a course, Cortex runs the exam-format detection for that course again, for 1 credit, if your balance allows it; otherwise the past exam is added without detection.
Daily limits. Each account, Free or Pro, can start at most 3 generations and 20 assists a day. These limits protect the service from abuse. If they change, you are told in advance.
Validity. Credits bought in a pack and credits offered at sign-up never expire. The 20 monthly credits of a Pro subscription are not carried over to the next month.
Failures. A generation or an assist that fails before the request is sent to the AI model is credited back automatically. If it fails afterwards, write to abensur.benjamin@gmail.com: every request is looked at, without prejudice to the legal guarantee of conformity (section 9).
6. Ordering and payment
Before your first purchase, and whenever these terms change, the app asks you to accept them; the version you accepted and the date are recorded. You also expressly ask for immediate access to the service (see section 8).
Payment takes place on a payment page operated by Stripe: the publisher never has access to your card details. The contract is concluded when the payment is confirmed, and the credits or the subscription are granted as soon as it is.
Every payment gives rise to an invoice. You can get a copy on request at abensur.benjamin@gmail.com.
7. Pro subscription
Term and renewal. The subscription runs for one month or one year, depending on the plan you choose. It renews automatically for the same term until you cancel it, and the price is charged at the start of each period.
Cancellation. You can cancel at any time, at no cost, from My account: the "Manage my subscription" button opens Stripe's customer portal, where cancelling takes a few clicks. Cancellation takes effect at the end of the period already paid: you keep Pro access and the month's credits until that date, and nothing is charged afterwards. Outside the right of withdrawal (section 8), the current period is not refunded.
Yearly plan: reminder before renewal. No earlier than three months and no later than one month before the end of each subscription year, the publisher informs you by e-mail of the renewal date and of your option not to renew. If you were not sent this information, you can cancel free of charge at any time from the renewal date, and whatever you paid for the period after cancellation is refunded within thirty days (article L215-1 of the French Consumer Code).
Price changes. If the subscription price changes, you are told by e-mail at least one month in advance. The new price only applies from the next period, and you can cancel before then.
Deleting your account. Deleting your account ends your subscription: the publisher cancels it with Stripe when the account is deleted, with no refund of the current period outside the right of withdrawal (section 8). If a payment were taken after the deletion, write to abensur.benjamin@gmail.com: it is refunded.
8. Right of withdrawal
If you are a consumer, you have 14 days from the day of your purchase to withdraw, without giving any reason and without any penalty (article L221-18 of the French Consumer Code). How it works depends on what you buy.
Credit pack (digital content). Before paying, you expressly ask for immediate access to your credits and acknowledge that you lose your right of withdrawal as soon as you start using them (article L221-28, 13°). As long as you have not used any credit of the pack, you can therefore withdraw within the 14 days and get a full refund. Once a credit of the pack has been used, the right of withdrawal no longer applies.
Pro subscription (digital service). The 14-day right of withdrawal applies even if the subscription started immediately at your request. If you withdraw, you only pay for the service provided until the day you inform us of your decision, calculated pro rata to the days elapsed in the period paid, and the rest is refunded (article L221-25). The subscription ends and its unused monthly credits are removed.
How to withdraw. Before the period ends, you can withdraw online, in the app: in My account, the "Withdraw from a purchase" section ("Me rétracter d'un achat") lists your purchases of the last 14 days and records your withdrawal, which the publisher acknowledges by e-mail. You can also send us a clear statement, by e-mail to abensur.benjamin@gmail.com or by post to the address in section 1, using the model form in the appendix if you wish. It is enough to send your statement before the period ends.
Refund. You are refunded no later than 14 days after we receive your decision, through the payment method used for the purchase, at no cost (article L221-24).
9. Legal guarantee of conformity
The publisher is liable for any lack of conformity of the digital content and services it supplies. The two boxes below translate the statements required by the French Consumer Code: the first for the Pro subscription, supplied continuously (article D. 211-4), the second for credit packs, where each generation is a separate supply (article D. 211-3). To use these guarantees, write to abensur.benjamin@gmail.com describing the problem.
Pro subscription
The consumer is entitled to the legal guarantee of conformity if a lack of conformity appears within one month for the monthly subscription or one year for the yearly subscription, and again for each renewal period, from the supply of the digital content or digital service. During that period, the consumer only has to establish that the lack of conformity exists, not when it appeared.
The legal guarantee of conformity includes the obligation to supply all updates needed to keep the digital content or digital service in conformity for one month for the monthly subscription or one year for the yearly subscription, and again for each renewal period.
The legal guarantee of conformity entitles the consumer to have the digital content or digital service brought into conformity without undue delay following the request, free of charge and without significant inconvenience.
The consumer can obtain a price reduction while keeping the digital content or digital service, or end the contract and be refunded in full in exchange for giving up the digital content or digital service, if:
1° The trader refuses to bring the digital content or digital service into conformity;
2° Bringing the digital content or digital service into conformity is unjustifiably delayed;
3° The digital content or digital service cannot be brought into conformity without costs imposed on the consumer;
4° Bringing the digital content or digital service into conformity causes significant inconvenience to the consumer;
5° The lack of conformity persists despite the trader's unsuccessful attempt to bring it into conformity.
The consumer is also entitled to a price reduction or to terminate the contract when the lack of conformity is so serious that it justifies an immediate price reduction or termination. The consumer then does not have to ask first for the digital content or digital service to be brought into conformity.
Where the lack of conformity is minor, the consumer is only entitled to terminate the contract if the contract does not provide for payment of a price.
Any period during which the digital content or digital service is unavailable while it is being brought into conformity suspends the remaining guarantee period until conforming digital content or a conforming digital service is supplied again.
These rights result from articles L. 224-25-1 to L. 224-25-31 of the French Consumer Code.
A trader who obstructs in bad faith the application of the legal guarantee of conformity is liable to a civil fine of up to 300,000 euros, which may be raised to 10% of average annual turnover (article L. 242-18-1 of the French Consumer Code).
The consumer also benefits from the legal guarantee against hidden defects under articles 1641 to 1649 of the French Civil Code, for two years from the discovery of the defect. This guarantee entitles the consumer to a price reduction if the digital content or digital service is kept, or to a full refund in exchange for giving it up.
Credit packs
The consumer has two years from the supply of the digital content or digital service to enforce the legal guarantee of conformity if a lack of conformity appears. For one year from the date of supply, the consumer only has to establish that the lack of conformity exists, not when it appeared.
The legal guarantee of conformity includes the obligation to supply all updates needed to keep the digital content or digital service in conformity.
The legal guarantee of conformity entitles the consumer to have the digital content or digital service brought into conformity without undue delay following the request, free of charge and without significant inconvenience.
The consumer can obtain a price reduction while keeping the digital content or digital service, or end the contract and be refunded in full in exchange for giving up the digital content or digital service, if:
1° The trader refuses to bring the digital content or digital service into conformity;
2° Bringing the digital content or digital service into conformity is unjustifiably delayed;
3° The digital content or digital service cannot be brought into conformity without costs imposed on the consumer;
4° Bringing the digital content or digital service into conformity causes significant inconvenience to the consumer;
5° The lack of conformity persists despite the trader's unsuccessful attempt to bring it into conformity.
The consumer is also entitled to a price reduction or to terminate the contract when the lack of conformity is so serious that it justifies an immediate price reduction or termination. The consumer then does not have to ask first for the digital content or digital service to be brought into conformity.
Where the lack of conformity is minor, the consumer is only entitled to terminate the contract if the contract does not provide for payment of a price.
Any period during which the digital content or digital service is unavailable while it is being brought into conformity suspends the remaining guarantee period until conforming digital content or a conforming digital service is supplied again.
The rights above result from articles L. 224-25-1 to L. 224-25-31 of the French Consumer Code.
A trader who obstructs in bad faith the application of the legal guarantee of conformity is liable to a civil fine of up to 300,000 euros, which may be raised to 10% of average annual turnover (article L. 242-18-1 of the French Consumer Code).
The consumer also benefits from the legal guarantee against hidden defects under articles 1641 to 1649 of the French Civil Code, for two years from the discovery of the defect. This guarantee entitles the consumer to a price reduction if the digital content or digital service is kept, or to a full refund in exchange for giving it up.
10. Your content
You keep your rights on what you import, and you are free to use what Cortex generates for you. You confirm that you are allowed to use the documents you import for your own studies. Your content is only used to provide the service to you, as described in the privacy policy; no model is trained on it.
11. Prohibited use
The following are not allowed: sharing an account, automated extraction of content (scraping), working around the daily limits, and importing or generating content that is unlawful or that you have no right to use. In case of a breach, the publisher can suspend the account after warning you by e-mail, except in an emergency; if it happens again or the breach is serious, it can close the account.
12. Availability
Cortex runs on a single server, restarted automatically when it fails. Interruptions can happen, for maintenance or when a provider fails. They do not reduce your rights under the legal guarantee of conformity (section 9).
13. Liability
To the extent permitted by law, the publisher is not liable for indirect damage resulting from the use of Cortex, in particular from an incorrect answer, exercise or grade, which you remain responsible for checking. Nothing in these terms limits its liability for personal injury, gross negligence or wilful misconduct, nor the rights you have by law as a consumer, in particular the legal guarantee of conformity.
14. Ending the contract
You can stop using Cortex at any time, export your data and delete your account from My account, as described in the privacy policy. Deleting your account ends your Pro subscription (section 7).
15. Personal data
How your data is processed is described in the privacy policy.
16. Complaints and mediation
For any complaint, write first to abensur.benjamin@gmail.com or to the address in section 1.
If the dispute is not resolved, you can, as a consumer, refer it free of charge to a consumer mediator (articles L612-1 and following of the French Consumer Code). The publisher is in the process of joining a consumer mediation scheme; the name and contact details of the mediator will be given here once membership is effective, and are sent to you on request at abensur.benjamin@gmail.com. You can also bring the matter before the competent court.
17. Governing law and courts
These terms are governed by French law. If you are a consumer living in another country, you keep the protection of the mandatory provisions of the law of your country of residence. Failing an amicable solution or mediation, you can bring the matter, as you choose, before the court that has jurisdiction under the French Code of Civil Procedure or before the court of the place where you lived when the contract was concluded or when the damage occurred (article R631-3 of the French Consumer Code).
18. Changes to these terms
The version that applies to a purchase is the one you accepted for that purchase. A new version is shown to you, and must be accepted, before your next purchase. If it changes an ongoing subscription, you are told by e-mail at least one month before it applies, and you can cancel at no cost before then.
19. Language
These terms are written in French, the only binding version. This English translation is provided for convenience.
Appendix: model withdrawal form
(Complete and return this form only if you wish to withdraw from the contract.)
To Benjamin Abensur EI (Benabens), 8 rue du Général Ducrot, 67000 Strasbourg, France, abensur.benjamin@gmail.com:
I/We (*) hereby give notice that I/We (*) withdraw from my/our (*) contract of sale of the following goods (*)/for the provision of the following service (*):
Ordered on (*)/received on (*):
Name of consumer(s):
Address of consumer(s):
Signature of consumer(s) (only if this form is notified on paper):
Date:
(*) Delete as appropriate.