Terms of Service

1. Operator and agreement

NumDojo is operated by Velislav Tihomirov Tsvetanov, a sole trader trading as NumDojo, 58 Beechley Road, Wrexham, LL13 7BA, United Kingdom. Contact support@numdojo.com. These terms govern use of the NumDojo website, learning service, and direct consumer subscriptions.

School and tutoring workspaces also require the School Data Terms. If an agreed school contract conflicts with these general terms, the signed school contract controls for that school service.

2. Age and account creation

• Public self-registration starts at age 13.
• A child under 13 must use a managed learner profile created by an authorised parent, guardian, or school.
• If the account holder is under 18, a parent or guardian should review these terms and be involved where law requires it.
• Only an adult account holder may start a paid subscription or access the billing portal. A cancellation request can still be made through account Settings or support.

You must provide accurate account information, keep credentials private, and tell us promptly if you believe an account is compromised. Do not share a classroom password. Schools must use individual temporary credentials or activation methods provided by the service.

3. Managed accounts and relationships

A learner can belong to a family workspace and a school workspace at the same time. A school's access is limited to the educational relationship, authorised classes, and permitted progress. Removing school membership does not automatically delete a family-managed account or independent learning history. A family or school may suspend access under its authority, while NumDojo may retain or anonymise records according to the Privacy Policy and applicable agreement.

4. Acceptable use and safety

You must not harass, threaten, exploit, groom, impersonate, scam, share unlawful or sexual content, expose another person's private information, manipulate rankings, evade safeguards, scrape the service, distribute malware, or interfere with service operation.

Free-text messaging is adult-only. Learner classroom communication uses live lesson state and supported announcements rather than private adult-to-child messages. Read the Community and Safety Rules for reporting, complaints, moderation, and appeals.

5. Free access and monthly Pro

Free access remains available. When checkout is available, the monthly Pro offer is for an independent UK account holder aged 18 or over. It costs £14.99 GBP each month, with no free trial or annual commitment. Checkout shows the complete inclusions and exclusions before you pay. Public ranked battles, tournaments, prizes, private rooms and managed-workspace plans are not included in this offer. A feature mentioned elsewhere on the site is not a promise that it is included or available.

First, save your payment method and confirm your UK billing address with Stripe. This step does not place an order, start a subscription or take payment. You then return to NumDojo to review the offer, correct any errors before paying and confirm payment separately. The final button says "Pay £14.99 and start monthly Pro". Payment is due then and at each monthly renewal until you cancel future renewal. The checkout language is English.

We accept your order when Stripe confirms the first successful payment for that subscription. Saving a payment method, a pending payment or a failed payment is not acceptance. We then verify payment and send your subscription confirmation. A later confirmation or access failure does not remove your refund rights. Keep your confirmation as a record of the version you accepted. These updated terms do not replace the terms of a previously accepted order without a valid agreed change.

6. Immediate access, cancellation, and refunds

Pro includes digital lesson and practice content and ongoing online features. Before payment, separate unticked controls ask you to agree to recurring payment, expressly request the online service to start early, and consent to immediate digital-content supply with acknowledgement that the statutory 14-day right to cancel that digital content ends when supply starts. That acknowledgement does not remove the online-service cancellation right, the full-refund promise below or remedies for faults.

We enable Pro only after payment verification, sending your subscription confirmation and completing the access checks. If payment succeeds but access does not start, contact support. You do not have to wait for access to request a refund.

Your statutory cancellation right

You can cancel the online-service contract without giving a reason during the 14 calendar days after the day we accept your order. The acceptance day is not counted. To cancel, send a clear statement to support@numdojo.com or to the supplier address in section 1. You may use the model form below, but you do not have to. Sending your notice before the cancellation period ends is enough; you do not have to wait for our reply.

If you cancel under this statutory right, we will reimburse all payments for the cancelled contract without unnecessary delay and no later than 14 calendar days after the day we receive your notice. We will use the same payment method unless you expressly agree otherwise, without a fee. We do not deduct a charge for service use during this cooling-off period.

Stopping renewal and our additional full-refund promise

You can stop future renewal on your billing page. Normal renewal cancellation takes effect at the end of the current paid period, so you keep paid access until then. Choosing only normal renewal cancellation does not itself request a refund.

For a new Pro subscription under these terms, you can instead cancel and ask for a full refund until 23:59:59 UK time (Europe/London) on the fourteenth calendar day after we first enable Pro on your account. We exclude that first day. Enablement means access is made available, not when you first use it. If you paid but Pro has never been enabled, you can ask for a full refund at any time before it is enabled.

Send your cancellation and refund notice to support@numdojo.com or the supplier address in section 1. Tell us you want to cancel and receive a refund. Your name and account email help us find the subscription. You do not need a reason or a particular form. Sending a clear notice before the deadline is enough, even if we reply later.

For a timely request, we will stop renewal and refund all payments collected for this subscription before your notice, plus any collected while we process cancellation. We will not deduct a charge for use or a processing fee. We will reimburse you without unnecessary delay and no later than 14 calendar days after the day we receive your notice, using the original payment method unless you expressly agree otherwise without a fee.

Your bank may take additional time to show the credit. We will confirm the amount and status and tell you if the payment provider needs further action. We do not count a pending or failed refund as completed. Cancellation under this promise ends Pro access, which may also be restricted while a refund or payment issue is being processed. Cancelling Pro does not by itself delete your NumDojo account.

Monthly renewal does not restart this additional refund window. Nothing here limits statutory cancellation rights or remedies for faulty, unavailable or misdescribed content or services, or other rights the law does not allow us to limit.

Model cancellation form

Complete and return this form only if you wish to cancel the contract. You may instead send any clear cancellation statement.

7. Managed and organisation services

Paid school, family, tutoring-organisation, and other managed-workspace plans are not part of the current public launch offer. NumDojo will not create a paid organisation service without a separate written agreement, an authorised adult customer, and any terms and data-protection documents required for that service. The presence of a workspace feature or policy page does not create an offer for sale.

8. Content and intellectual property

Mathematical methods themselves are not claimed as NumDojo property. NumDojo's software, lesson wording, problem sets, illustrations, branding, and presentation are owned by the operator or used under licence. You may use the service for personal or authorised classroom learning. You may not republish, sell, mass-copy, or build a competing dataset from protected content without permission.

9. Availability and learning outcomes

We work to keep NumDojo accurate and available, but do not promise uninterrupted service or a particular grade, speed, competition result, or educational outcome. We may fix content, change a feature, or temporarily suspend access for maintenance, security, legal, or safety reasons. Material paid-plan changes will receive an appropriate notice.

10. Enforcement, suspension, and appeals

We may remove content or restrict, suspend, or close an account where reasonably necessary for safety, security, unlawful conduct, serious or repeated rule breaches, non-payment, or legal obligations. Where appropriate, we will explain the reason and provide an appeal route. Emergency or evidence-preservation needs may require action before notice.

11. Liability

Nothing excludes or limits liability where doing so would be unlawful, including liability for death or personal injury caused by negligence, fraud, or mandatory consumer rights. Subject to that, NumDojo is not responsible for losses that were not reasonably foreseeable when the contract began, or for business losses arising from consumer use.

12. Governing law and disputes

These terms are governed by the law of England and Wales. If you are a consumer, you keep any mandatory protections and court rights provided by the law of the country where you live. Please contact support first so we can try to resolve the issue. This does not prevent either party from using a court or another legally available dispute route.

13. Changes

We may update these terms for legal, safety, security, or service changes. We will update the date and provide appropriate notice before a material change applies. An update does not silently rewrite the terms of an existing paid order. Any change to an accepted paid agreement must follow applicable law and any required agreement or cancellation rights.