1. Acceptance of Terms

By accessing or using ChessMem ("the Service"), you agree to be bound by these Terms of Service. If you do not agree to these terms, please do not use the Service.

2. Description of Service

ChessMem is a chess opening trainer that helps users learn and memorise chess openings through spaced repetition practice. The Service is available via web browser and mobile applications.

3. User Accounts

To access certain features, you may need to create an account. You can sign in using any of the following providers:

• Apple ID (Sign in with Apple)
• Google account (Sign in with Google)
• Email address and password

You are responsible for:

• Maintaining the security of your account and password
• All activities that occur under your account
• Notifying us of any unauthorised use

4. Subscription Plans and Payments

ChessMem offers free and premium subscription options:

• Free: Limited to 5 practices per day, no charge.
• Monthly Premium: Unlimited practices and Premium features, billed monthly. The current price is shown in-app immediately before purchase. Pricing varies by region and may be adjusted from time to time; the price displayed at the time of purchase is the price you will be charged.
• Annual Premium: Unlimited practices and Premium features, billed yearly. The current price is shown in-app immediately before purchase. Pricing varies by region and may be adjusted from time to time; the price displayed at the time of purchase is the price you will be charged.

Payments are processed by Stripe (web purchases) or by the Apple App Store and Google Play Store (mobile app purchases). ChessMem does not directly handle your payment card details.

Auto-renewing subscriptions. Monthly and Annual Premium subscriptions are auto-renewable. This means:

• Your subscription will automatically renew at the end of each billing period (one month or one year) unless auto-renewal is turned off at least 24 hours before the end of the current period.
• Your payment method will be charged for the renewal within 24 hours prior to the end of the current period, at the then-current price for the plan you selected.
• The title of the subscription, the length of each billing period, and the price are displayed in-app immediately before purchase and, after purchase, on the App Store or Google Play subscription management screen.
• You can view, manage, and turn off auto-renewal at any time — see Section 7 (Cancellation) for the exact steps for web, iOS, and Android.
• No refund or credit is issued for the unused portion of any current billing period after auto-renewal, except where required by applicable law.

5. Legacy Lifetime Memberships

Lifetime memberships are no longer available for purchase. Existing lifetime members retain their access on the original terms.

"Lifetime" means the lifetime of the Service, not the lifetime of the subscriber. Lifetime access continues for as long as ChessMem continues to operate. We reserve the right to discontinue the Service at any time. In the event of discontinuation:

• No refunds will be issued for lifetime memberships
• We will provide reasonable notice where possible
• Access will continue until the Service closes

6. Refund Policy

• Monthly/Annual: Refunds available within 14 days of purchase if unused
• App Store purchases: Subject to Apple/Google refund policies

To request a refund, contact us at support@avdcltd.com

7. Cancellation

You may cancel your subscription at any time:

• Web subscriptions: Via your account settings
• App Store: Via iOS Settings > Apple ID > Subscriptions
• Google Play: Via Play Store > Subscriptions

Upon cancellation, you retain access until the end of your current billing period.

8. Acceptable Use

You agree not to:

• Share your account credentials with others
• Attempt to bypass usage limits or payment systems
• Reverse engineer or copy the Service
• Use the Service for any unlawful purpose

9. Intellectual Property

All content, design, and code of ChessMem is owned by us or our licensors. Chess opening data is compiled from public sources. You may not copy, modify, or distribute our proprietary content without permission.

10. Disclaimer of Warranties

The Service is provided "as is" without warranties of any kind. We do not guarantee:

• Uninterrupted or error-free operation
• That the Service will meet your specific requirements
• The accuracy of chess opening information

11. Limitation of Liability

To the maximum extent permitted by law, we shall not be liable for any indirect, incidental, special, or consequential damages arising from your use of the Service.

12. Changes to Terms

We may update these Terms from time to time. Continued use of the Service after changes constitutes acceptance of the new Terms. Material changes will be notified via email or in-app notification.

13. Governing Law

These Terms are governed by the laws of England and Wales. Any disputes shall be resolved in the courts of England and Wales.

14. Privacy and Data Protection

Your privacy is governed by our Privacy Policy, which forms part of these Terms by reference. The Privacy Policy explains:

• What personal data we collect and why (lawful bases under GDPR Article 6)
• Your rights under the UK GDPR and EU GDPR, including access, rectification, erasure, restriction, portability, and the right to lodge a complaint with the Information Commissioner's Office (ICO)
• How we transfer data internationally and the safeguards in place (GDPR Article 46)
• How long we retain data and how to delete your account

The data controller is AVDC Ltd, company number 14303849, registered in England and Wales. You can contact our data protection point of contact at support@avdcltd.com.

15. Apple App Store Additional Terms

The following terms apply only if you obtained ChessMem from the Apple App Store. They are in addition to the rest of these Terms.

• Parties. These Terms are between you and AVDC Ltd. Apple Inc. ("Apple") is not a party to these Terms and is not responsible for the App or its content.
• Licence scope. Apple grants you a limited, non-transferable licence to use the App on any Apple-branded device that you own or control, as permitted by the App Store Terms of Service.
• Maintenance and support. AVDC Ltd is solely responsible for any maintenance and support for the App. Apple has no obligation to provide maintenance or support.
• Warranty. In the event of any failure of the App to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price for the App to you (if any). To the maximum extent permitted by law, Apple has no other warranty obligation with respect to the App. AVDC Ltd, not Apple, is responsible for addressing any claims relating to the App.
• Product claims. AVDC Ltd, not Apple, is responsible for addressing any claims relating to the App or your use of it, including product liability claims, claims that the App fails to conform to any applicable legal or regulatory requirement, and claims arising under consumer protection or similar legislation.
• Intellectual property. In the event of any third-party claim that the App or your use of it infringes that third party's intellectual property rights, AVDC Ltd, not Apple, is solely responsible for the investigation, defence, settlement, and discharge of any such claim.
• Legal compliance. You represent and warrant that (i) you are not located in a country subject to a US Government embargo or designated as a "terrorist supporting" country, and (ii) you are not listed on any US Government list of prohibited or restricted parties.
• Third-party beneficiary. You acknowledge and agree that Apple and Apple's subsidiaries are third-party beneficiaries of these Terms, and that upon your acceptance of these Terms, Apple has the right (and is deemed to have accepted the right) to enforce these Terms against you as a third-party beneficiary.
• Refunds for App Store purchases. Refunds for in-app purchases or subscriptions bought through the App Store are handled by Apple under Apple's refund policy. AVDC Ltd does not process refunds for App Store transactions directly.

16. Contact

For questions about these Terms, contact us at:

Email: support@avdcltd.com

AVDC Ltd, Company No. 14303849, registered in England and Wales.

P1. Purchase Grant

All purchases are one-time payments granting access to the features and functionality available in the App at the time of purchase.

Your purchase grants a licence to use the App's current features. It does not grant ownership of the App or any intellectual property.

P2. No Obligation for Future Updates or Support

The App and all purchased features are provided "as is" and "as available."

Your purchase is for the App and features as they exist at the time of purchase only.

This purchase does not create any expectation of future development, feature additions, updates, maintenance, compatibility updates, or long-term product support.

The developer may, at their sole discretion, modify, update, suspend, or discontinue the App or any feature at any time, with or without notice.

P3. Feature Availability and Changes

Features, content, or functionality may be added, modified, limited, or removed at any time. Such changes do not entitle you to a refund except where required by applicable law.

P4. No Warranty

To the fullest extent permitted under applicable law, the App is provided without warranties of any kind, whether express or implied, including but not limited to:

• Merchantability
• Fitness for a particular purpose
• Reliability
• Availability
• Accuracy
• Compatibility with future systems

Use of the App is at your own risk.

P5. Limitation of Liability

To the maximum extent permitted by law, the developer shall not be liable for any indirect, incidental, special, or consequential damages, including but not limited to:

• Data loss
• Progress loss
• Device issues
• Incompatibility
• Interruption of use

Total liability for any claim shall not exceed the amount you paid for the App.

P6. Payments and Refunds

All payments are processed by third-party platform providers (such as Stripe, Apple App Store, or Google Play). Refund requests must be directed to the platform through which the purchase was made and are subject to that platform's policies.

The developer does not directly process or control payments or refunds.

P7. Account Responsibility

You are responsible for maintaining access to the account used for purchase. The developer is not responsible for lost access resulting from platform restrictions, account loss, or account termination.

P8. International Use

The App may be accessed worldwide. You are responsible for complying with the laws and regulations applicable in your jurisdiction.

P9. Changes to These Terms

These Terms may be updated from time to time. Continued use of the App after any updates constitutes acceptance of the revised Terms.

P10. Acceptance

By completing a purchase, you confirm that you:

• Have read these Terms
• Understand them
• Agree to be bound by them

If you do not agree, do not make a purchase.