Privacy Policy
Effective date: August 1, 2026
1. Introduction
Chesstrophy is a chess training web app that helps you study openings, practice courses, use drills and explorer features, and personalize your training.
This Privacy Policy explains what information we collect, how we use it, who we share it with, how long we keep it, and the choices you have.
2. Information We Collect
We may collect:
- Account information provided through Google sign-in, including your name, email address, Google account identifier, and profile picture.
- Your Chess.com or Lichess username, if you choose to connect one.
- Public game information associated with your username, if you choose to import games during onboarding.
- Your training progress, saved preferences, subscription status, and information you provide when contacting support.
- Usage and device information collected through analytics tools, where enabled.
3. How We Use Information
We use your information to:
- Sign you in and manage your account.
- Provide Chesstrophy’s training, course, drill, and explorer features.
- Personalize your training based on your optional game imports and activity.
- Process subscriptions and manage billing.
- Protect the service, prevent misuse, and provide support.
- Understand how Chesstrophy is used and improve it.
4. Legal Bases
Where privacy laws require a legal basis, we rely on:
- Account, authentication, and service delivery: performance of a contract with you or steps you ask us to take before entering one.
- Security, support, and service improvement: our legitimate interests in operating and improving Chesstrophy.
- Optional public game imports: your consent or the steps you ask us to take when you choose to connect a Chess.com or Lichess username.
- Analytics and cookies where required: your consent.
- Billing and required records: legal obligations and, where applicable, performance of a contract.
5. Cookies and Analytics
Chesstrophy may use cookies and analytics tools, such as Google Analytics or similar providers, to understand product usage and improve the service.
For users in the EU and UK, where required, we will request consent before enabling non-essential analytics or cookies. This Privacy Policy does not replace a cookie-consent mechanism.
6. Game Imports
You may optionally connect your own Chess.com or Lichess username during onboarding. If you do, Chesstrophy may import recent public games associated with your username to help personalize your training.
Game imports are a user choice. You do not have to connect a username or import games to use Chesstrophy, and you can skip this feature. The onboarding import request is intended to be completed only once per account.
You should only submit your own Chess.com or Lichess username. You can contact us to request deletion of imported game data associated with your account.
7. Payments
Payments and subscriptions are handled by Stripe. Chesstrophy does not receive or store your full payment card details. Stripe handles payment information under its own privacy policy.
8. No Sale of Personal Data
Chesstrophy does not sell your personal data.
9. When We Share Information
We may share information with trusted service providers that help us operate Chesstrophy, including:
- Google, for sign-in.
- Stripe, for payments and subscriptions.
- Chess.com and Lichess, when you choose to connect your username or import public games.
- Analytics providers.
- Hosting and other service providers needed to operate and support Chesstrophy.
We may also share information if required by law, to protect our rights or users, or as part of a business transfer such as a merger or acquisition.
Service providers may process information only as needed to provide their services to Chesstrophy.
10. International Transfers
Your information may be processed by service providers located in countries other than your own. Where required, Chesstrophy uses appropriate safeguards for international data transfers.
11. How Long We Keep Information
We keep information only as long as needed to provide Chesstrophy, meet legal obligations, resolve disputes, enforce agreements, and protect the service.
In practice:
- Account information is kept while your account is active.
- Training progress and imported game data are kept while they are useful to provide your training experience, unless you ask us to delete them.
- Billing and subscription records may be kept as required for tax, accounting, fraud prevention, and legal compliance.
- Analytics information is kept according to the retention settings of the analytics provider.
12. Your Rights and Choices
Depending on where you live, you may have the right to:
- Access your personal information.
- Correct inaccurate information.
- Export your information.
- Request deletion of your information.
- Object to or request restriction of certain processing.
- Withdraw consent where processing is based on consent.
To make a request, contact us using the email below.
You may also choose not to import public games, skip the one-time onboarding game import, or withdraw analytics consent where a consent control is available.
13. Security
We use reasonable measures to protect your information. However, no online service can guarantee complete security.
14. Children
Chesstrophy is not intended for children under 13, or under the minimum age required in your country to use the service. We do not knowingly collect personal information from children who are not permitted to use Chesstrophy.
15. Changes
We may update this Privacy Policy from time to time. If we make material changes, we will update the effective date and provide notice where required.
16. Contact
For privacy questions or requests, contact: