Privacy Policy
Last updated: 7 September 2026
1. Who is responsible
SIA EzW (reg. no. 40203768822), registered in Latvia, is the data controller for personal data processed through Card Mastery. Contact: info@cardmasteryapp.com.
2. What data we collect
Account data: your email address, used to create and access your account.
Usage data: your practice session statistics and settings, stored so you can track your progress.
Payment data: when you purchase a paid plan, our payment provider (Stripe) processes your payment. We receive limited information such as your subscription status and a customer identifier. We do not store your card details.
Local settings: preferences such as language and theme are stored in your browser and are not sent to us.
3. How we use your data
To provide and maintain the Service, to manage your account and subscription, to save your progress, and to respond to your requests. We do not sell your personal data.
4. Legal basis (EU/EEA users)
We process your data to perform our contract with you (providing the Service), to comply with legal obligations, and on the basis of your consent where applicable.
5. Third parties
We use trusted service providers to operate the Service, including hosting and database infrastructure and our payment provider. These providers process data on our behalf and are bound by their own data protection obligations.
6. Data retention
We keep your data for as long as your account is active. You may request deletion of your account and associated data at any time by contacting info@cardmasteryapp.com.
7. Your rights
Depending on your location, you may have the right to access, correct, delete, or export your personal data, and to object to or restrict certain processing. To exercise these rights, contact info@cardmasteryapp.com. EU/EEA users may also lodge a complaint with their local data protection authority.
8. Security
We take reasonable technical and organisational measures to protect your data. No method of transmission or storage is completely secure, and we cannot guarantee absolute security.
9. Changes
We may update this Privacy Policy. Material changes will be reflected by updating the date above.
10. Contact
Privacy questions or requests: info@cardmasteryapp.com.