Privacy Policy for Archimedes' Ostomachion
Last updated: January 2026
Thank you for using 'Archimedes' Ostomachion'. We value your privacy and are committed to protecting it.
1. Payments and Data Collection
We offer two types of purchases within the App: Digital Content and Physical Goods. Each uses a different secure payment method.
a. Digital Content (In-App Purchases)
a. Digital Content (In-App Purchases)
Digital products (e.g., [Insert what your digital product is, e.g., "features, credits, unlocks"]) are processed exclusively through the Google Play Billing System.
- Data Collection: We do not collect or store any personal or financial information (such as credit card numbers or emails) for these transactions. All payment data is handled securely by Google.
- Data Usage: We only receive a unique "Purchase Token" to verify that your transaction was successful and to unlock your digital content.
b. Physical Goods (Stripe)
Physical products (e.g., [Insert what your physical product is, e.g., "merchandise, books"]) are processed through Stripe.
Data Collection: To fulfill your order, we collect the following personal information:
- Full Name
- Shipping Address
- Email Address (for order confirmation)
- Country Code & Postal Code (for order shipping)
Financial Data: Payments are processed through Stripe. Payment data (card numbers, etc.) is encrypted and processed directly by Stripe. You can read Stripe's privacy policy at stripe.com
Data Usage: This data is used solely for the processing, shipping, and technical support of your order.
- Data Collection: We do not collect or store any personal or financial information (such as credit card numbers or emails) for these transactions. All payment data is handled securely by Google.
- Data Usage: We only receive a unique "Purchase Token" to verify that your transaction was successful and to unlock your digital content.
Physical products (e.g., [Insert what your physical product is, e.g., "merchandise, books"]) are processed through Stripe.
Data Collection: To fulfill your order, we collect the following personal information:
- Full Name
- Shipping Address
- Email Address (for order confirmation)
- Country Code & Postal Code (for order shipping)
Financial Data: Payments are processed through Stripe. Payment data (card numbers, etc.) is encrypted and processed directly by Stripe. You can read Stripe's privacy policy at stripe.com
Data Usage: This data is used solely for the processing, shipping, and technical support of your order.
2. Children’s Privacy & Family Safety
Our Commitment to Quality Content
The content of this Application is designed to be family-friendly and appropriate for users of all ages. Our mission is to promote human thought and cultivate creativity in an incredibly constructive way. We believe our content is beneficial for intellectual development and safe for any age group.
Parental Guidance and Age Restrictions
While our content is universal, certain features of the App—such as the use of the camera, social sharing, and the ability to purchase digital content or physical goods—require a higher level of maturity and technical interaction.
Therefore, while the App is suitable for everyone, we strictly adhere to the following:
- Supervision: The use of this Application by children under the age of 13 (or 16 in the EU) must be conducted under adult supervision.
- No Intentional Data Collection: We do not knowingly collect personal information from children under the age of 13. Any data required for the fulfillment of physical orders (Stripe) or interactive features is intended to be provided by an adult or with an adult's explicit consent.
- Global Compliance: We are committed to complying with international standards, including COPPA (USA), GDPR (EU), and LGPD (Brazil) regarding the protection of minors and data privacy.
3. Internet Permission
The app requires an internet connection for the following specific purposes:
- In-App Purchases: To connect securely with the Google Play Billing system to process transactions and verify purchases.
- Secure Payments (Stripe): For the purchase of physical goods, your payment information is transmitted directly to Stripe via an encrypted connection (HTTPS).
- Order Notifications (Trigger Emails): When you complete a purchase or request support, we use Firebase/Google Cloud services to send automated "Trigger Emails" (e.g., order confirmations). For this purpose, your email address is processed securely to ensure delivery of these essential notifications.
- Note: No personal data or browsing history is transmitted or collected during these connections.
4. Internal Advertising Only
This app does not display third-party ads.However, it may include internal promotional content — such as messages or recommendations from the instructor or developer about:
- Related lessons
- Educational resources
- Upcoming content
5. Your Rights & Data Retention
a. Digital Content (In-App Purchases)
- All financial transactions are processed securely through the Google Play Billing System.We do not have access to, nor do we store, any credit card numbers or banking details.The app only receives a "purchase token" from Google to verify that a transaction was successful and to unlock the corresponding content.Users can restore their previous purchases at any time using the "Restore Purchases" feature, provided they are logged into the same Google Play account used for the initial purchase.
- Waiver of Withdrawal: By completing a digital purchase, you acknowledge and agree that the performance of the contract begins immediately and you expressly waive your right of withdrawal (Right to Refund).
- Google Play Refunds: Requests for refunds for digital products must be submitted directly through the Google Play Store according to their official refund policies.
b. Physical Goods (Stripe)
- We retain shipping information for as long as necessary to comply with tax and legal obligations.
- Return Period: You have the right to return physical products within [e.g., 14 days] of receipt, provided they are in their original, unused condition and packaging.
- Shipping Costs: Return shipping costs for physical goods are the responsibility of the customer, unless the item received was damaged or incorrect.
- Processing: Once the return is received and inspected, a refund will be issued to the original payment method via Stripe. Please allow [e.g., 5-10] business days for the credit to appear on your statement.
6. Camera and Media Access (Local Use)
To provide a personalized experience (e.g., creating custom "Ostomachion"), the app may request access to your device's camera or photo gallery.
- Strictly Local Processing: All image processing is done entirely on your device.
- No Storage or Uploads: We do not upload, store, or share your photos or camera data to any external servers or third parties.
- User Control: These permissions are used only when you choose to create a custom "Ostomachion" from your own images.
7. Third-Party Service Providers
To provide a personalized experience (e.g., creating custom "Ostomachion"), the app may request access to your device's camera or photo gallery.
- Google Play Services: For processing digital in-app purchases and verifying app integrity.
- Stripe: For secure credit card processing of physical goods.
- Firebase (Google): For app infrastructure and secure communication between the app and our payment processors.
8. Changes to This Policy
We may update this Privacy Policy in the future. Any changes will be posted in the app or on our official website
9. Terms & Conditions
10. Contact Us
If you have questions about this policy, please contact us:
of.the.mathematics@gmail.com
