Privacy Policy for CardCalc

Last Updated: October 17, 2025

This Privacy Policy applies to the CardCalc mobile application (the "App") developed by Phuongnam Le (the "Developer"). CardCalc is provided as a freemium service and is intended for use "AS IS."

Information We Collect

CardCalc does not collect, store, or transmit any personal information.

All data you enter into the App (including calculations, saved entries, and settings) is stored locally on your device only. This information never leaves your device and is not accessible to the Developer.

What We DO NOT Collect:

Personal identification information (name, email, phone number)
Location data
Usage analytics or tracking data
Payment information
Device identifiers
Browsing history or app usage patterns

Subscription Information

CardCalc offers an optional Pro subscription through Apple's In-App Purchase system.

Important:

All subscription payments are processed entirely by Apple
The Developer does not have access to your payment information
Apple handles all billing, receipts, and transaction data according to Apple's Privacy Policy
Subscription management and cancellation are handled through your Apple ID settings

Data Storage

All data you create in CardCalc (calculations, saved entries, custom names, and percentages) is stored locally on your device using iOS's secure storage system. This data:

Remains on your device only
Is included in your device backups (iCloud or iTunes)
Is deleted when you uninstall the App
Is never transmitted to external servers

Third-Party Services

CardCalc does not integrate with any third-party analytics, advertising, or tracking services.

The only third-party service used is Apple's In-App Purchase system, which operates under Apple's own privacy policy.

Children's Privacy

CardCalc does not knowingly collect any information from children under the age of 13. The App does not require any personal information to use.

Parents and guardians should be aware that while the App itself does not collect data, subscription purchases must be made through an Apple ID, which requires users to be at least 13 years old (or have parental permission).

Data Security

Since CardCalc does not collect or transmit your personal information, your data security is primarily managed by:

iOS's built-in security features
Your device's passcode/biometric protection
Apple's encryption for device backups

Your Rights

You have complete control over your data:

Access: All your data is visible within the App
Delete: Uninstall the App to permanently remove all local data
Export: Currently, there is no export feature, but all data remains on your device
Opt-Out: Since we don't collect data, there's nothing to opt out of

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be reflected by updating the "Last Updated" date at the top of this policy. We encourage you to review this Privacy Policy periodically.

Continued use of the App after any modifications indicates your acceptance of the updated Privacy Policy.

Contact Us

If you have any questions or concerns about this Privacy Policy or CardCalc's privacy practices, please contact:

Email: phu@cardcalcapp.com

California Privacy Rights (CCPA)

Since CardCalc does not collect personal information, the California Consumer Privacy Act (CCPA) requirements regarding data collection, sale, and disclosure do not apply.

European Users (GDPR)

Since CardCalc does not collect or process personal data, GDPR requirements regarding data processing, storage, and transfer do not apply. All data remains locally on your device.