Logica Privacy Policy

Effective date: June 14, 2026　/　Provider: NullPo Works

This Privacy Policy explains how NullPo Works ("we") handles information in the logic-learning app "Logica" (the "App").

1. Overview

The App does not collect information that personally identifies you (such as your name, email address, or account). No sign-up is required, and your learning data is stored on your device. For in-app purchases and crash analysis, the third-party services described below process limited data.

2. Data stored on your device (not transmitted)

Your learning progress, settings (language, font size, theme, etc.), and purchase status are stored only on your device (local storage) and are not sent to our servers. You can export and restore this data yourself from "Settings > Data Backup," and erase it via "Reset Progress" or by uninstalling the App.

3. In-app purchase data (RevenueCat / App Store, Google Play)

Purchasing and restoring premium features uses the purchase-management service RevenueCat and the app stores (Apple App Store / Google Play). At purchase, transaction/receipt information, an anonymous identifier used to recognize the purchase, technical device/SDK information, and the incidental IP address are processed by RevenueCat.

  • Purpose: validating purchases, restoring purchases, and managing your premium entitlement.
  • We do not obtain your name, email, or similar personal information in this process (purchases are tied to an anonymous ID and your store account).
  • This data is not used for advertising and is not sold to third parties.

4. Crash and diagnostic data (Sentry)

To find and fix problems in the App, when the App crashes or errors, diagnostic information is sent to the crash-analysis service Sentry. The information is limited to technical data such as the error (stack trace), OS and device model, app version, and a summary of the actions leading up to the error.

  • We operate it configured not to send personally identifying information (PII), and IP address storage is disabled.
  • Purpose: investigating and fixing bugs only. Not used for advertising, not sold.

5. What we do not collect

The App displays no ads and does not collect identifiers for tracking or analytics. We do not access your location, contacts, photos, or your device's Advertising ID.

6. Third-party services

The App uses the following third-party services; their handling of data follows their own privacy policies.

7. Data retention and deletion

You can delete on-device data at any time (reset / uninstall). Data held by RevenueCat and Sentry is retained according to their respective policies. Contact us and we will help where possible.

8. Children's privacy

We do not knowingly collect personal information from children. As noted above, the App does not collect personally identifying information in the first place.

9. Contact

For questions about this policy, please use the NullPo Works contact page.

10. Changes

We may update this policy in response to legal or service changes. We will announce significant changes on this page.