Privacy Policy

Effective Date: 2026/2/15

JikuDeck is developed and operated by QPN Studio LLC ("we," "our," or "us"). This Privacy Policy explains how information is handled when you use the JikuDeck mobile application.

1. Overview

JikuDeck is designed with privacy in mind. The app does not require user accounts and does not collect personal content from your notes.

Most user-generated content remains stored locally on your device.

2. Information We Collect

A. User-Generated Content

All notes, cards, and content you create in JikuDeck are stored locally on your device. We do not access, transmit, or store your note content on our servers.

If you export content from the app, the exported file is generated locally on your device.

B. Analytics Data

We use Mixpanel to collect limited, anonymized usage analytics to help improve the app.

This may include:

• App usage events (e.g., feature interactions)
• Screen views
• App version
• Device type
• Operating system version
• General geographic region (country-level)

We do not collect:

• Note content
• Personal messages
• Email addresses
• Names
• Contacts
• Photos
• Precise location data
• Sensitive personal information

Mixpanel processes data in accordance with its own privacy policy.

C. Purchases

In-App Purchases are processed by Apple through the App Store. We do not receive or store your payment information.

Apple may provide us with anonymized purchase confirmation necessary to unlock app features.

D. Crash Reports

If enabled on your device, Apple may provide us with anonymized crash reports to help improve app stability. These reports do not include personal note content.

3. Data Storage

All user-generated content is stored locally on your device.

We do not operate a backend server that stores user notes or personal content.

If you delete the app, locally stored data may be removed unless backed up through Apple's system backup services.

4. Data Sharing

We do not sell, rent, or trade your personal information.

We may share limited analytics data with:

• Mixpanel (for usage analytics)

We may disclose information if required by law.

5. Third-Party Services

JikuDeck uses the following third-party services:

• Apple App Store (for purchases)
• Mixpanel (for analytics)

Each third party operates under its own privacy policy.

6. Children's Privacy

JikuDeck does not knowingly collect personal information from children under the age of 13.

Because the app does not require accounts or collect personal data, no age-based information is requested.

If you believe personal information has been inadvertently collected, please contact us.

7. Your Rights

Depending on your jurisdiction, you may have rights related to your personal information.

Since JikuDeck does not collect personal account data, most user content remains under your direct control on your device.

For questions or requests, contact us at:

support@jikudeck.com

8. Changes to This Policy

We may update this Privacy Policy from time to time.

Any changes will be reflected by updating the "Effective Date" above.

Continued use of the app after updates indicates acceptance of the revised policy.

9. Contact

If you have any questions about this Privacy Policy, please contact:

support@jikudeck.com

QPN Studio LLC