Privacy Policy

Last Updated: February 10, 2026

1. Introduction

This Privacy Policy ("Policy") describes how Snack Software and its affiliates ("Company," "we," "us," or "our") collect, use, disclose, and protect information obtained from users ("you" or "User") of the Deckiru application and related services (collectively, the "Service").

BY ACCESSING OR USING THE SERVICE, YOU ACKNOWLEDGE THAT YOU HAVE READ, UNDERSTOOD, AND AGREE TO BE BOUND BY THIS POLICY. IF YOU DO NOT AGREE, PLEASE DO NOT USE THE SERVICE.

2. Information We Collect

2.1 Information You Provide

  • Account Information: Email address, name, password (hashed), and profile image when you create an account.
  • User Content: Flashcard decks, cards, notes, tags, media files, and any other content you create or upload.
  • Study Data: Review history, ratings, performance metrics, and learning progress.
  • Communications: Information you provide when contacting us for support or feedback.

2.2 Information Collected Automatically

  • Device Information: Device type, operating system, browser type, and unique device identifiers.
  • Usage Data: Pages visited, features used, time spent, clicks, and navigation patterns.
  • Log Data: IP address, access times, and error logs for debugging and security purposes.
  • Cookies and Similar Technologies: Session cookies, local storage, and analytics tracking to improve user experience.

2.3 Third-Party Information

If you choose to authenticate via third-party providers (e.g., Google, GitHub), we receive limited profile information as authorized by you through those services.

3. AI-Powered Features

Our Service includes AI-powered flashcard generation. When you use this feature:

  • Your input prompts, text, or images are processed by third-party AI providers (Google Gemini) to generate content.
  • These providers may process and temporarily store your data according to their own privacy policies.
  • We do not control the AI provider's data practices and disclaim liability for their handling of your information.
  • AI-generated content may be inaccurate, incomplete, or contain errors. You are responsible for reviewing and verifying all generated content.

4. How We Use Your Information

  • To provide, maintain, and improve the Service.
  • To personalize your learning experience and optimize scheduling algorithms.
  • To process your requests and respond to inquiries.
  • To develop new features, products, and services.
  • To analyze usage patterns and conduct research for service improvement.
  • To enforce our Terms of Service and protect against fraud or security threats.
  • To comply with legal obligations and respond to lawful requests.
  • To send administrative notices, updates, and promotional communications (with your consent where required).

5. Information Sharing and Disclosure

We may share your information in the following circumstances:

  • Service Providers: Third-party vendors who assist in operating our Service (cloud hosting, analytics, AI processing, payment processing).
  • Legal Compliance: When required by law, regulation, legal process, or governmental request.
  • Safety and Security: To protect the rights, property, or safety of the Company, our users, or the public.
  • Business Transfers: In connection with any merger, acquisition, financing, or sale of company assets.
  • With Your Consent: When you explicitly consent to such sharing.
  • Public Content: If you choose to make decks or content public in the Library, that content may be visible to other users.
  • Aggregated Data: We may share anonymized, aggregated data that cannot reasonably identify you.

6. Data Storage and Security

Your data is stored on secure servers provided by reputable third-party cloud providers (including Neon for databases and Cloudflare R2 for media storage). We implement industry-standard technical and organizational security measures.

HOWEVER, NO METHOD OF TRANSMISSION OVER THE INTERNET OR ELECTRONIC STORAGE IS 100% SECURE. WE CANNOT GUARANTEE ABSOLUTE SECURITY OF YOUR DATA AND SHALL NOT BE LIABLE FOR ANY UNAUTHORIZED ACCESS, DISCLOSURE, OR LOSS.

7. Data Retention

We retain your information for as long as your account is active or as needed to provide the Service. We may retain certain data for legitimate business purposes, legal compliance, dispute resolution, and enforcement of our agreements, even after account deletion. Deleted decks may be retained in a soft-deleted state for recovery purposes and permanently purged according to our internal retention schedules.

8. Your Rights and Choices

Depending on your jurisdiction, you may have certain rights regarding your personal information, including:

  • Access to your personal data
  • Correction of inaccurate data
  • Deletion of your data (subject to legal retention requirements)
  • Data portability
  • Objection to certain processing activities
  • Withdrawal of consent where processing is consent-based

To exercise these rights, please contact us using the information provided below. We reserve the right to verify your identity before processing requests and may charge reasonable fees or decline requests that are excessive, repetitive, or manifestly unfounded.

9. Children's Privacy

The Service is not intended for children under 13 years of age (or the applicable age in your jurisdiction). We do not knowingly collect personal information from children. If you believe we have collected information from a child, please contact us immediately.

10. International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. These countries may have different data protection laws. By using the Service, you consent to such transfers. We take appropriate safeguards to ensure your data remains protected.

11. Third-Party Links and Services

The Service may contain links to third-party websites or services. We are not responsible for the privacy practices of such third parties. We encourage you to review their privacy policies before providing any information.

12. Changes to This Policy

We may update this Policy from time to time at our sole discretion. Changes will be effective when posted. Your continued use of the Service after any modifications constitutes acceptance of the updated Policy. We encourage you to review this page periodically.

13. Contact Us

If you have questions or concerns about this Privacy Policy, please contact us through our contact form.