Privacy Policy

Last Updated: January 23, 2026

Introduction

StudyDek ("we," "our," or "us") operates the website studydek.com (the "Service"). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service.

Information We Collect

Information You Provide

Account Information: When you create an account, we collect your email address, username, and display name.
OAuth Data: If you sign in with Google, we receive your name, email address, and profile picture from Google.
User Content: Flashcard decks you create, including card content and associated metadata.

Information Collected Automatically

Usage Data: We collect information about how you use the Service, including pages visited, features used, and study progress.
Device Information: Browser type, operating system, device type, and screen resolution.
Log Data: IP address, access times, and referring URLs.

Note: Our Practice section (studydek.com/practice) is designed for younger learners and does not use Google Analytics or Google Tag Manager. Only privacy-preserving, cookieless analytics (Vercel Analytics) may be used in this section. See "Children's Privacy" below for more details.

Cookies and Tracking Technologies

We use cookies and similar technologies to:

Keep you signed in
Remember your preferences (e.g., dark/light mode)
Analyze site usage (Google Analytics — excluding the Practice section)

How We Use Your Information

We use the information we collect to:

Provide and maintain the Service
Create and manage your account
Track your learning progress
Improve and optimize the Service
Communicate with you about updates or issues
Comply with legal obligations

Advertising

Current Status: StudyDek does not currently display advertisements.

Practice Section: The Practice section (studydek.com/practice) is designed for children and will not display personalized advertisements. If we introduce advertising to the Practice section in the future, we will either (a) implement age verification and obtain verifiable parental consent as required by COPPA, or (b) display only contextual, non-personalized advertisements that do not involve tracking or profiling.

Other Sections: If we introduce advertising to other sections of the Service in the future, we will update this Privacy Policy accordingly and provide notice to users.

Third-Party Services

Google Analytics

We use Google Analytics to understand how visitors use our site. Google Analytics collects information such as how often users visit the site, what pages they visit, and what other sites they used prior to coming to our site.

Important: Google Analytics is not used on our Practice section (studydek.com/practice) to protect the privacy of younger users.

You can opt out of Google Analytics by installing the Google Analytics Opt-out Browser Add-on.

Vercel Analytics

We use Vercel Analytics, a privacy-focused analytics service that does not use cookies and does not collect personal information. This service may be used across all sections of the site, including Practice.

Supabase

We use Supabase to store your account information and user content. Supabase's privacy practices are described in their Privacy Policy.

Vercel Hosting

Our Service is hosted on Vercel. Vercel may collect technical information about your visits. See Vercel's Privacy Policy for more information.

Data Retention

We retain your personal information for as long as your account is active or as needed to provide you the Service. You may request deletion of your account and associated data at any time.

Deletion Requests: We will respond to deletion requests within 30 days. Upon deletion, we will remove your personal information from our active databases. Some information may be retained in backups for a limited period or as required by law.

Guest Users: If you use the Service without an account, your study progress is stored only in your browser's local storage and is not transmitted to our servers.

Data Security

We implement appropriate technical and organizational measures to protect your personal information, including encryption in transit (HTTPS) and at rest. However, no method of transmission over the Internet or electronic storage is 100% secure.

Children's Privacy

Our Commitment

StudyDek provides educational content for learners of all ages, including children under 13. We are committed to protecting children's privacy and complying with the Children's Online Privacy Protection Act (COPPA).

Practice Section — Special Protections for Young Learners

Our Practice section (studydek.com/practice) is specifically designed for younger learners, including children under 13. To protect their privacy:

No behavioral tracking: We do not use Google Analytics, Google Tag Manager, or similar tracking technologies in the Practice section.
No personalized advertising: The Practice section does not and will not display personalized advertisements.
No account required: Children can use the Practice section without creating an account. Study progress is stored locally in the browser and is not transmitted to our servers.
Cookieless analytics only: We may use Vercel Analytics, which does not use cookies or collect personal information, to understand general usage patterns.

Account Creation

When users create accounts, we do not knowingly collect personal information from children under 13 without verifiable parental consent. If you are a parent or guardian and believe your child under 13 has created an account or provided personal information without your consent, please contact us immediately at privacy@studydek.com. We will promptly delete such information.

Parental Rights

Parents and guardians have the right to:

Review the personal information we have collected from their child
Request deletion of their child's personal information
Refuse to permit further collection or use of their child's information

To exercise these rights, please contact us at privacy@studydek.com with sufficient information to verify your identity and relationship to the child.

Your Rights

Depending on your location, you may have the right to:

Access the personal information we hold about you
Request correction of inaccurate information
Request deletion of your information
Object to or restrict certain processing
Data portability

To exercise these rights, please contact us at privacy@studydek.com. We will respond within 30 days.

California Residents (CCPA/CPRA)

California residents have the right to:

Know what personal information is collected and how it is used
Request deletion of personal information
Opt out of the sale or sharing of personal information
Non-discrimination for exercising privacy rights

We do not sell or share personal information as defined by California law.

European Users (GDPR)

If you are in the European Economic Area, you have rights under the GDPR including access, rectification, erasure, restriction, portability, and objection. Our legal bases for processing are:

Consent: For optional features and analytics (where applicable)
Contract: To provide the Service when you create an account
Legitimate Interests: To improve and secure the Service

You may withdraw consent at any time by contacting us or adjusting your browser settings.

International Data Transfers

Your information may be transferred to and processed in the United States, where our servers are located. By using the Service, you consent to this transfer. We ensure appropriate safeguards are in place for international transfers as required by applicable law.

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of material changes by:

Posting the new Privacy Policy on this page
Updating the "Last Updated" date
For material changes affecting children's privacy, providing prominent notice on the Service

Your continued use of the Service after changes constitutes acceptance of the modified Privacy Policy.

Contact Us

If you have questions about this Privacy Policy or wish to exercise your privacy rights, please contact us at: privacy@studydek.com

For concerns specifically about children's privacy, please include "COPPA" in your subject line for priority handling.