Privacy Policy

Last updated: February 12, 2026

1. Introduction

Welcome to VocabDuel ("we," "our," or "us"), operated by Cascade Digital Labs, LLC. We are committed to protecting your personal information and your right to privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application VocabDuel and related services (collectively, the "Service").

By using our Service, you agree to the collection and use of information in accordance with this policy. If you do not agree with the terms of this Privacy Policy, please do not access the Service.

2. Interpretation and Definitions

Definitions

  • Account means a unique account created for you to access our Service.
  • Application means the VocabDuel software program provided by Cascade Digital Labs, LLC.
  • Company refers to Cascade Digital Labs, LLC.
  • Device means any device that can access the Service such as a phone, tablet, or computer.
  • Personal Data is any information that relates to an identified or identifiable individual.
  • Service refers to the Application and related websites.
  • Usage Data refers to data collected automatically through the use of the Service.

3. Information We Collect

Personal Data

While using our Service, we may ask you to provide us with certain personally identifiable information that can be used to contact or identify you. This may include:

  • Email address
  • Display name
  • Profile information (when signing in via Apple or Google)

Usage Data

Usage Data is collected automatically when using the Service. This may include:

  • Vocabulary learning progress and quiz performance
  • Challenge and duel history and results
  • Elo rating and competitive ranking data
  • Words studied, bookmarked, and mastered
  • App feature usage patterns
  • Device type and operating system version
  • Session duration and frequency of use

4. How We Use Your Information

We use the collected data for the following purposes:

  • To provide and maintain our Service
  • To manage your Account and provide access to Service functionality
  • To facilitate vocabulary challenges and duels between users
  • To send challenge invitations via email on your behalf
  • To calculate and maintain competitive rankings and leaderboards
  • To track your learning progress and provide personalized study recommendations
  • To send push notifications about challenges, results, streaks, and daily words
  • To process subscription payments and manage your subscription status
  • To contact you with updates, security alerts, and support messages
  • To improve our Service and develop new features

5. Data Storage and Security

Your data is stored securely using Amazon Web Services (AWS) infrastructure, including:

  • AWS Cognito for authentication and identity management
  • AWS DynamoDB for user data and learning progress
  • AWS S3 and CloudFront for audio content delivery
  • All data is encrypted in transit and at rest

While we strive to use commercially acceptable means to protect your Personal Data, no method of transmission over the Internet or electronic storage is 100% secure. We cannot guarantee absolute security.

6. Third-Party Services

We may use the following third-party services:

  • Apple Sign-In & Google Sign-In — for account authentication
  • Apple Push Notification service (APNs) — for delivering push notifications
  • AWS Simple Email Service (SES) — for sending challenge invitation emails
  • Amazon Polly — for generating word pronunciation audio

We do not sell, trade, or rent your personal information to third parties. We do not share your data with third-party advertisers.

7. Cookies and Tracking Technologies

Our mobile application does not use cookies. Our website may use the following types of cookies:

  • Essential Cookies — necessary for the website to function properly
  • Session Cookies — used to maintain your authenticated session
  • Functionality Cookies — used to remember your preferences

8. Children's Privacy

Our Service is not directed to anyone under the age of 13. We do not knowingly collect personally identifiable information from anyone under 13 years of age. If you are a parent or guardian and you are aware that your child has provided us with Personal Data, please contact us.

9. Your Data Rights

You have the following rights regarding your personal data:

  • Access — You can request a copy of your personal data
  • Correction — You can update or correct your personal information
  • Deletion — You can request deletion of your account and associated data
  • Opt-out — You can opt out of push notifications through your device settings

To exercise any of these rights, please contact us at [email protected].

10. GDPR Compliance (European Users)

If you are located in the European Economic Area (EEA), you have additional rights under the General Data Protection Regulation (GDPR), including the right to data portability and the right to lodge a complaint with a supervisory authority. Our legal basis for processing your data includes your consent, the performance of our contract with you, and our legitimate interests.

11. CCPA Compliance (California Users)

If you are a California resident, you have the right to know what personal information we collect, request deletion of your data, and opt out of the sale of personal information. We do not sell personal information.

12. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date. Changes are effective when posted on this page.

13. Contact Us

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