Privacy Policy

1. Information We Collect

Account Information

When you sign up with Google, we receive:

• Your email address
• Your name (as provided by Google)
• Profile picture (if available)

Learning Data

To provide personalized tutoring, we store:

• Conversation transcripts from your tutoring sessions
• Learning progress and statistics (XP, streaks, session duration)
• Error patterns and corrections (to help you improve)
• Spaced repetition data (review schedules for your learning items)
• Language preferences and proficiency level

Voice Data

Your voice is processed in real-time and is not stored. Audio from your microphone is streamed to our speech recognition service, converted to text, and immediately discarded. We only retain the text transcripts, not audio recordings.

Payment Information

Payment processing is handled entirely by Stripe. We do not store your credit card numbers or banking details. We only receive confirmation of your subscription status.

Usage and Analytics Data

To understand how Cadentia is used and to diagnose problems, we collect product analytics through PostHog: the pages and features you visit, clicks and other interface interactions, and basic device and browser information. These events are tied to a pseudonymous account identifier (your user ID) along with non-identifying attributes such as your target language and account type. We do not send your email address or name to our analytics provider.

We also use session replay, which records a visual playback of your interactions with the interface (such as navigation, clicks, and on-screen content) to help us diagnose issues and improve usability. Text you type into form fields is masked and is not captured. This analytics data is processed by PostHog in the United States, is used only to operate and improve Cadentia, and is never sold. You can request its deletion at any time (see the section on Your Rights below).

2. How We Use Your Data

We use your information to:

• Provide and personalize your language learning experience
• Track your progress and schedule optimal review times
• Identify patterns in your errors to help you improve
• Maintain your account and subscription
• Send important service updates (we don't send marketing emails)
• Improve our AI tutoring system

3. Third-Party Services

We use trusted third-party services to operate Cadentia:

• Supabase — Database and authentication
• OpenAI — AI language model for tutoring conversations
• Deepgram — Speech-to-text transcription
• Azure — Text-to-speech for tutor voice
• LiveKit — Real-time audio streaming
• Stripe — Payment processing
• Google — OAuth authentication and text-to-speech
• Vercel — Website hosting
• PostHog — Product analytics and session replay (form inputs masked)

These services have their own privacy policies and handle data according to their terms.

4. Data Retention

We retain your data for as long as your account is active. If you delete your account, we will delete your personal data within 30 days, except where we're required to retain it for legal or business purposes.

5. Your Rights

You have the right to:

• Access your data — Request a copy of all data we have about you
• Delete your data — Request deletion of your account and all associated data
• Export your data — Download your learning history and progress
• Correct your data — Update inaccurate information

To exercise these rights, contact us at the email below.

6. Security

We implement industry-standard security measures to protect your data, including encryption in transit (HTTPS/TLS) and at rest. Access to user data is restricted to authorized personnel only.

7. Children's Privacy

Cadentia is not intended for users under 13 years of age. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal data, please contact us.

8. Changes to This Policy

We may update this privacy policy from time to time. We'll notify you of significant changes by email or through the app. Continued use after changes constitutes acceptance of the updated policy.

9. Contact Us

If you have questions about this privacy policy or want to exercise your data rights, contact us at:

Email: privacy@cadentialearning.com