Privacy Policy

1. Introduction

At Sentino, we respect your privacy and are committed to protecting your personal data. This Privacy Policy explains how we collect, use, and safeguard your information when you use our Service.

2. Information We Collect

Account Information

When you create an account, we collect:

• Email address
• Name (if provided)
• Profile information from OAuth providers (Google)

Usage Data

We automatically collect:

• Dictionary entries you create
• Chat messages and text inputs
• Language preferences
• Feature usage patterns

Voice and Audio Data

When you use voice features (Speak and Pronunciation):

• Microphone audio is streamed in real time to Google Gemini for processing
• Audio is used solely to generate conversational responses and pronunciation feedback
• Voice audio is not permanently stored by Sentino

Technical Data

We may collect:

• Browser type and version
• Device information
• IP address

3. How We Use Your Information

We use your information to:

• Provide and maintain the Service
• Sync your dictionary across devices
• Process voice audio for real-time conversation and pronunciation feedback
• Improve and personalize your experience
• Process payments and manage subscriptions
• Communicate with you about the Service
• Ensure security and prevent abuse

4. Data Storage and Security

Your data is stored securely using Supabase, which provides enterprise-grade security measures. We implement appropriate technical and organizational measures to protect your personal data.

An account is required to use Sentino. Your dictionary data is synced to the cloud and also cached locally in your browser for offline access.

5. Third-Party Services

We use the following third-party services:

• Google OAuth - For authentication
• Google Gemini AI - For generating language learning content and real-time voice conversations
• Supabase - For data storage and authentication
• Paddle - For payment processing (web purchases)
• RevenueCat - For managing in-app purchases (iOS and Android)
• Google Tag Manager - For analytics

These services have their own privacy policies that govern their use of your data.

6. Data Retention

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

7. Your Rights

You have the right to:

• Access your personal data
• Correct inaccurate data
• Request deletion of your data
• Export your data
• Withdraw consent at any time

8. Cookies and Local Storage

We use cookies for authentication and session management. We also use browser local storage to save your dictionary data and preferences for offline access.

9. Children's Privacy

The Service is not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13.

10. Changes to This Policy

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

11. Contact Us

If you have questions about this Privacy Policy, please contact us at privacy@sentino.app.