Last updated: February 2026
Vosai ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our mobile application.
When you create an account, we collect your email address for authentication purposes.
When you use the lesson creation feature, you can take photos or select images from your library. These images are processed to extract vocabulary and are not stored on our servers after processing.
When you use speaking and pronunciation practice features, your voice is recorded and the resulting speech transcription is sent to Google LLC via the Gemini API for pronunciation evaluation and feedback. When you use the Conversation practice feature, your spoken messages are also sent to Google LLC via the Gemini API. This data is processed solely to provide feedback and is not permanently stored by Vosai.
We collect information about your learning progress, including:
This data is used to personalize your learning experience and track your progress.
We use the following third-party services:
We use Supabase for user authentication and data storage. Your account information and learning data are securely stored on Supabase servers. See Supabase Privacy Policy.
We use Google's Gemini AI (operated by Google LLC) to power the core features of Vosai. The following personal data is sent to Google's servers for processing:
Important information about AI processing:
By using Vosai's AI features, you acknowledge that the above data is transmitted to and processed by Google LLC.
For speaking practice, we use Apple's built-in speech recognition service on your device.
We implement appropriate security measures to protect your personal information. However, no method of transmission over the Internet is 100% secure, and we cannot guarantee absolute security.
We retain your personal information for as long as your account is active. You can request deletion of your account and associated data at any time by contacting us.
You must be 18 years of age or older to use Vosai. This requirement is due to our use of Google's Gemini AI API, which restricts usage to individuals 18 and older. We do not knowingly collect personal information from anyone under 18. If we learn that we have collected information from someone under 18, we will delete that information promptly.
You have the right to:
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.
If you have questions about this Privacy Policy, please contact us at:
Email: vosai.app@gmail.com