Effective Date: June 21, 2026
AI Lingo Chat ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our website (ailingo.chat), Android app, iOS app, and related services (collectively, the "Service").
Account Information: When you register, we collect your email address, display name, and encrypted password. If you use Google Sign-In, we receive your Google profile information (name, email).
Learning Data: We store your lesson progress, quiz scores, pronunciation recordings (transient — deleted after analysis), flashcard ratings, XP, streaks, and tone assessment results to personalize your learning experience.
Usage Data: We collect anonymous analytics including pages visited, features used, session duration, and device type to improve our Service.
Audio Recordings: When you use pronunciation practice or speaking features, audio is transmitted to our servers for speech-to-text transcription and pronunciation scoring. Audio recordings are processed transiently and are not permanently stored.
We do not sell your personal data. We share data with third parties only as necessary to provide the Service:
| Service | Purpose | Data Shared | Retention |
|---|---|---|---|
| Deepgram (deepgram.com) | Speech-to-text transcription | Audio recordings | Transient (deleted after processing) |
| Faster-Whisper (open source) | On-device or server-side STT | Audio recordings | Transient (deleted after processing) |
| DeepSeek AI (deepseek.com) | Pronunciation analysis, daily content generation, AI conversation | Transcribed text (not audio), learning context | Transient (API-only, not stored) |
| Google Sign-In | Optional authentication | Google profile name and email | Per Google's privacy policy |
| Google Analytics | Anonymous usage analytics | Pages visited, session duration, device type (anonymized) | 26 months |
| Category | Data Fields | Required? |
|---|---|---|
| Account | Email, display name, encrypted password | Yes |
| Learning Progress | Lesson completion, quiz scores, XP, streaks, flashcard ratings, pronunciation scores, tone assessments | Yes (core function) |
| Audio | Voice recordings for pronunciation practice and conversation | Only when using speech features |
| Usage | Pages visited, features used, session duration, device type, app version | Automatic (anonymous) |
| Google Profile | Name, email (if using Google Sign-In) | Optional |
We use essential cookies for authentication (JWT token storage) and session management. Google Analytics uses cookies for anonymous analytics. You can disable non-essential cookies in your browser settings.
Your data is stored on secure servers with encryption at rest and in transit (TLS 1.3). We retain your learning data as long as your account is active. Audio recordings are processed transiently and never stored permanently on our servers. You may request deletion of your data at any time by contacting us. Deletion requests are processed within 30 days.
Our Service is not directed to children under 13. 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 immediately.
In the event of a data breach affecting your personal information, we will notify affected users via email within 72 hours of discovery, as required by applicable law.
We may update this Privacy Policy from time to time. Material changes will be communicated via email or in-app notification at least 30 days before taking effect.
For privacy-related inquiries, data requests, or to exercise your rights:
Email: contact@ailingo.chat
Response time: Within 30 days
Data Controller: AI Lingo Chat
Jurisdiction: United States