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Privacy Policy

Last updated: September 2026

Key Points

  • We collect only the data needed to run the language-learning service.
  • We never sell your personal information.
  • You can request access, correction, export, or deletion at any time.
  • Voice and camera captures are processed for the request and are not stored.
  • We use industry-standard security and encryption in transit.

1. Introduction

Welcome to Vietnamy, a Vietnamese language-learning application operated by TECXMATE Corporation Ltd. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application and related services (the “Service”). By using the Service you agree to the practices described here.

2. What We Collect

  • Account information — name, email, profile picture, authentication credentials (via Firebase Auth), and sign-in provider (email, Google, Apple).
  • Learning data — lesson progress, quiz scores, streaks, preferred dialect, daily goals, review history.
  • Device & usage data — device model, OS version, app version, language, IP address, session duration, crash and diagnostic logs.
  • Payment data — subscription status and transaction identifiers returned by the App Store or Google Play. We never receive or store card numbers.
  • Communications — messages or feedback you send us directly.

3. Voice Recordings

The pronunciation coach and dictionary voice search capture short audio snippets from your microphone. Audio is sent to our speech-recognition processor to score pronunciation or transcribe a query, and is discarded after the response is returned. We do not use your voice recordings to train third-party models and we do not associate them with your account beyond the request that produced them.

4. Camera & Images

The dictionary camera search sends the captured frame to our OCR processor to extract text, then discards the image. Profile photos you upload are stored until you replace or delete them.

5. AI Tutor Conversations

The AI Tutor sends your typed or spoken messages to a large-language-model provider (currently OpenAI and/or Anthropic) to generate a response. Messages may be retained by the provider for up to 30 days for abuse monitoring under their standard terms, and are not used to train their base models. We retain conversation history in your account for up to 90 days so you can review past sessions; you can clear it at any time from Settings.

6. Legal Basis for Processing (EEA / UK users)

  • Contract — processing needed to provide the Service you signed up for.
  • Legitimate interests — analytics, service improvement, fraud prevention.
  • Consent — where you have given explicit consent, e.g. optional marketing communications.
  • Legal obligation — where required by applicable law.

7. How We Use Your Information

  • Provide, maintain, and improve the Service.
  • Personalize your learning path and recommendations.
  • Process transactions and manage subscriptions.
  • Send service-related communications.
  • Analyze usage to enhance features.
  • Detect, prevent, and address fraud, abuse, or technical problems.

8. Sharing Your Information

We do not sell your personal information. We share data only with:

  • Service providers bound by contractual obligations:
    • Firebase (Google) — authentication, analytics, crash reporting.
    • Zeabur — application hosting for the Vietnamy backend.
    • OpenAI and/or Anthropic — AI Tutor response generation.
    • Apple / Google — in-app purchase processing.
  • Legal requirements — when required by law or to protect rights and safety.
  • Business transfers — in connection with a merger, acquisition, or sale of assets, with notice to you.

9. International Data Transfers

Your information may be processed in countries other than your country of residence, including the United States and Singapore. We rely on Standard Contractual Clauses or equivalent safeguards where applicable.

10. Data Retention

We keep account data while your account is active. If you delete your account, we remove or anonymize your personal data within 30 days, except where longer retention is required by law (for example, tax records for invoices).

11. Security

We use TLS/SSL in transit, encryption at rest for account data, access controls, and regular security review. No system is perfectly secure; please use a strong, unique password and enable device-level protection.

12. Children’s Privacy

The 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 data, contact us and we will delete it.

13. Your Rights

Depending on where you live, you may have the right to:

  • Access — request a copy of the personal data we hold about you.
  • Correction — request correction of inaccurate data.
  • Deletion — request deletion of your personal data.
  • Portability — request a machine-readable copy of your data.
  • Objection / restriction — object to or restrict certain processing.
  • Withdraw consent — at any time, without affecting prior processing.

To exercise any right, email nguyenvanqui291@gmail.com or use the in-app Settings → Account → Delete Account flow.

14. Changes to This Policy

We will notify you of material changes via in-app notice or email at least 30 days before they take effect. Continued use of the Service after the effective date means you accept the updated policy.

15. Contact Us

TECXMATE Corporation Ltd. Villa Park Complex, Phu Huu Ward Ho Chi Minh City, Vietnam Email: nguyenvanqui291@gmail.com General support: nguyenvanqui291@gmail.com