Privacy Policy

• A device/session identifier used to save your learning progress across visits.
• Your learning activity — vocabulary reviews, practice answers, scores, streaks and settings.
• Audio you record for pronunciation/speaking practice. It is processed to score your speech and is transient — we do not build a long-term library of your recordings.
• If you create an account: your phone number or email used to sign in. We never store full card numbers.
• Basic technical data (IP address, browser type) for security and abuse prevention.

We use essential cookies (your session and language preference) and analytics cookies to understand usage.

We may show ads via Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits. You can opt out of personalized advertising by visiting Google Ads Settings, or opt out of third-party cookies at aboutads.info. See also Google's advertising policies.

• Google AdSense and Google Analytics — advertising and usage analytics.
• Speech-processing providers — for speech scoring and pronunciation audio, only when those optional features are enabled. By default, pronunciation and listening audio is generated on your own device.
• AI providers — automated grading of your writing and speaking submissions.
• Payment processing (VietQR bank transfer) — to handle purchases. The bank-transfer relay receives the transaction data needed to process your payment.

These providers process data on our behalf under their own privacy policies.