Does the app record my voice constantly?

No. The microphone API is only activated when you actively click the record button to capture a pronunciation attempt. The recording process terminates automatically when you release the button or when the phrase duration limit is reached.

Are my voice recordings stored on a remote server?

During early waitlist pre-launch testing, voice recordings are processed and may be stored on our secure servers for debugging and reference baseline calibration ONLY if you provide explicit, active opt-in consent. If you choose not to opt-in, your voice data is processed locally or deleted immediately after calibration feedback is generated.

Voice Recording & Data Privacy Policy

Trust Statement

Your voice is yours alone.

Calibrating pitch contours requires capture of microphone signals. We believe in providing absolute visibility into how these recording inputs are used.

1. Microphone Permission Bounds

The application uses the browser's `navigator.mediaDevices.getUserMedia` microphone API. We **only** access the microphone when you actively tap the 'Record' button to speak a practice phrase. There is no passive, hidden, or background listening enabled.

2. How Voice Telemetry is Handled

When a voice sample is recorded, the fundamental sound frequencies are parsed by our digital signal processing (DSP) logic to calculate the pitch contour shape. How we handle the resulting audio file depends on your choice:

Standard Local Processing: By default, your speech pitch is extracted locally or sent to our secure calibration processor, generating immediate visual overlays, and the raw recording is instantly discarded.
Early Tester Telemetry (Opt-in): During early pre-launch testing, you may optionally opt-in to help improve the calibration models. If and only if you provide active consent, voice samples are securely stored for telemetry analysis and baseline tuning.

3. Third-Party Audits & Storage Boundaries

No voice recordings are shared with third-party advertising companies, grammar platforms, or data brokers. All data is processed using modern encryption protocols, and waitlist signups are isolated within highly secure database partitions.

4. User Control & Data Deletion

You have the absolute right to delete any stored data. If you have participated in early testing and want your historical voice records or waitlist email purged, you can contact us at any time, and we will perform a hard delete across all storage volumes within 30 days.

Early Access

Join the secure tester waitlist.

We are building and validating Đúng Chưa? alongside early testers. Join the pre-launch waitlist to receive updates when testing spots open.

Voice recording is strictly used to evaluate spoken pitch shapes. Early waitlist iterations will store voice samples for telemetry, algorithm debugging, and reference baseline calibration only with clear consent.

You're on the list!

We'll reach out when early testing opens. Want to help us shape the initial practice deck? Tell us a bit about your struggles: