Privacy Policy

LAST UPDATED: SEPTEMBER 2026 • LOCAL-FIRST PRIVACY STANDARD

1. Zero Personal Data Collection

TokyoFlow is built upon a local-first, privacy-respecting architectural foundation:

No Account Required: You do not need to register, provide an email, or link a third-party social account to use TokyoFlow.
On-Device Sandboxed Storage: Your study progress, weak-spot diagnostics, and saved audio cards are stored entirely in your local iPhone sandbox.
Zero Tracking: We do not track you across other applications, nor do we sell or broker user data with third parties.

2. Speech & Audio Processing

When you use speech shadowing or pronunciation verification features, acoustic processing is performed directly on your Apple device using native speech recognition APIs without transmitting recordings to cloud servers.

3. External Media & YouTube Links

TokyoFlow provides curated links to official video academy lessons hosted on YouTube. Interacting with these external embeds adheres to YouTube and Google Terms of Service and Privacy Policies.

4. Support & Contact

For inquiries regarding privacy practices or technical architecture, contact us at: support@tokyoflow.app