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Plain-language summary: YomiYomi does not show ads, sell personal data, or track you across other companies’ apps or websites. Study progress is stored on your device and synchronized to Supabase. Every learner—including a guest—receives a backend account ID. Apple or Google sign-in is optional. Daily reminders and widget data stay on the device.
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Effective date: August 26, 2026
Last updated: August 30, 2026
This policy uses “YomiYomi,” “we,” “us,” and “our” to refer to the operator of the YomiYomi service. For privacy questions or requests, use the official support channel shown within the app or on YomiYomi’s App Store listing.
This Privacy Policy explains how YomiYomi handles personal data when you use the YomiYomi iOS app, its home-screen widget, related authentication flows, and the backend services that synchronize your study progress. The related Terms of Use govern use of the service.
This policy does not govern third-party websites or services that you choose to open, including Apple, Google, Supabase, RevenueCat, or official JLPT websites. Their own privacy notices apply to their processing.
YomiYomi creates an anonymous Supabase account on first use so that core features, security controls, and synchronization can work without requiring your name or email. Supabase assigns:
A guest account is still a backend account, but it is not linked to your name or email unless you later choose Apple or Google sign-in.
If you link a guest account or sign in using Apple or Google, we receive: