Privacy Policy
mimi (mimichan.app and the mimi iOS app) is a JLPT exam practice tool. This policy explains what data we collect, why, and how you stay in control of it.
Data we collect
- Account — when you sign in with Google or Apple: your email address (which may be a private relay address created by Apple), display name, profile picture (Google) and the account identifier issued by Google/Apple.
- Study data — exams, answers, scores, flashcards and review schedule, study path, streaks and settings (level, target exam, time zone).
- Pledges — the name and text you enter when creating a pledge, plus the "witness" taps from people you share the link with.
- Before you sign in — a random guest ID stored in a cookie to keep your work on this device (expires after 180 days of inactivity).
- Usage analytics — Google Analytics 4 records events such as page views and starting or submitting an exam, with a random device ID (cookie) and an approximate country/city-level location derived from your IP address. This data is not linked to your account. Google Signals and ad personalization are turned off.
- Content reports — the reason you choose when reporting a pledge.
- On your device — browser/app storage keeps unfinished exams, light/dark theme, language and chosen level.
We do not collect contacts, photos, precise location, health data or payment information.
How we use data
- To score exams, save results, create review cards from mistakes and sync across your devices.
- To understand which features help so we can improve the product (aggregate statistics).
- To keep the service safe: rate limits and handling content reports.
We do not sell data, we show no ads, and we do not track you across other companies' apps or websites.
Third parties that process data
- Google — Google sign-in and Google Analytics.
- Apple — Sign in with Apple.
- Google Cloud — servers and database.
- Cloudflare — content delivery and attack protection.
Voluntary donations go through a bank or an external service; mimi does not receive or store payment details.
Retention and deletion
Account data is kept until you delete your account. You can delete it at any time under Me → Delete account: the account and all exams, flashcards, study paths and pledges are deleted immediately, and Sign in with Apple access is revoked. Guest data expires automatically after 180 days of inactivity.
Children
mimi is not intended for children under 13 and does not knowingly collect data from children under 13.
Your rights
You can view, correct or delete your data. Most actions are available on the Me page; for anything else, contact us.
Privacy contact: [email protected]
Changes
When this policy changes, the "Updated" date at the top changes too. Significant changes will be announced in the app.