Privacy

Updated September 25, 2026. This page covers the site jiyomi.app and the Jiyomi app (Android and iPhone).

In short

• The dictionary works without an account, cookies, ads or trackers.
• The app reads your pages on your phone: the photo never leaves the device, unless you ask the AI to reread it.
• We keep only what three things need: the app’s mailing list, AI help, and subscriptions. Nothing is sold.

Who is responsible

Dorian Souc, who publishes Jiyomi. For any question or request: contact@jiyomi.app.

On the site

• What you search for is not recorded anywhere on our side. Like any host, Cloudflare sees your IP address while serving the page.
• The theme and recent words are kept in your browser (local storage), never sent. The ✕ next to recent words clears them.
• Fonts come from Google Fonts: your browser asks Google for them, so Google sees your IP address.
• The app’s mailing list (home page and “The Android app” page): if you leave your address and tick the box, we keep the address, the date and the phone you chose (Android or iPhone). It is used to tell you about new versions and about Jiyomi arriving on the stores, and, if you give your Google account address, to invite you to the Play Store test (we then give it to Google Play for that). We keep it until you unsubscribe: every e-mail has a link to do so. To limit bulk sign-ups, we keep a hashed fingerprint of your IP address, for the day only.

In the app

• Reading, furigana and the dictionary run on the phone, offline. Your photos, decks and cards stay on the phone.
• Downloads (dictionary, updates) come from GitHub, which sees your IP address.
• An anonymous account is created the first time the app talks to our server: a random identifier, your plan and the glyphs used this month. The token that protects it is stored only as a fingerprint. To limit abuse, we keep a fingerprint of your IP address on the day of creation, for the day only. We also note the last day the app was opened, and a plain daily count of openings with nothing that identifies you: that is how we know how many people use the app.
• AI help (translate, explain, reread): when you ask for it, the sentence, with the two sentences before and the two after — or, for a reread, the photo strip of the sentence or the photo of the page — go through our server to Anthropic, which runs the AI (Claude). We keep the answer, so the same request is not paid for twice, a fingerprint of the request and its cost. An image is never kept, only its fingerprint. If another account sends exactly the same request, it may receive the same answer: nobody can look up other people’s requests. See also Anthropic’s privacy policy.
• Signing in with Apple or Google is optional. We keep only the identifier the provider gives your account: neither your name nor your e-mail address.
• Subscriptions are paid through the App Store or Google Play: we never see your card. RevenueCat, which tracks subscriptions for us, receives your account identifier and the subscription status; we keep the plan and its end date.
• Reports and ideas you send us (Settings → Report · suggest, or “Report” on a word): your text, the sentence or word concerned, the app version and the phone type. They are stored in a private space (on GitHub) to be read. Nothing leaves without that tap.
• Your last 5 photos, only if you agree: the app asks once, box unticked by default. They stay on your phone and only leave if you tick “attach my last pages” when sending a report. Settings → “Keep my last 5 photos”: OFF erases them.
• Deleting your account: Settings → Account → Delete my account. Your account, sign-ins, kept answers and reports not yet collected are erased. Costs already paid stay in our totals, with no link to you any more.

Who else processes this data

• Cloudflare (USA): hosts the site, the server and its database.
• Anthropic (USA): the AI behind AI help, when you ask for it.
• Google: the site’s fonts; Google sign-in and Google Play in the app.
• Apple: Apple sign-in and the App Store.
• RevenueCat (USA): subscription tracking.
• GitHub (USA): downloads, and the private space where reports are stored.

When data leaves the European Union, it does so under a framework provided by the GDPR (Data Privacy Framework or standard contractual clauses).

Legal basis

The mailing list, reports and kept photos rest on your consent (the box, the button), which you can withdraw at any time. The account, AI help and subscriptions rest on what is needed to provide the service you ask for. IP fingerprints rest on our legitimate interest in preventing abuse.

Your rights

You can ask to see, correct, take away or erase your data, and object to its use: write to contact@jiyomi.app. You can also complain to your data protection authority — in France, the CNIL.

Minors

The mailing list, sign-in and subscriptions are for people aged 15 and over, or with a parent’s consent.