KanjiMate Privacy Policy
This Privacy Policy explains what KanjiMate does with information when you use it on your iPhone or iPad. The short version: your study data stays on your device and in your own iCloud account, and we receive none of it.
Scope
This policy applies to the KanjiMate app for iPhone and iPad, distributed on the App Store, together with its widgets, and to the pages under leafworkstudio.com that support it. It describes version 1.3.0 and later.
By using KanjiMate, you agree to the handling of information described in this policy.
What Stays on Your Device
Your cards and review history, favorites, notes and stories, tags and groups, Practice Writing records, study history and streak, Deck Settings, recent searches and app preferences are stored on your device, inside the app's own storage. The widgets read the same data on the device.
KanjiMate has no account. You do not create one, and there is nothing to sign in to.
iCloud Sync
KanjiMate syncs your study data through Apple's CloudKit, in the private database of your own iCloud account. That covers your cards and review history, favorites, notes and stories, tags and groups, Practice Writing records, study history, Deck Settings and recent searches. Appearance, Keep screen on and the daily reminder stay on each device.
A small amount of information is kept in iCloud's key-value storage instead: whether you have finished the app's introduction, and which achievement levels the app has already celebrated, so that reinstalling does not show them again.
Data in your iCloud account is stored by Apple under your Apple Account and Apple's own privacy policy. We cannot read it, and it is never sent to us.
Sync is on whenever iCloud is available for KanjiMate. To turn it off, go to iOS Settings ▸ [your name] ▸ iCloud and turn off KanjiMate. Your data then stays on that device only.
Premium Purchases
KanjiMate Premium is sold by Apple through the App Store. Apple handles the payment, and we never see your payment details.
The app uses RevenueCat, a service that checks App Store purchases, to confirm and restore Premium. RevenueCat receives the App Store's record of your KanjiMate purchases, together with a random identifier it generates for the app and technical details such as the app version and the device's iOS version. It does not receive your name, your email address or your Apple Account, and it receives none of your study data.
RevenueCat processes this information on our behalf under its own terms, and we use it only to provide, verify and restore Premium.
Crash Reports
If the app crashes, it sends a report through Google's Firebase Crashlytics service so that we can find and fix the fault.
A report describes the state of the app's code at the moment of the failure, together with the app version, the device model, the iOS version and an installation identifier that Firebase generates. That identifier is not your name, your email address or your Apple Account, and we do not use it to identify you.
A report is not a copy of your cards, your notes or your study progress. Google processes these reports on our behalf under its own terms, and we use them only to diagnose problems.
What We Do Not Collect
KanjiMate collects no usage analytics. It does not record which kanji you open, how long you study or how you answer.
KanjiMate contains no advertising and no advertising SDKs, and it does not track you across apps or websites.
We do not sell personal information.
Notifications and Reviews
The daily reminder is a notification scheduled on your device. It is off until you turn it on, and nothing about it is sent to us.
The app may ask for an App Store review after you have studied for a while. The request is Apple's own system prompt; whether you respond and what you write are between you and Apple.
The App Store and Apple
Apple may provide us with aggregate, non-identifying sales and crash information through App Store Connect. We use it only to understand demand and fix problems.
Support Correspondence
Contact Support in the app's Settings opens an email addressed to support@leafworkstudio.com with your app version, iOS version and device model already written in it. You can read and change that text before you send it, and nothing is sent unless you send it.
When you email us, we receive the address you write from and whatever you choose to tell us. We use that only to answer you, and we keep it only as long as needed to handle the request and maintain a support record. You can ask us to delete it.
This Website
The KanjiMate pages on leafworkstudio.com are static pages that require no login. The site may use analytics to count page traffic in aggregate, which is separate from the app and never joined to anything in it.
Children's Privacy
KanjiMate is a general-audience educational app and is not directed to children under 13.
The app asks no one for a name, an email address or any other personal detail.
Deleting Your Data
You can remove cards, which deletes their review history, delete tags and groups, edit or clear your notes, and clear recent searches in the app. With sync on, each deletion reaches your other devices and your iCloud copy too.
Deleting the app removes what it stored on that device, but not the copy in your iCloud account, which a reinstall restores. You can manage or delete the data apps keep in iCloud from your Apple Account settings.
Crash reports and RevenueCat's purchase records are not tied to your name or account. If you would like us to look into deleting them, write to us and we will do what each service allows.
Policy Changes
We may update this policy from time to time. Material changes will be posted on this page with a revised Last updated date.
Contact
For privacy questions or requests, contact us at support@leafworkstudio.com.