Privacy

Effective 14 September 2026

Nihongo Rush has no accounts and asks for nothing about you. It never asks your real name, your email, your age or your location, and it has no way to reach your contacts, your photos or your files. The "name" you pick in the app is one of four Japanese first names that Hachi uses in sentences; it is not your name.

What stays on your phone

Your progress — the words you have met and learned, your scores, coins, streak, stamps, settings and your onboarding answers — is stored on the phone itself. It is not uploaded and it is not part of any account.

Because it lives on the phone, it is included in the phone's iCloud or computer backup, so setting up a new iPhone from a backup brings it along. It does not sync between two phones you use at the same time, and deleting the app deletes it. We would rather say that plainly here than have you discover it later.

Your subscription is the exception. It belongs to your Apple Account rather than to the app, so it follows you to a new phone on its own. Use Restore purchases under ME to bring it back.

What the app sends

Nihongo Rush records how the app is used, so that the parts that confuse people can be found and fixed. Each installation gets a random identifier — a string with no meaning outside this app — and the records carry that identifier and nothing else that could point back to you. You can read your installation identifier at the bottom of the ME screen.

What is recorded (sent to PostHog, hosted in the European Union):

• Which screens are opened and in what order
• Your onboarding answers: why you learn Japanese, your starting level, your daily goal, when you prefer to study, and which of the four names you picked
• Each run: the district, the score, the combo, how many answers were right, whether the run ended by running out of hearts, and how many new words came up
• Whether the paywall was seen and whether a subscription or trial was started, and which plan
• Whether the rating prompt and the permission prompts were shown, and what you answered
• Basic device information: the model name, iOS version, app version and language, recorded once per installation

When the app crashes, a crash report goes to Sentry: the error, the code path that led to it, the device model, iOS version and app version. Crash reports contain no name, no email and no identifier that is linked to you.

Subscriptions are handled by RevenueCat together with Apple. RevenueCat receives the same random installation identifier and Apple's receipt for your purchase, which it needs to tell the app that your subscription is active. We never see your payment details; Apple takes payment.

Ads measurement, only if you allow it

When the app first opens, iPhone asks whether Nihongo Rush may track you across other companies' apps and websites. If you tap Allow, the app shares your device's advertising identifier and the fact that the app was installed or a subscription was started with Meta, so that we can see which ads bring new learners. If you tap Ask App Not to Track, the advertising identifier is not read and nothing is shared with Meta. The app works exactly the same either way, and you can change the answer at any time in iPhone Settings under Privacy & Security, then Tracking.

Reminders

If you allow notifications, the daily reminder is scheduled on the phone itself. Nothing is sent to a server for it, and you can turn it off or change the time under ME.

What is never sent

• Your real name, your email address, or any way to contact you
• Your location, at any accuracy
• Your contacts, photos or anything else on the phone outside the app
• Screen recordings, taps as coordinates, or heat maps

Deleting your data

Under ME, Delete my data erases everything the app stored on the phone. It does not touch your subscription. To have the usage records for your installation deleted from our side as well, write to support@nihongorush.com and quote the installation identifier shown under ME; they are gone within 30 days. Records without that identifier cannot be connected to you, and therefore cannot be looked up.

Children

Nihongo Rush is not directed at children under 13 and does not knowingly collect anything from them. The Apple ID rules of your country apply to the subscription.

Changes

If this page changes in a way that matters, the date at the top changes and the app shows the new version's notes. Questions: support@nihongorush.com.