Privacy Policy for Zenbun App

Effective November 1, 2026

This policy explains what the Zenbun Android app, run by Zenbun LLC, collects and why. If you have questions, email ZenbunLLC@gmail.com.

What stays on your device

Your flashcards, lesson progress and settings are stored on your device. Text recognition, translation, speech recognition and handwriting recognition run on your device, so we do not receive the images, text or voice recordings you use with them.

Android may include some app data in your own device backup, depending on your device settings.

Information collected for ads and analytics

Zenbun shows ads through Google AdMob and measures app use through Google Analytics for Firebase. These services automatically collect:

• Device and app identifiers, including the Android advertising ID, app set ID and app instance ID
• IP address, which can be used to estimate your general location
• App activity, such as app opens, screen views, sessions, taps and ad interactions
• In-app purchase and subscription events
• Diagnostic information, such as app launch time and performance data

We use this to show ads, understand how the app is used, keep it working, and prevent fraud. AdMob shares this data with Google for advertising, analytics and fraud prevention, and it may be used across other apps and services as described in Google's explanation of how it uses data.

Where required, the app asks for your consent to personalized ads. You can also reset or delete your advertising ID in your Android settings.

Information collected if you sign in

Signing in with Google is optional. It is only needed to buy or spend ōban. If you sign in, we use Firebase Authentication and Cloud Functions to store:

• Your name and email address from your Google account, and a Firebase user ID
• Your ōban balance and spending history
• Records of ōban purchases and Zen+ subscription allowances, including product and order IDs
• The study days and streak milestones used to award ōban

We use this to run your account, deliver what you buy, and prevent fraud. We check purchases with Google Play. Google Play handles payment, and we do not receive your card details.

If you buy a subscription, Google Play also tells us your subscription status, purchase date, renewal information and country of purchase, whether or not you sign in. We use this to provide Zen+ and manage your subscription.

Google Play Games

Where Play Games features are available and you are signed in to Play Games, your lesson progress, streak, points and rewards can be backed up to your Play Games account. Your Play Games name, score, streak and chosen badge can appear on leaderboards that other players can see.

Other services

Language models, podcast feeds and podcast episodes are downloaded from third-party hosts, such as Google, Apple and podcast publishers. Those hosts can see your IP address when your device connects to them. The app also contacts Google to check the current time. Google Play provides app updates and in-app reviews.

This website

If you use the Language button on this website, Google Translate loads from Google. It receives your IP address and the text of the page, and it stores your language choice in a cookie. Translations are automatic, so the English version of this policy is the one that applies.

If you sign in on the Delete Account page, Firebase Authentication receives your Google sign-in so we can delete the right account.

Who receives your data

We do not sell your personal information. Data is handled by Google through the services named above, and may be disclosed if the law requires it. All data these services collect is encrypted in transit.

Keeping and deleting data

We keep your account data until you ask us to delete it. You can request deletion of your account and data. We may keep purchase records where needed for fraud prevention, refunds or legal requirements.

You can remove the data stored on your device by uninstalling the app or clearing its data.

Children

Zenbun is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has given us personal information, email us and we will delete it.

Your rights

Depending on where you live, you may have the right to access, correct, delete or object to the use of your personal information. To make a request, email ZenbunLLC@gmail.com.

Changes

We will update this page when our practices change, and change the effective date above.