Privacy Policy for YOYO Calculator
Last updated: May 3, 2026
This Privacy Policy explains how Kabushiki Kaisha Osen (株式会社大銭) ("we", "our", or "us") handles information when you use the YOYO Calculator mobile application (the "App").
YOYO Calculator is a calculator utility app that provides tax calculation, discount calculation, calculator tools, saved calculation history, ads for free users, rewarded ads, and optional Pro purchases.
INFORMATION WE COLLECT
The App does not require users to create an account and does not ask users to submit personal profile information.
The App may process or store the following information:
1. Calculation history and app settings
The App may save calculation history, memo-related data, language settings, Pro status, and other app preferences locally on your device. This information is used to provide the App's features. We do not operate a separate account system or cloud database for this information.
2. Advertising and analytics data
The App uses Google AdMob to show banner ads and rewarded ads to free users. Google AdMob may collect or receive information such as device identifiers, advertising identifiers, approximate location, app interactions, diagnostic information, and ad interaction data for advertising, analytics, fraud prevention, security, and compliance purposes.
3. Purchase information
The App uses Google Play Billing for optional Pro subscriptions or purchases. Purchase processing is handled by Google Play. We may receive purchase status information necessary to unlock Pro features, but we do not directly collect or store your payment card information.
4. Diagnostic and performance information
Third-party services may collect diagnostic and performance information such as crash data, app performance data, and device information to help maintain app reliability, prevent fraud, and improve service quality.
HOW WE USE INFORMATION
We use information to:
- Provide calculator, tax, discount, history, and Pro features.
- Show ads to free users and hide ads for Pro users.
- Provide rewarded ad unlocks when users choose to watch an ad.
- Process and restore purchases through Google Play Billing.
- Maintain app stability, security, fraud prevention, and legal compliance.
- Understand app usage and improve the App.
THIRD-PARTY SERVICES
The App uses third-party services that may collect, process, or share information according to their own privacy policies:
Google AdMob
https://policies.google.com/technologies/ads
Google Play Billing / Google Play
https://policies.google.com/privacy
These third-party services may process data outside your country or region.
DATA SHARING
We do not sell personal information. Data may be shared with third-party service providers such as Google AdMob and Google Play when necessary to provide ads, analytics, billing, fraud prevention, security, and compliance functions.
DATA RETENTION AND DELETION
Calculation history and app settings stored locally on your device can be removed by deleting the relevant data in the App, clearing app data, or uninstalling the App.
Information processed by Google services is handled according to Google's policies and account settings. You may manage advertising preferences through your device settings and Google account settings where available.
CHILDREN'S PRIVACY
The App is intended for adults and is not directed to children. We do not knowingly collect personal information from children.
SECURITY
We use reasonable measures to protect information handled by the App. Data transmitted through Google services is transmitted over secure connections where supported by those services.
CHANGES TO THIS PRIVACY POLICY
We may update this Privacy Policy from time to time. The latest version will be posted on this page with an updated date.
CONTACT
If you have questions about this Privacy Policy, please contact us:
Email: ccjiao30@gmail.com
Kabushiki Kaisha Osen (株式会社大銭)
Osaka, Japan