Scope

This Policy applies to information processed by the developer or by third-party services integrated into the App in connection with your use of the App.

Information processed independently by Google Play or another third-party service is also governed by that provider’s own privacy policy and terms.

Information the developer does not directly collect

The App does not require registration or login. The developer does not ask you to submit the following through the App:

• Your name, postal address, phone number or email address
• Your contacts, photographs, videos, audio or files
• Your precise location
• Numbers, amounts, percentages, rates or periods entered into calculators
• Your calculation results
• Credit card numbers or other payment-card details

The App does not display third-party advertising. It does contain an optional one-time purchase for permanent access to PRO features.

Information processed or stored on your device

The following information is generally processed or stored only on your device:

• Numbers entered into calculators and their results
• Language, light/dark mode and similar App preferences
• A local setting indicating whether PRO access has been unlocked

You can remove this locally stored information by clearing the App’s storage or uninstalling the App.

Third-party services and information processed

Purposes of processing

Information processed through the third-party services described above is used primarily to:

• Provide, maintain and improve the App
• Understand general trends in screen and feature usage
• Identify and correct crashes, defects and performance issues
• Prevent misuse and verify purchase status
• Deliver PRO features purchased through Google Play
• Comply with applicable law and lawful government requests

We do not use information for purposes that are unrelated to or incompatible with the purposes stated above.

Service providers, disclosure and sale of data

We do not sell or rent information concerning App users. Google and its subprocessors may process information as service providers for Firebase and Google Play where necessary to operate the App.

We may disclose information where required by applicable law, a valid court order or lawful government request, or where reasonably necessary to protect life, safety, property or legal rights.

International processing

Firebase and Google Play operate using Google’s global infrastructure. Technical, usage or diagnostic information may therefore be stored or processed in countries or regions outside Japan.

Such processing is subject to the service provider’s contractual, technical and organisational safeguards and applicable law.

Security

We use reasonable safeguards appropriate to the nature and scale of the information processed to reduce the risk of unauthorised access, loss, disclosure, alteration or destruction.

• Calculator content is generally kept on the device
• Administrative access is restricted and authenticated
• Only services and permissions reasonably needed by the App are used
• SDKs and dependencies are reviewed and updated
• Encrypted network connections provided by Firebase and Google Play are used

No internet transmission or electronic storage system can, however, be guaranteed to be completely secure.

Retention and deletion

Local App preferences and the local PRO-unlock state remain on your device until you clear the App’s data or uninstall the App.

Information processed by Google Analytics for Firebase, Firebase Crashlytics and Google Play is retained according to the relevant service settings, retention periods and contractual terms. Information is deleted or anonymised within a reasonable period when it is no longer necessary for its stated purpose.

Where information is linked only to an anonymous or pseudonymous identifier and cannot reasonably be connected to a particular user, we may be unable to locate or delete an individual record.

Your choices and rights

You can manage information connected with the App by:

• Clearing the App’s storage or cache in your device settings
• Uninstalling the App
• Adjusting Android or Google-account privacy settings
• Deleting or resetting your Android Advertising ID
• Choosing not to purchase PRO access
• Contacting us about how information is handled

Where we hold personal information that can identify you, you may request notice of purpose, access, correction, suspension of use or deletion to the extent provided by applicable law. We may need to verify your identity before responding.

Children

The App is not designed specifically for children. It does not include a feature through which children are asked to submit their name, contact details or other directly identifying information.

A parent or guardian who believes that information concerning a child has been processed improperly may contact us using the details below.

Changes to this Policy

We may update this Policy to reflect changes in applicable law, Google Play requirements, the SDKs used by the App or the App’s functions.

Material changes will be communicated through this page, the Google Play listing or another appropriate in-App method. An updated Policy applies from the date it is posted on this page.