Privacy Policy

Last updated: 2026-05-19
Effective date: 2026-05-19

DoLLC ("we", "us", "our") provides this Privacy Policy ("Policy") to explain how user information is handled in our mobile application "Yarikuri" (the "App").

1. Core principle

The App is a fully local application: all budgets, expenses, and savings-goal data is stored only on the user's device. We do not sync this data to our servers.

2. Information we do not collect

We do not collect the following:

• Personally identifying information such as name, email address, or phone number
• Demographic information such as address, age, or gender
• Any spending amounts, budgets, savings goals, categories, or memos that the user enters into the App
• Account information (the App does not provide an account system)

3. Information stored on the user's device

For the App's features to function, the following data is stored on the user's device and is never transmitted to our servers:

4. Third-party services

The App uses Google AdMob for ad delivery. AdMob may collect and use the following information for ad delivery and optimisation:

• Advertising ID (iOS: IDFA / Android: Advertising ID)
• Device information (OS version, model, etc.)
• Approximate location
• Ad impression and click statistics

For details, please refer to Google's policies:

• Google Privacy Policy: https://policies.google.com/privacy
• How Google uses information from sites/apps that use Google services: https://policies.google.com/technologies/partner-sites

Opting out of advertising ID use

Users can reset or limit the advertising ID via device settings:

• iOS: Settings → Privacy & Security → Tracking
• Android: Settings → Google → Ads → Reset advertising ID

On iOS, the App Tracking Transparency (ATT) prompt allows users to decline tracking. Declining does not restrict any App functionality.

5. Children's privacy

The App is not directed at any specific age group and does not collect age information. If a child under 13 uses the App, please ensure use is supervised by a parent or guardian.

6. Data retention

Data stored on the device is retained until the user performs one of the following:

• Uses the in-app data-reset feature
• Uninstalls the App
• Wipes the device

7. How to delete data

Users may delete their data via either of the following:

1. In-app data reset: Use the "Reset data" option in Settings to delete all stored data.
2. Uninstall the App: Removing the App from the device also removes its stored data.

8. Data security

Data is stored on the user's device. This initial release does not encrypt data at rest; however, since the data never leaves the device, it is protected by the device's own security mechanisms (screen lock, etc.).

9. Backup feature

The App lets users manually export/import data as a JSON file. The exported file is saved to a location chosen by the user (local storage, cloud storage, etc.), and the user is responsible for the handling of that file thereafter. We never access exported files.

10. Device permissions

The App uses the following device permissions to provide its features:

We do not use camera, location, contacts, microphone, or similar permissions.

11. Changes to this Policy

We may revise this Policy in response to legal changes or feature updates. The amended Policy takes effect once it is published on this page. Please check this page periodically for the latest version.

12. Contact

For questions about this Policy or the App, please contact:

• Developer: DoLLC
• Email: support@do-tech.jp
• Support: support.en.html (public URL: https://www.do-tech.jp/services/yarikuri/support)

Revision history