Privacy Policy
1. Introduction
the Operator ("NK-FIELD") establishes this Privacy Policy (the "Policy") regarding the handling of personal information obtained in connection with the provision of this app. Please read it before use.
2. Information We Collect
This app stores the data you enter and create on your own device. The Operator maintains no servers and never collects, transmits, or views that data. However, solely to show the ads that let us offer the app for free, the information described below under "Information processed to show ads" is sent to an ad network (Google AdMob, provided by Google LLC).
[Information the Operator collects]
- None. This app requires no account registration, and the Operator itself performs no usage analytics or location collection.
[Information stored only on your device (not collected by the Operator)]
- Settings (sound, vibration, display options, language, etc.)
- Game stats (numbers of wins, losses and draws)
- The move record of a game in progress
This data is never sent outside your device.
[Information processed to show ads]
- To deliver ads, count impressions, and prevent invalid activity, the Google AdMob software (SDK) built into this app sends Google information such as your IP address, device model, OS and language, app version, and records of ad views and taps. On Android devices, the device's advertising ID is also sent.
- On iOS, before showing ads, this app asks for your permission to track (App Tracking Transparency). Only if you allow it, the device's advertising identifier (IDFA) is also sent to Google to show you more relevant ads. If you do not allow it, the IDFA is not sent and you can use every feature of this app as usual. You can change this at any time in Settings > Privacy & Security > Tracking.
- Ads shown are limited to content suitable for general and family audiences.
- In regions where the law requires consent, such as the European Economic Area, the United Kingdom, and Switzerland, consent is confirmed through Google's consent management before ads are shown. You can review or change your choices at any time from the app's settings screen.
- Google handles this information under the Google Privacy Policy (https://policies.google.com/privacy).
3. Purposes of Use
Because the Operator collects no personal information, the Operator itself has no purposes of use. Information sent to Google to show ads is used by Google to deliver and measure ads, prevent invalid activity, and, to the extent your settings and local law allow, personalize ads. Data on your device is processed solely on that device in order to provide the app's features (playing games, showing your stats and saving your settings).
4. Provision to Third Parties
We do not provide personal information to third parties except in the following cases.
- When the user has consented
- When required by law
- When ad delivery is entrusted to Google LLC (Google AdMob); the information described in Section 2 under "Information processed to show ads" is sent to that company
5. Provision to Third Parties Located Overseas
To show ads, the information described in Section 2 is sent to Google LLC (United States) and may be processed in the United States and other countries. The company takes security measures under its privacy policy and data processing terms. For information on the personal-information protection system in the United States, please refer to the information published by the Personal Information Protection Commission of Japan.
6. Security Management
- Communication for ads is encrypted with HTTPS. Data you enter (such as names) is never sent for ads.
- Data on the device is protected from other apps by the data isolation (sandbox) provided by the operating system.
- We recommend enabling a screen lock (passcode or biometrics) in case the device is lost or stolen.
- Deleting the app also deletes the settings, stats and any game in progress stored on the device.
7. Retention Period
- Information sent to Google to show ads is retained according to Google's policies.
- Data on your device remains there until you delete it or uninstall the app. The retention period is under your control.
8. User Rights
- Because the Operator holds no personal information, there is no information subject to requests for disclosure, correction, suspension of use, etc.
- In regions where consent is required, you can change your ad consent at any time from the app's settings screen.
- You can reset or delete the advertising ID in your device settings (Android: "Ads" in Google settings; iOS: Privacy & Security settings).
- You can review or delete information held by Google as described in the Google Privacy Policy.
- You can delete the data on your device at any time by uninstalling the app. For questions about this Policy, please contact us through the inquiry form.
9. Children's Privacy
- This app is not primarily intended for use by children under the age of 13.
- Children under 13 should use this app only with the consent of a parent or guardian.
- If the Operator becomes aware that it has collected the personal information of a child under 13 without parental consent, it will promptly delete that information.
- Where the law of your country of residence specifies a higher age (for example, 16 in parts of the EU), that age applies.
10. Cookies and Similar Technologies
This app does not use cookies. To show ads, the Google AdMob SDK may store ad settings and consent status on your device (under Google's policies).
11. Contact
For inquiries regarding privacy, please contact us at:
Inquiry form: https://forms.gle/2r84AJXZMPDaVMsd6
12. Changes to This Policy
This Policy may be revised without notice in response to legal amendments or changes in operating policy. We will notify you within the app of any significant changes.
Last updated: 2026-10-29