Privacy Policy

Last updated: 6 July 2026

This Privacy Policy explains how Hito Studio ("Hito Studio", "we", "us", or "our") handles information in connection with our website hitostudio.io.vn and our Android applications published on Google Play, including Wallpaper Donghua 3D 4K and any other apps released under the developer name "Hito Studio" (together, the "Services").

By using our Services, you agree to the practices described in this policy. If you do not agree, please stop using the Services.

1. Who we are

Hito Studio is an independent mobile app developer and publisher based in Hà Đông, Hà Nội, Vietnam. You can reach us at any time at vuhuy21122000@gmail.com.

2. Information we collect

2.1 Information you provide

Our apps do not require registration or a user account. We do not ask you to provide personal information such as your name, phone number, or email address in order to use the Services. If you choose to email us, we receive the email address and content you send.

2.2 Information collected automatically

When you use our apps, certain information is collected automatically by us and by the third-party services we integrate, in order to display advertising, understand how the app is used, and diagnose crashes. This may include:

• A device advertising identifier (such as the Google Advertising ID);
• Device and technical information — device model, operating system version, language/region, app version, and network type;
• App usage and interaction events (for example, which screens are opened) in aggregate form;
• Crash and diagnostic data when the app stops working unexpectedly;
• Approximate, coarse location derived from your IP address (not precise GPS location).

2.3 Website

Our website is largely static. Like most websites, our hosting server may keep standard technical logs (IP address, browser type, pages requested) for security and reliability. We do not use these logs to identify individual visitors.

3. How we use information

• To provide, operate, and maintain the Services and keep them free of charge;
• To display advertising, including through Google AdMob;
• To understand app usage in aggregate and improve features and content;
• To detect, diagnose, and fix crashes and technical problems;
• To protect against abuse, fraud, and security threats.

4. Advertising

Our apps are free and are supported by advertising delivered through Google AdMob. AdMob and its partners may use a device advertising identifier and related data to serve and measure ads, and — where permitted — to show personalized ads. You can control ad personalization and reset or delete your advertising identifier in your device settings:

• Android: Settings → Google → Ads (options include "Delete advertising ID" and "Opt out of Ads Personalisation").
• Learn more in Google's advertising and privacy information at policies.google.com/technologies/ads.

5. Third-party services

We rely on the following third-party providers, each of which processes data under its own privacy policy:

• Google AdMob (advertising) — policies.google.com/privacy
• Google Firebase (Analytics, Crashlytics, and Remote Config) — firebase.google.com/support/privacy
• Google Play Services — policies.google.com/privacy

6. Sharing of information

We do not sell your personal information. We do not share information with third parties except:

• with the service providers listed above, so they can perform advertising, analytics, and crash-reporting on our behalf;
• where required by law, legal process, or to protect the rights, safety, and property of Hito Studio or others.

7. Data retention

We keep automatically collected data only as long as needed for the purposes described above. Data held by our third-party providers is retained according to their own retention policies. You can reset your advertising identifier at any time to disassociate future ad data.

8. Children's privacy

Our Services are intended for a general audience and are not directed to children under the age of 13 (or the equivalent minimum age in your jurisdiction). We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will take appropriate steps to remove it.

9. Your choices and rights

• Opt out of personalized ads or reset/delete your advertising identifier in your device settings (see Section 4);
• Uninstall the app at any time to stop all further data collection by the app;
• Contact us to ask what data relates to you or to request deletion, to the extent it is within our control.

10. Security

We take reasonable technical and organizational measures to protect information. However, no method of transmission or storage is completely secure, and we cannot guarantee absolute security.

11. International users

We operate from Vietnam. By using the Services, you understand that your information may be processed on servers operated by us and our providers in various countries, subject to this policy.

12. Changes to this policy

We may update this Privacy Policy from time to time. When we do, we will revise the "Last updated" date at the top of this page. Continued use of the Services after changes take effect means you accept the updated policy.

13. Contact us