Privacy Policy

1. Introduction

Welcome to Sudoku100! We understand the importance of personal information to you and are committed to protecting your privacy. This privacy policy details how we collect, use, store, share and protect your personal information when you use our games and services.

Please read this policy carefully to understand how we handle your personal information. By using our services, you agree to the practices described in this policy.

2. Scope of Information Collection

We collect information from multiple sources to ensure the best gaming experience for you:

2.1 Information Collected Directly

When you register an account, use our services, or contact us, we may collect:

• Account Information: Username, email address, password (encrypted storage), account preferences
• Contact Information: Name and email address provided via email, online forms or in-app support functions
• User-Generated Content: Content created in the game, comments, feedback and suggestions

2.2 Automatically Collected Information

When you use our services, we automatically collect:

• Device Identifiers: Mobile device ID, advertising ID (such as IDFA, AAID), internal user ID, IP address
• Device Technical Information: Device type and model, operating system version, screen resolution, app version, language settings, time zone
• Network Information: Connection type (Wi-Fi, 2G/3G/4G/5G), estimated network speed, network operator
• Usage Analysis: Date and time of service usage, features used, game duration, level completion status, game progress
• Performance Data: App crash logs, startup time, response speed, energy consumption data, memory usage
• Location Information: Country, state, city information automatically detected via IP address (used for localized services and content recommendations)

2.3 Information Collected from Third Parties

We may receive information from the following sources:

• Social Media Platforms: When you log in or share content through social media accounts
• Advertising and Marketing Networks: Used for advertising effectiveness analysis and optimization
• Business Partners: Relevant user information provided by strategic partners
• App Stores: App installation and purchase data obtained from app stores

2.4 Special Category Information

We typically do not collect sensitive personal information (such as race, religious beliefs, health data, etc.). If we need to process such information, we will obtain your explicit consent in advance.

3. Purpose and Legal Basis for Information Use

We use the collected information for the following purposes, each with its corresponding legal basis:

3.1 Service Provision and Improvement

• Provide, maintain and improve our game services
• Create and manage your user account
• Process your requests, purchases and payments
• Send service-related notifications (such as account verification, password reset)
• Provide customer support and technical assistance

Legal basis: Performance of a contract, legitimate interests

3.2 Personalization and Optimization

• Personalize your gaming experience with localized content and recommendations
• Analyze usage patterns to optimize user interface and game features
• Conduct A/B testing to improve service quality

Legal basis: Legitimate interests, consent (where required)

3.3 Advertising and Marketing

• Display advertisements within our services (including personalized and non-personalized ads)
• Measure and analyze advertising effectiveness
• Send promotional information about our services (with your consent)

Legal basis: Consent, legitimate interests

3.4 Security and Compliance

• Detect, prevent and address fraud, abuse or illegal activities
• Comply with applicable laws, regulations and legal processes
• Enforce our Terms of Service and protect our rights

Legal basis: Legal obligation, legitimate interests

4. Cookies and Similar Technologies

We use cookies and similar tracking technologies on our website sudoku100.com to enhance your experience, analyze usage, and serve advertisements. This section explains what cookies we use and how you can manage them.

4.1 What Are Cookies

Cookies are small text files stored on your device by your web browser. They help us remember your preferences, understand how you interact with our website, and provide a more personalized experience.

4.2 Cookie Categories We Use

Necessary Cookies (Always Enabled)

These cookies are essential for the website to function properly. They enable core features such as user authentication and account management. Without these cookies, you would not be able to log in or use key features of our services.

• Authentication tokens (accessToken) — keeps you signed in
• User preferences (userInfo) — stores your language and account settings

Analytics Cookies (Optional)

These cookies help us understand how visitors interact with our website by collecting and reporting information anonymously. We use Google Analytics for this purpose. Analytics cookies allow us to measure page visits, session duration, traffic sources, and feature usage so we can continually improve our services.

• Google Analytics cookies (_ga, _gid, _gat) — track page views and user sessions

Advertising Cookies (Optional)

These cookies are used to display relevant advertisements. We use Google AdSense to serve ads on our website. Advertising cookies help limit how many times you see an ad, measure ad effectiveness, and — with your consent — personalize ads based on your interests.

• Google AdSense cookies (_gads, IDE, and related cookies) — enable ad serving and frequency capping

4.3 Third-Party Services

We work with the following third-party services that may also set cookies on your device:

• Google Analytics — a web analytics service provided by Google LLC. Google Analytics uses cookies to help us analyze how users use our website. The information generated by the cookie about your use of the website (including your IP address) will be transmitted to and stored by Google on servers in the United States. For more information, please see Google's Privacy Policy.
• Google AdSense — an advertising service provided by Google LLC. AdSense uses cookies to serve ads based on your prior visits to our website and other websites. For more information about how Google uses data when you use our site, please visit How Google Uses Information from Sites.

4.4 Managing Your Cookie Preferences

When you first visit our website, a cookie consent banner appears at the bottom of the page, allowing you to accept or customize your cookie preferences. You can choose to:

• Accept All Cookies — enable both analytics and advertising cookies
• Customize Settings — individually enable or disable analytics and advertising cookies (necessary cookies cannot be disabled)

You can change your cookie preferences at any time by clicking the "Cookie Settings" link in the website footer. This will reopen the cookie settings panel where you can update your choices.

Additionally, you can manage cookies through your browser settings. Most browsers allow you to block or delete cookies. Please note that blocking all cookies may affect the functionality of certain features.

5. Information Sharing and Disclosure

We do not sell your personal information to third parties. We may share your information only in the following circumstances:

5.1 Service Providers

We may share information with trusted third-party service providers who assist us in operating our website and services, including:

• Cloud hosting and data storage providers
• Analytics services (Google Analytics)
• Advertising partners (Google AdSense)
• Customer support platforms
• Payment processors (PayPal)

All service providers are contractually obligated to protect your information and use it only for the specific purposes we authorize.

5.2 Legal Requirements

We may disclose your information if required to do so by law or in response to valid requests by public authorities (e.g., court orders, subpoenas).

5.3 Business Transfers

In the event of a merger, acquisition, or sale of all or a portion of our assets, your information may be transferred as part of that transaction. We will notify you before your information becomes subject to a different privacy policy.

5.4 With Your Consent

We may share your information for other purposes with your explicit consent.

6. Data Security

We implement appropriate technical and organizational measures to protect your personal information against unauthorized access, alteration, disclosure, or destruction. These measures include:

• Encryption of sensitive data in transit (HTTPS/TLS) and at rest
• Password hashing and salting for account credentials
• Regular security assessments and vulnerability testing
• Access controls and authentication mechanisms

While we strive to protect your personal information, no method of electronic storage or transmission over the internet is 100% secure. We cannot guarantee absolute security but we work continuously to maintain a high level of protection.

7. Information Storage and International Transfer

Your personal information may be stored and processed on servers located in various countries, including the United States, where our third-party service providers (such as Google) operate. These jurisdictions may have data protection laws that differ from those in your country of residence.

We take appropriate steps to ensure that your information receives an adequate level of protection in the jurisdictions where it is processed, including implementing standard contractual clauses or other lawful transfer mechanisms where required.

8. Data Retention

We retain your personal information only for as long as necessary to fulfill the purposes described in this policy, unless a longer retention period is required by law. Specifically:

• Account information is retained for as long as your account remains active
• Usage data and analytics are retained for up to 26 months
• Cookie consent preferences are stored in your browser until you clear your browser data

When information is no longer needed, we securely delete or anonymize it.

9. Your Rights and Choices

Depending on your jurisdiction, you may have the following rights regarding your personal information:

• Access: Request a copy of the personal information we hold about you
• Rectification: Request correction of inaccurate or incomplete information
• Deletion: Request deletion of your personal information
• Restriction: Request restriction of processing under certain circumstances
• Portability: Request transfer of your data to another service
• Objection: Object to processing based on legitimate interests
• Withdraw Consent: Withdraw your consent at any time for processing based on consent, including cookie preferences

To exercise any of these rights, please contact us using the details in Section 11. We will respond to your request within the timeframe required by applicable law.

10. Children's Privacy

Our services are not directed to children under the age of 13 (or the relevant age of digital consent in your jurisdiction). We do not knowingly collect personal information from children. If we become aware that we have inadvertently collected personal information from a child, we will take steps to delete such information promptly.

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, technologies, or legal requirements. When we make material changes, we will notify you by:

• Posting the updated policy on this page with a new "Last Updated" date
• Displaying a notice on our website for significant changes

We encourage you to review this policy periodically to stay informed about how we protect your information.

12. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us at:

• Email: [email protected]
• Website: You can also reach us through our contact page at sudoku100.com

We will make every effort to respond to your inquiry promptly and resolve any concerns you may have about our privacy practices.