Challog Privacy Policy

Effective Date: November 24, 2025
Developer: 404chen

This Privacy Policy explains how the Challog App (hereinafter referred to as the "Service") collects, uses, and discloses your personal information. By using the Service, you consent to the information collection and usage practices described in this policy.

1. Types of Information We Collect

The Service may collect the following types of information:

A. Information You Provide Directly (User Data)

When you set up a challenge or provide feedback, you directly provide the following information:

Challenge Progress Data: The challenge name, target value, current value, start date, and day count records you input into the App. This data is the core content used for the operation of the Service.

Feedback Data: When you use the "Feedback" feature, you provide your email address and your comments. This information is used solely to respond to your inquiries and improve the Service.

B. Third-Party Service Information (Login Data)

The Service offers a Google sign-in option to save your progress data. When you choose to use this feature:

  • We collect and store your Google User ID (UID) via a Third-Party Server to verify your identity and link your challenge progress data to your account.
  • We do not access or store your Google password or any other detailed profile information (unless actively provided by you in the feedback).

2. How We Use the Information

We collect your data primarily for the following purposes:

  • To Provide and Maintain the Service: To store your challenge progress and synchronize data when you use it across multiple devices.
  • Service Improvement: To analyze user behavior to optimize the App interface and features.
  • Communication: To use the email address you provided in feedback to respond to your inquiries or notify you of significant changes to the Service.

3. Disclosure and Sharing of Information

We commit not to sell or rent your personal information to third parties. We will only disclose your information in the following circumstances:

  • Service Providers: We utilize Third-Party Backend Service Providers to store and synchronize your data. These service providers are obligated to comply with strict confidentiality requirements in processing your data.
  • Legal Requirements: We may disclose your information to comply with legal obligations, protect our rights and safety, or respond to court orders.

4. Data Security

We value your data security and take commercially reasonable measures to protect the personal information you provide to us. All user data collected by the Service is encrypted during transmission using industry-standard security protocols.

Data Transmission Encryption:

  • All data transmitted between your device and our servers is encrypted using HTTPS/TLS (Transport Layer Security) protocols. This ensures that all information, including challenge progress data, personal profile information, feedback, and authentication credentials, is protected during transit.
  • All API communications are secured through encrypted connections, preventing unauthorized access to your data during transmission.

Database Security:

Database connections are encrypted using SSL/TLS protocols, ensuring that your data is protected when stored and retrieved from our database systems.

Authentication Security:

Authentication credentials and session tokens are encrypted using secure JWT (JSON Web Tokens) signed with industry-standard cryptographic algorithms.

Storage Security:

We implement commercially reasonable technical and organizational measures to protect your data at rest. However, please remember that no method of transmission over the Internet or electronic storage is 100% secure or reliable, and we cannot guarantee absolute security.

5. Children's Privacy

The Service is not intended for anyone under the age of 13. We do not knowingly collect personally identifiable information from children under 13. If we discover that a child under 13 has provided us with personal information, we will immediately delete such information from our servers.

6. Changes to this Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. You are advised to review this Privacy Policy periodically for any changes.

7. Contact Us

If you have any questions about this Privacy Policy, please contact us:

Email: 404chenhavefun@gmail.com