Radd Application Privacy Policy

1. Core Privacy Commitment

At Radd, protecting the privacy and data security of all users is our absolute top priority and the core principle of our app development and operation. This Privacy Policy detailedly outlines the types of data collected by the Radd application, the specific purposes for which the data is used, the secure storage and protection measures for the data, and the full rights that users have over their own personal data. Radd is independently designed with a local operation mode without any external dependencies, and all user data is processed, stored and managed entirely on the user's mobile device, ensuring the maximum level of privacy and security for user data.

By using any feature of the Radd application, you acknowledge that you have carefully read and fully understood all the content of this Privacy Policy, and voluntarily consent to the collection and use of your relevant data in accordance with the clear terms outlined herein. If you have any questions about this Privacy Policy, you can contact our official team via the contact information provided at the end of this document at any time.

2. Types of Data Collected by Radd

Radd only collects the minimum necessary data to ensure the normal operation of all core functionalities and to optimize the user experience, and all data collection behavior is completed locally on the user's mobile device. No user data is transmitted, uploaded or shared to any external servers, cloud platforms or third-party services unless explicitly initiated and operated by the user themselves. The specific types of data collected by Radd include the following categories:

• Noise Monitoring Data: Real-time environmental noise level readings, automatic noise threshold setting records, dynamic noise trend chart data, and categorized marking information for different types of noise events (including structural noise, creaking sounds and voice-related noise). This data is independently generated by the app's built-in professional noise detection feature based on the user's actual living environment and is only stored locally.
• App Usage and Preference Data: User-defined app settings preferences (such as sleep protection mode audio track selections, noise threshold warning values, map marker color and category settings), interactive operation logs (such as AI conversation history, map marker addition and editing records, data export operation records), and export file information (such as user-defined CSV file names, export time and data range).
• Non-Identifiable Local Device Data: Basic device information including mobile device model, operating system version and app installation version, which is only used to ensure the compatibility and normal operation of the app on different devices. This data is not linked to any personally identifiable information (PII) and is only stored locally on the device without any external transmission.

It is important to note that Radd does not collect any form of personally identifiable information from users, including but not limited to real names, phone numbers, email addresses, ID card numbers, bank card information and precise GPS location data. The resident map feature of the app only uses local non-geo-tagged marker functions and does not collect or obtain any real geographic location information of the user.

3. Specific Purposes of Data Use

All data collected and stored by Radd is used exclusively to provide, optimize and enhance the app's core functionalities and user experience, with no commercial use, third-party sharing or data monetization behavior of any kind. The specific and sole purposes of data use include the following aspects:

• Generating real-time dynamic noise trend charts and visualizing classified noise event data to help users accurately monitor, record and analyze the change patterns of neighborhood environmental noise
• Optimizing the personalized experience of the sleep protection mode, automatically adapting to the user's noise environment preferences and audio track selection habits, and providing a better noise masking effect
• Improving the accuracy and rationality of the AI conversation feature, generating more contextually appropriate and personalized communication scripts according to the user's usage habits and actual noise scenarios
• Maintaining the normal operation of the interactive resident map feature, securely storing the noise-prone area markers and category labels added by users locally, and ensuring the persistence of map data
• Realizing the cross-session continuity of all user data (including saved conversation logs, noise monitoring records, app settings and map markers) through advanced local persistence technology
• Identifying and fixing potential app bugs, optimizing app performance and improving the overall user experience based on anonymous and non-identifiable app usage data, with no personal data involved in this process

All data use behaviors of Radd are strictly limited to the scope of the app's internal functionalities, and no data will be used for any other purposes beyond the core functional scope of the app without the user's explicit consent.

4. Secure Data Storage and Protection Measures

All data collected and generated by Radd during the user's use of the app is stored entirely on the user's mobile device using industry-leading secure local persistence and encryption technology. The app does not transmit, share, store or back up any user data on any external servers, cloud storage platforms, third-party services or remote databases, ensuring that user data is always under the user's full control.

Radd has adopted a number of multi-level and comprehensive data protection measures to ensure the absolute security of user data, including the following key measures:

• Encrypted local storage for all sensitive user data (including noise monitoring logs, AI conversation records and map marker information) using advanced encryption algorithms to prevent unauthorized access and viewing by others
• User-controlled full data export function: users can freely export all local data as CSV files with self-defined filenames, and the entire export process is fully managed and operated by the user with no external data sharing
• Full user control over data deletion: users can delete individual data entries (such as a single noise record or conversation script) or all app data permanently at any time through the app's internal settings or by clearing the app's cache
• No automatic data synchronization: all user data remains on the user's original mobile device permanently unless manually transferred or exported by the user themselves, with no automatic data synchronization between different devices
• Strict data isolation: the app's internal data is strictly isolated from other applications on the device, and no data sharing or access between Radd and other third-party applications is allowed

The security of user data is also closely related to the security of the user's mobile device itself. We recommend that users set a secure screen lock password for their mobile device, avoid unauthorized use of the device by others, and regularly back up important data to prevent data loss caused by device damage or replacement.

5. Full Rights of Users Over Personal Data

As the sole owner of all local data generated by the use of Radd, users have full and complete control rights and disposal rights over their own data. Radd fully respects and protects all legitimate rights of users over their personal data, including the following core rights:

• Right to view: users can view all locally stored data (including noise logs, AI conversation scripts, map markers and app settings) at any time and without restriction within the app
• Right to edit: users can freely edit, modify or update any user-generated data (such as map marker labels, conversation script content and noise event notes) according to their actual needs
• Right to export: users can export all or part of the local data to CSV files with self-defined filenames at any time for personal use, backup or other legitimate purposes
• Right to delete: users can permanently delete individual data entries or all app data at any time according to their own wishes, with the deleted data being completely cleared from the device and unable to be recovered
• Right to opt out: users can opt out of the collection of anonymous non-identifiable app usage data (used for bug fixes and performance optimization) at any time by disabling the relevant setting in the app's internal settings
• Right to inquire: users can inquire about the collection, use and storage of their data at any time by contacting the official Radd team, and the team will provide a detailed and clear reply

If users need assistance with data management, such as data viewing, editing, export or deletion, they can contact our official team via the email address provided in this Policy, and we will provide the corresponding professional technical support and solutions.

6. No Third-Party Data Interactions

Radd is independently developed and designed with a pure local operation mode without any external dependencies, and the app does not integrate with any third-party services, application programming interfaces (APIs), software development kits (SDKs) or external plug-ins that may collect, use or access user data.

This includes, but is not limited to, advertising networks, data analytics platforms, social media integrations, cloud storage services, push notification services and third-party payment systems. No third party has the right to collect, access, use or share any user data generated by the use of Radd.

Any user data exported by the user through the app's export function (such as CSV files) and then shared, distributed or transmitted to third parties by the user is the sole responsibility of the user themselves. The Radd development team shall not be liable for any use, storage or disclosure of the exported data by third parties.

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