Terms of Use
Last updated: May 18, 2026
Effective date: From the official release date
Welcome to the ddHiFi Link Android App, ddHiFi official website, ddHiFi unified account center, after-sales service, product support portal, and related services (collectively, the “Service”). These Terms of Use explain the specific rules you must follow when accessing, logging in, authorizing, connecting products, configuring devices, saving or sharing PEQ, viewing firmware updates, submitting feedback, applying for after-sales service, and using other ddHiFi services.
Developer name: ddHiFi
Company name: Guangzhou DD Electronics Technology Co., Ltd.
Contact email: support@ddhifi.com
1. Service Content
The Service may include the following functions, subject to the pages actually provided, App version, product model, regional services, and account permissions:
- ddHiFi account login, SSO authorization, account profile management, and login status maintenance;
- USB device identification, product connection, parameter configuration, PEQ configuration, local saving, cloud saving, downloading, and application in the ddHiFi Link Android App;
- Product manuals, FAQ, product support links, OTA configuration, firmware version history, and firmware file downloads;
- User feedback, after-sales support, warranty or repair-related services;
- Backend management, product materials, OTA, PEQ, feedback, file upload, and system operation support;
- Other related services authorized by ddHiFi to access the unified account center.
2. User Registration and Account Management
You may need to register or log in to a ddHiFi account when using certain services. You must ensure that the information provided during registration, login, authorization, and account use is true, accurate, complete, lawful, and valid, and update it promptly when it changes.
The ddHiFi Link Android App currently completes SSO login through the ddHiFi unified account center. During login, you may be redirected to the account center page and returned to the App according to the authorization process. You must properly safeguard your account, password, verification code, login device, access token, refresh token, and authorization status.
You are responsible for losses caused by your voluntary disclosure, transfer, lending, sharing of account, or failure to properly safeguard identity credentials, except where otherwise provided by laws and regulations or where it can be proven that the loss was caused by us.
If we discover abnormal login, malicious registration, API abuse, illegal or non-compliant use, risk of account theft, or other security risks, we have the right to take measures such as verification code verification, temporary lock, partial function restriction, identity re-verification requirement, service suspension, account freeze, or lawful handling.
3. Authorized Login and Connected Services
When other ddHiFi business systems access the unified account center, you may be asked to confirm login or authorization. After you complete authorization, the relevant system may obtain your account ID, nickname, avatar, mobile phone number, email address, region, account status, registration time, authorization scope, and other information within the necessary scope for identity recognition, service activation, after-sales handling, membership benefit identification, or services you actively request.
Connected systems must use your account information within the authorization purpose and necessary scope and must not process your information beyond the authorization purpose or the scope permitted by laws and regulations. If you have questions about the authorization scope, connected system, or use of account information, you may contact us through the “Contact Us” section of the Service or the contact information stated in the Privacy Policy.
Account cancellation, account restriction, account abnormality, authorization withdrawal, or termination of a connected system service may affect your continued use of ddHiFi-related services logged in through the unified account center.
4. App, Product Connection, and System Permissions
The ddHiFi Link Android App currently mainly uses network access and USB Host capability to implement service connection and product control. The App may require you to grant USB device access permission at the system level to identify and connect supported ddHiFi USB audio devices.
Unless a specific version or page provides a separate clear prompt, the current App usually does not actively request or collect system permission data such as precise location, contacts, call records, SMS content, camera, microphone recording, or photo album. If future versions add related permissions or capabilities, we will explain them to you through page prompts, system authorization pop-ups, or privacy document updates according to laws, regulations, and app store requirements.
When you connect, identify, configure, control, or manage ddHiFi products through the App, you should ensure that the phone system, App version, product model, firmware version, cable, adapter, USB authorization, and network environment meet the corresponding function requirements. Available functions may differ by product model, batch, firmware version, phone system, region, and usage environment. The actual display in the App, product instructions, firmware version, and official announcements shall prevail.
5. PEQ Configurations, User Content, and Interactions
You may save local PEQ configurations according to actual functions, or save PEQ configurations to the cloud after login. Cloud saving may involve configuration title, description, product model, PEQ file content, file URL, user nickname, avatar, user ID, creation time, operation IP, and other information.
You must ensure that content you upload, publish, comment on, favorite, share, or submit is lawful and true and does not infringe any lawful rights and interests of any third party. You must not submit illegal or non-compliant content, infringing content, fraud, malicious code, false information, illegal marketing, content that damages brand reputation, or other harmful content.
For PEQ configurations, comments, nicknames, avatars, and other content that you voluntarily upload or make public, you grant ddHiFi the right to use, copy, store, display, and disseminate such content within the scope necessary to provide, display, distribute, maintain, review, and improve related services. You still retain other rights you lawfully enjoy.
We have the right to review, delete, block, restrict display of user content, or restrict account functions based on laws and regulations, platform rules, user complaints, system security, or service operation needs.
6. Firmware Updates and Device Operations
If the App provides firmware version viewing, firmware update prompts, or online firmware update functions, you should operate cautiously after understanding the meaning of the relevant functions. During firmware update, please keep the product connection, battery level, network environment, and phone status stable, and avoid disconnecting, closing the App, force quitting, restarting the device, or performing other operations that may interrupt the update.
You must not use accessories, cables, firmware, or tools from unknown sources, non-conforming specifications, damaged, modified, or not officially recommended. You must not disassemble, modify, crack, flash, tamper with, or otherwise interfere with ddHiFi products, the App, firmware, communication protocols, or security mechanisms without authorization.
You are responsible for product abnormalities, unavailable functions, data loss, or other losses caused by your interruption of updates, use of unofficial firmware, use of unofficial tools, modification of the system environment, failure to follow prompts, or use of products in unsuitable environments, except where otherwise provided by laws and regulations or where it can be proven that the issue was caused by us.
ddHiFi products and related Apps are mainly used for the connection, configuration, and usage support of consumer audio products and should not be used in medical, rescue, industrial control, aviation, traffic safety, life support, or other high-risk scenarios.
7. Feedback, After-Sales Service, and External Links
When you submit App feedback, after-sales applications, inquiries, or other service requests, you must provide true, accurate, and necessary information. The information you submit will be used to handle feedback, after-sales service, warranty, repair, returns and exchanges, customer service, and dispute handling.
The Service may provide product manuals, FAQ, contact information, dealer information, account center, official website statement pages, or other external links. Related pages may be provided by ddHiFi or third parties. When accessing third-party pages, you should comply with the service terms and privacy policies of the corresponding pages.
8. Rules of Use
You must comply with the laws and regulations of the People’s Republic of China, these Terms, rules published by the Service, and relevant page prompts, and must not use the Service to engage in illegal, non-compliant, infringing, fraudulent conduct, disrupt platform order, or harm the lawful rights and interests of us, other users, or third parties.
Without our written consent, you must not copy, disseminate, tamper with, crawl, make bulk calls to, reverse engineer, decompile, attack-test, bypass security mechanisms of, commercially exploit, or otherwise use this website, App, APIs, account system, firmware, communication protocols, databases, pages, programs, data, or other service components beyond normal access and use purposes.
You must not interfere with the normal operation of the Service, and must not infringe others’ intellectual property rights, privacy rights, reputation rights, personal information rights, or other lawful rights and interests.
9. Intellectual Property
All content in the Service, including but not limited to text, images, audio, video, trademarks, logos, product names, layout design, interface design, program code, databases, technical documents, page structures, App, firmware, service processes, and other content, is protected by intellectual property laws and regulations and belongs to us or the relevant rights holders.
Without written authorization from us or the relevant rights holders, you must not use, copy, modify, reprint, disseminate, display, sell, license, reverse engineer, or otherwise exploit any intellectual property-related content of the Service without authorization. If you violate this clause, you shall bear corresponding liability in accordance with law.
10. Privacy Protection
We value your privacy and personal information protection, and will collect, use, store, protect, entrust the processing of, share, transfer, publicly disclose, and delete your personal information in accordance with the Privacy Policy, Personal Information List, Third-Party Information Sharing List, Account and Data Deletion Instructions, and relevant laws and regulations.
By using the Service, you indicate that you have read and understood the relevant privacy documents. If you do not agree to the relevant content, please stop using the related services that may involve personal information processing.
11. Disclaimer
The Service is provided based on existing technology and in its current state. We will make reasonable efforts to ensure that the Service is stable, secure, and available, but do not guarantee that the Service will be uninterrupted, error-free, completely secure, or fully meet your specific needs at any time, in any location, on any device, in any network environment, or for any product model.
To the extent permitted by law, we will not be liable for corresponding compensation for service interruption, data abnormality, login failure, authorization failure, connection failure, notification delay, firmware update failure, or other losses caused by network failure, system maintenance, server adjustment, device failure, USB authorization failure, device compatibility issues, third-party service abnormality, communication line issues, force majeure, hacker attacks, virus infection, malicious programs, government actions, changes in laws and regulations, or other factors beyond our control.
12. Liability for Breach
If you violate these Terms, related agreements, page rules, product instructions, laws and regulations, or infringe the lawful rights and interests of others, we have the right to take measures based on the specific circumstances, such as prompting rectification, deleting or blocking content, restricting functions, suspending services, freezing accounts, canceling authorization, terminating services, canceling accounts, or pursuing liability in accordance with law.
If your conduct causes losses to us, other users, or third parties, you shall bear corresponding liability in accordance with law.
13. Changes and Termination of Terms
We have the right to modify these Terms according to changes in laws and regulations, business development, service adjustments, product updates, system security, app store requirements, or operation needs. The modified Terms will be published on the official website, App, account center, or other reasonable location and will take effect from the publication date or the effective date indicated on the page. If updates involve your material rights and interests, we will provide prompts in a reasonable manner.
If you do not agree to the modified Terms, you should stop using the Service. If you continue to use the Service, you will be deemed to have accepted the modified Terms.
You may stop using the Service or apply to cancel your account according to the Account and Data Deletion Instructions. After account cancellation, you may no longer be able to use App login, cloud PEQ, feedback, after-sales record query, product registration, or other unified account services that rely on the account.
14. Dispute Resolution
The formation, performance, interpretation, and dispute resolution of these Terms shall be governed by the laws and regulations of the People’s Republic of China.
Any dispute arising from these Terms or the Service shall first be resolved by friendly negotiation between the parties. If negotiation fails, either party has the right to file a lawsuit with the people’s court having jurisdiction at the company’s domicile.
15. Others
Matters not covered by these Terms shall be governed by the User Agreement and related supporting documents. If any part of these Terms is determined to be invalid, the validity of the remaining terms shall not be affected.
If you have any questions, suggestions, or complaints about these Terms, you may contact us by:
Official email: support@ddhifi.com
The above content is a translated version. In the event of any conflict with the Chinese description, the Chinese version shall prevail.
