DeepPiano Privacy Policy

Version Update Notice
Thank you for using DeepPiano! We have updated our Privacy Policy in accordance with the "Personal Information Protection Law of the People's Republic of China", the "Method for Identifying the Illegal Collection and Use of Personal Information by Apps", and other relevant laws, regulations, and technical specifications.

To better protect your personal information security and legal rights, we recommend that you carefully read the updated "DeepPiano Privacy Policy", especially the terms marked in bold black. If you have any objections or questions regarding the terms of this policy, you can communicate with us through the contact information published in Section X "Contact Us" of this policy.

Introduction

"Beijing Zhiqu Technology Co., Ltd." (the operating entity, hereinafter referred to as "we" or "us") respects and protects the personal privacy and information security of all users (hereinafter referred to as "you") who use the DeepPiano application (including but not limited to iOS, Android, and other platform versions) (hereinafter referred to as "this App") services. To clarify the matters related to our collection, storage, use, disclosure, and protection of your personal information while you use the services of this App, we have formulated this "DeepPiano Privacy Policy" (hereinafter referred to as "this Policy").

This Policy is a general privacy policy term uniformly applicable to our platform, applying to all products and services provided by this App. If other products or services of ours and our affiliated companies use the services provided by this App but do not have an independent privacy policy, this Policy also applies to those products or services; if the relevant products or services have an independent privacy policy, that independent privacy policy shall prevail, and for matters not covered therein, this Policy shall apply.

Before using any products or services of this App, please be sure to carefully read and thoroughly understand this Policy, especially the terms marked in bold, and start using them only after confirming your full understanding and agreement. If you (or your guardian) do not agree to any content of this Policy, you should immediately stop using this App. If you have any questions, comments, or suggestions about this Policy, you can contact us through the contact information we provide.

Part I: Definitions

Personal Information: Refers to various information recorded electronically or in other ways related to an identified or identifiable natural person, not including anonymized information.
Sensitive Personal Information: Refers to personal information that, once leaked or illegally used, may easily cause harm to the personal dignity of a natural person or endanger their personal and property security, including biometric, religious belief, specific identity, medical and health, financial account, and location tracking information, as well as the personal information of minors under the age of fourteen. In this Policy, sensitive personal information will be indicated in bold.
Personal Information Deletion: Refers to the act of removing personal information in the systems involved in realizing daily business functions, keeping it in a state where it cannot be retrieved or accessed.
Our Platform: Includes the DeepPiano application (including but not limited to iOS, Android, and other platform versions) operated by Zhiqu Technology and its affiliated companies, as well as subsequent newly developed or operated network platforms related to DeepPiano.
Our Platform Services: Various services (including new service forms emerging from future technological developments) such as sheet music browsing, AI transcription, and AI piano practice assistance provided by us to you based on the Internet in the form of a client (including APP, APK, etc.).
Affiliated Companies: Refers to companies and institutions that currently or in the future control Zhiqu Technology, are controlled by Zhiqu Technology, or are under common control with Zhiqu Technology. Control refers to the ability to directly or indirectly influence the management/operation of the controlled object through ownership, voting shares, contracts, actual operational affiliation, or other legally recognized methods.

Part II: Privacy Protection Policy

This policy will help you understand the following:

I. How We Collect and Use Your Personal Information

We follow the principles of "legality, justification, and necessity" to collect and use your personal information based on the core functions of this App and specific service scenarios. You understand and agree that to continuously optimize products and services, we may introduce new functions from time to time, and the scope and method of personal information collection and use may increase or change accordingly. In such cases, we will separately inform you explicitly by updating this Policy, through pop-up windows, or internal messages, and provide you with the option to consent or not. You have the right to refuse the update of this Policy, but if you refuse the information collection and processing necessary to implement the new function, we will not be able to provide you with that new function, which will not affect your normal use of the original basic functions.

The types of personal information and permission application scenarios required for each core function are individually notified below:

(I) Basic functions: Million sheet music library browsing, AI sheet music search

This App requires registration and login before use. When you use the sheet music library browsing and search functions, to ensure the normal realization of functions and the security of network system operations, we will collect your necessary device information (device model, operating system version, unique mobile device identifier (such as Android ID)), and record your operation information (browsing history, search history, collection history), which will be saved in the form of log files.

To ensure that search results comply with the copyright requirements of your region, we need to apply to obtain your location information (only used to identify regional copyright adaptation, not for other purposes). If you need personalized sheet music search recommendations (such as recommending relevant sheet music based on historical search preferences), location information will also be used to optimize recommendation results. You can choose to refuse to provide location information, but this may affect the availability of certain sheet music and the effectiveness of personalized recommendations.

(II) Account registration and maintenance functions

Account creation: When you register as a platform user to enjoy higher-quality exclusive services, you need to provide your mobile phone number (sensitive personal information) and create a username and password yourself. The collection of such information is used to provide you with account login services and ensure account security; if you refuse to provide your mobile phone number, you will not be able to complete the registration. If you use a third-party platform account (WeChat, QQ, etc.) to log in, with your authorization, the third-party platform will synchronize your nickname, avatar, and third-party account ID information with us. If you refuse to authorize, you will not be able to use the third-party account to log in, but it will not affect other login methods and the use of basic functions. You can bind or unbind third-party accounts at any time in [Settings - Account & Security - Account Binding], and unbinding will not affect basic service functions.

Profile maintenance and account retrieval: To improve the service experience, you can choose to supplement and perfect your personal profile (such as gender, birthday, personal bio). Such information is provided voluntarily, and not providing it will not affect basic services. If you forget your account password or need to retrieve your account, you need to provide relevant identity verification information (such as mobile phone number, frequently used login device, registration time, etc.), and if necessary, your identity may be confirmed through SMS verification. In case of account security disputes, to verify your real identity, you may be required to provide further verification information.

(III) Core functions: AI Transcription, Local Sheet Music Upload

AI Transcription: This function needs to generate sheet music through audio analysis, so we need to apply for your microphone permission and collect your recorded audio information (sensitive personal information). The audio information is only used for AI transcription algorithm processing to generate the corresponding sheet music. We will temporarily store or cache the audio according to functional requirements, and you can manually delete it after the function is completed.

Local Sheet Music Upload: If you need to upload locally stored sheet music files (such as PDF or image format sheet music), we will apply for your storage permission, which is only used to read local sheet music files and upload them to the platform, and will not read other unrelated storage content. The uploaded sheet music can only be viewed by you (unless you choose to share it publicly), and we will not disclose it to third parties without authorization.

(IV) AI Assisted Practice Functions: AI Score Following, AI Error Correction, AI Review

AI Score Following: This function uses an AI audio model to recognize your playing progress in real time and automatically turn the sheet music pages accordingly. If you use audio to trigger page turning, we need to collect your playing audio information; if you use local sheet music files to trigger page turning, we only need to read the sheet music file information you uploaded, without additionally collecting other personal information.

AI Error Correction, AI Review: These two functions need to analyze data such as your playing rhythm and pitch, so we need to collect your recorded audio information (sensitive personal information), combine it with AI algorithms to identify wrong notes, evaluate playing levels (such as pitch accuracy, rhythm stability score), and generate feedback reports. Audio information and evaluation reports are only used to provide you with piano practice guidance. We will store relevant data according to regulations, and you can delete it at any time in [Me].

(V) Special Functions: AI Sheet Music Video, AI Audio Tuning (Background Noise Removal, Wrong Note Correction, and Audio Quality Enhancement)

AI Sheet Music Video: This function needs to generate synchronous playing videos and dynamic sheet music. If you choose to synchronize local playing videos with sheet music videos, we will apply for your album permission, collect your recorded video and audio information (sensitive personal information), and use AI algorithms to achieve audio-video synchronization and dynamic sheet music generation. You can choose to save, share, or delete the generated video and dynamic sheet music. The original video/audio is only used for functional processing and will not be used for other purposes.

AI Audio Tuning: This function needs to optimize your playing audio quality, requiring the collection of your recorded audio information and local video information (sensitive personal information), and using AI algorithms to correct wrong notes and flaws and improve sound quality. You can choose to save the processed audio locally or to the platform cloud (accessible only by you). The original audio can be automatically deleted (or manually deleted by you) after the tuning is completed.

(VI) AI Master Class Function

When you use AI master classes (such as learning with world-class pianist teaching videos and playing along), we will collect your learning records (viewing/listening records, play-along duration, completion progress) to generate learning reports and recommend subsequent suitable courses for you. If you choose to submit play-along works (audio/video) for AI review, we will collect your submitted audio/video information, which is only used for AI review analysis and can be deleted by you independently after the review is completed.

(VII) Other Additional Functions and Permissions

Storage Permission: In addition to local sheet music uploads, this permission is also used to cache sheet music you have downloaded and processed audio/video files so that you can view and use them offline.

Notification Permission: If you subscribe to app updates, order reminders, account security notifications, etc., we will apply for your notification permission to push relevant messages to you. You can turn off this permission via [Settings - Notification Management]. After turning it off, you will no longer receive relevant pushes, but it will not affect the use of core functions.

Clipboard Permission: Only when you participate in platform activities (such as entering share codes, jumping to activity pages), we will temporarily access the share code and link information in the clipboard to realize activity linkage or page jumps. We will not store other unrelated information in the clipboard.

You can check the status of the above permissions item by item in your device settings and decide whether to turn them on or off yourself. Turning on any permission means you authorize us to collect and use relevant personal information to provide corresponding services; turning off the permission means you cancel the authorization, and we will no longer collect and use relevant information based on that permission, nor can we provide the corresponding services, but it will not affect the previous information collection and use based on your authorization, and the normal use of other services.

(VIII) Special Notes on Information Collection and Use

If the information you provide contains the personal information of others, you must ensure that you have obtained legal authorization; if it involves the personal information of minors, you must obtain the consent of their guardians. Guardians have the right to contact us to request the correction or deletion of relevant minors' personal information.

If we use your personal information for other purposes not specified in this Policy, or beyond the stated purpose and reasonable associated scope at the time of collection, we will obtain your explicit consent in advance. If we indirectly obtain your information from a third party, we will require the third party to prove that they have legally obtained your consent and inform you of the information type, purpose of use, etc., while verifying the legality of the third party's information source and adopting the same protection measures as for our own users' information.

According to laws and regulations, your authorization and consent are not required for collecting and using your personal information in the following situations:

Related to national security and national defense security;
Related to public security, public health, and major public interests;
Related to criminal investigation, prosecution, trial, and execution of judgments;
For the purpose of safeguarding your or other individuals' life, property, and other major legitimate rights and interests, but it is difficult to obtain your consent;
Personal information explicitly disclosed to the public by yourself;
Personal information collected from legally publicly disclosed channels (such as legal news reports, government information disclosure channels);
Necessary to sign and perform relevant agreements according to your requirements;
Necessary to maintain the safe and stable operation of this App (such as discovering and resolving product failures);
Other circumstances stipulated by laws and regulations.

II. How We Use Cookies and Similar Technologies

To ensure the normal operation of this App, provide you with a more convenient access experience, and offer personalized recommendation services, we may store Cookies, local storage, and other similar technologies (collectively referred to as "Cookies") on your device to record your preference information (such as commonly used sheet music types, page turning settings) and optimize function adaptation (such as adjusting the interface display according to the device type).

You can modify your acceptance of Cookies or reject our Cookies through your device browser or application settings functions, but if you reject them, it may affect the normal use of some functions (such as personalized recommendations, remembering login status).

In addition to Cookies, we may use similar technologies such as web beacons and pixel tags to track the use of functions (such as the completion rate of master class video viewing) to help us optimize product services. If you do not wish to be tracked, you can turn this off through relevant settings (such as unsubscribing from marketing pushes).

III. How We Share, Transfer, and Publicly Disclose Your Personal Information

(I) Sharing

We will not share your personal information with any third party at will, unless under the following circumstances:

With your explicit consent, share it with a third party specified by you;
To implement the functions of this App, it is necessary to share essential information with third-party service providers (such as server providers, technical support service providers). We will require these third parties to comply with this Policy and relevant confidentiality requirements, use the information only for the purpose of providing services, and not for other purposes;
Share with our affiliated companies, sharing only necessary information (such as for realizing account interoperability login). If an affiliated company changes the purpose of information use, it must obtain your consent again;
To deliver compliant advertisements and optimize advertising effects, we share de-identified and anonymized analytical information (such as "users aged 25-35 who like classical piano") with advertisers and agencies, which does not contain information that can identify your personal identity.

The relevant information of third-party SDKs integrated into this App is as follows:

SDK Name	Third-Party Entity	Information Shared	Purpose	Privacy Policy
Tencent Bugly SDK	Shenzhen Tencent Computer Systems Co., Ltd.	Network info, device info, app crash logs, Android ID	Crash reporting and stability monitoring	Link
Alibaba Cloud Storage SDK	Alibaba Cloud Computing Co., Ltd.	Device info, log info, user audio, user files	Cloud storage for user-uploaded audio and PDF files	Link
Alipay SDK	Alipay (China) Network Technology Co., Ltd.	Device info, order info, app list permission, Android ID, OAID, device MAC address	In-app payment processing via Alipay	Link
WeChat Pay SDK	Shenzhen Tencent Computer Systems Co., Ltd.	Device info, order info, app list permission	In-app payment processing via WeChat Pay	Link
Firebase SDK	Google	Anonymized app event statistics (e.g., feature usage frequency, page views, crash statistics), device model, OS version	App feature usage analytics and stability monitoring for continuous product optimization (no personally identifiable information is collected)	Link
360 Jiagu (App Hardening)	Beijing Qihu Technology Co., Ltd.	App package info (package name, version, signature MD5), basic device info (Android ID, OAID, OS version, device model)	Security hardening for Android APK	Link

(II) Transfer

We will not transfer your personal information to any company, organization, or individual, except:

With your explicit consent;
In the event of a merger, division, acquisition, asset sale, or bankruptcy liquidation, etc., provided the transferee agrees to protect your personal information in accordance with the requirements of this Policy and relevant laws and regulations.

(III) Public Disclosure

We will only publicly disclose your personal information under the following circumstances:

With your explicit consent;
In accordance with the mandatory requirements of laws, regulations, or competent authorities;
To safeguard public interests or the legitimate rights and interests of you or others, we will publicly disclose it within a reasonable and necessary scope.

If personal information is anonymized and de-identified so that the recipient cannot recover and identify specific individuals, disclosure does not require your separate consent.

IV. How We Store Your Personal Information

(I) Storage Location

The personal information we collect and generate during our operations is stored on servers located within the People's Republic of China. For details regarding international users and data storage, please refer to Section IX "Data Storage Location and Notice to International Users" of this Policy.

(II) Storage Period

Account information: During the existence of the account and for 90 days after deletion (to prevent malicious deletion)
Transaction records: Not less than 3 years from the date the transaction is completed (according to legal requirements)
Business data: Piano practice-related data will be deleted regularly every year, and some data will be saved for up to 3 years for product optimization and model training
Log data: Usually saved for 180 days

(III) Deletion and Anonymization

If this App ceases operations, we will notify you in advance through announcements, etc., stop collecting new personal information, and delete or anonymize the personal information that has been collected (unless otherwise required by laws and regulations).

V. How We Protect Your Personal Information Security

To ensure the security of your personal information, we adopt the following security measures:

Technical security protection: Adopting SSL encrypted transmission, encrypted information storage, data center access control, and other technical measures to prevent information from being leaked, tampered with, or stolen;
Security system guarantee: Establish a data security management system centered on the data life cycle, enhancing system security from multiple dimensions such as organizational construction, institutional design, and product technology;
Personnel security management: Strictly manage employees and outsourced personnel who may have access to your information, clarify access permissions, sign confidentiality agreements, and conduct regular privacy protection training;
Sensitive information protection: Adopt additional protection measures for sensitive personal information such as audio and mobile phone numbers (e.g., encrypted storage, strictly controlled access permissions), and your password is stored in an encrypted format and will not be transmitted or displayed in plaintext.

Please understand that the Internet environment is not absolutely secure. Although we have taken the above measures, we still cannot completely avoid the risk of information leakage. Please properly keep your account password and personal information safe. If you find any account abnormalities or information leakage, please contact us immediately for handling.

In the event of a personal information security incident, we will, in accordance with the requirements of laws and regulations, promptly inform you of the basic situation, impact, response measures, and remedial suggestions of the incident (such as via email, SMS, pop-up notifications, etc.) and report the handling status to regulatory authorities.

VI. How We Protect the Personal Information of Minors

We attach great importance to the protection of minors' personal information. If you are a minor under the age of fourteen, you must use this App and provide personal information after obtaining the consent of your guardian. Guardians should guide minors to properly use this App and protect their personal information security.

We only collect and use minors' personal information when permitted by law, with the consent of guardians, or when necessary to protect minors. If we discover that a minor has used this App and provided personal information without obtaining the guardian's consent, we will promptly delete the relevant information after receiving notification from the guardian.

If you are the guardian of a minor and have questions about the personal information of the minor under your guardianship, you can communicate with us through the methods in Section X "Contact Us" of this Policy.

VII. How You Exercise Your Personal Information Rights

You have the right to access, correct, or delete your personal information, withdraw your authorized consent, delete your account, etc. The specific ways to exercise these rights are as follows:

(I) Access your personal information

You can access it yourself through the following paths:

Account information: [Me - Account Information] to query the username, bound mobile phone number, third-party account binding status, etc.;
Personal profile: [Me - Edit] to view supplementary personal information (such as nickname, avatar, bio, etc.);
Usage records: [Me - History / My Favorites / My Recordings] to view related operations and usage records;
Other information: If you cannot access it through the above paths, you can contact customer service for assistance.

(II) Correct or supplement your personal information

You can correct information such as your nickname, avatar, and personal bio via [Me - Edit Profile]; if you find errors in your account information, usage records, etc., you can contact customer service to apply for correction, and we will process it promptly after verifying your identity.

(III) Delete your personal information

You can delete it in the following ways:

Self-deletion: Manually delete corresponding records in [Me - Browsing History / Favorites / Local Sheet Music Uploads];
Apply for deletion: You can contact customer service to apply for the deletion of relevant personal information under the following circumstances:
- Our behavior of processing personal information violates laws and regulations;
- Collecting and using personal information without your consent;
- Information processing seriously violates the agreement with you;
- You no longer use this App or have deleted your account.

After we respond to your deletion request, we will simultaneously notify the third parties who obtained your information from us to delete it promptly (unless otherwise provided by laws and regulations).

(IV) Withdraw authorized consent

You can individually turn off microphone, storage, location, and other permissions via Device Settings - Apps - DeepPiano - Permissions; you can also turn off authorizations such as personalized recommendations via [Settings - Privacy - Personalized Services]. After you withdraw your consent, we will no longer collect and use relevant information based on that authorization, but this will not affect the information processing previously conducted.

(V) Delete Account

You can submit an account deletion request via [Me - Settings - Account & Security - Delete Account] or contact customer service to assist with the deletion. After the account is deleted, you will no longer be able to use this account to log in to this App, and the rights, content, data, records, etc., under the account will be deleted or anonymized (unless otherwise provided by laws and regulations) and cannot be recovered. Please operate with caution.

(VI) Other Rights

You also enjoy the right to obtain a copy of your personal information, the right to restrict automated decision-making, the right to complain and report, etc. If you need to exercise related rights, you can contact customer service for assistance.

We will reply within 15 working days after receiving your request. For security purposes, you may need to provide identity verification information. We do not charge fees for reasonable requests; for repeated requests that exceed reasonable limits, we may charge necessary cost fees; we have the right to reject requests that are groundlessly repetitive, technically difficult to achieve, or may harm the legitimate rights and interests of others.

VIII. How This Policy Is Revised

We may irregularly revise this Policy based on product updates and changes in laws and regulations. After the revision, the updated policy will be published in a prominent position on this App (such as the homepage pop-up window or settings page), and you will be notified via SMS, internal messages, etc., when necessary.

If the revised content involves your core rights (such as major changes in the scope of information collection or purpose of use), we will provide more prominent notice to ensure that you are aware of and agree to it. If you continue to use this App after the policy update, it implies that you agree to the updated policy; if you do not agree, you should stop using this App.

You can view the latest version and historical versions in [Me - Privacy Policy] of this App.

IX. Data Storage Location and Notice to International Users

1. The servers for this App are located within the People's Republic of China. Regardless of your location, personal information generated during your use of this App (including but not limited to account registration information, operation logs, and piano practice data) is stored on servers in China and is used to provide you with the various functional services of this App.

2. This App is published globally (including but not limited to the Apple App Store, Google Play, and domestic Chinese Android app stores). If you are located outside of China, by using this App you acknowledge and consent to the transfer of your personal information to China for processing and storage. We will apply the same level of security protection measures to your personal information as we do for users within China.

3. We do not currently transfer personal information of users within China to destinations outside of China. The third-party analytics tools integrated into this App (such as Firebase SDK) only collect anonymized app event statistics, which do not constitute personal information and therefore do not constitute cross-border transfer of personal information. If this changes in the future due to business needs, we will fulfill the applicable compliance procedures in accordance with the law (including but not limited to security assessments, personal information protection certifications, or execution of standard contracts) and safeguard your right to be informed and your right of choice in accordance with the laws and regulations applicable at that time.

4. For users in the European Union / European Economic Area (EU/EEA), in addition to the rights already set forth in this Policy, you have the following additional rights under the General Data Protection Regulation (GDPR):

(1) Right to data portability: You have the right to receive your personal data in a structured, commonly used, and machine-readable format;

(2) Right to object: You have the right to object to the processing of your personal data based on legitimate interests;

(3) Right to restriction of processing: Under certain circumstances, you have the right to request the restriction of processing of your personal data;

(4) Right to lodge a complaint: You have the right to lodge a complaint with the data protection supervisory authority in your jurisdiction.

5. The legal bases for our processing of personal information include: performance of our service contract with you (necessary for providing App functionality), your informed consent, our legitimate interests (such as product improvement and security), and compliance with legal obligations. By agreeing to this Policy and using this App, you provide your explicit consent to the aforementioned data processing, including the cross-border transfer to China.

X. How to Contact Us

If you have any questions, comments, or complaints about this Policy, you can contact us through the following methods:

Contact Email: service@deeppiano.com
Online Customer Service: [Me - Customer Service] in this App

We will reply within 15 working days after receiving your request. If you are not satisfied with the reply, you can file a complaint or report to the cyberspace administration, public security, and other regulatory departments, or file a lawsuit with a people's court with jurisdiction.

XI. How to Delete Your Account

Self-service deletion path: Open this App - click [Me] - click "Account Information" in [Account and Settings] - click Log Out - click More Options - [Delete Account], and submit the deletion application according to the prompts.
Customer service assisted deletion: Contact online customer service or submit a deletion application through the aforementioned contact phone number or email, and we will complete the processing within 15 working days after verifying your identity.

Note: After the account is deleted, all rights and data will be cleared and cannot be recovered. Please operate with caution.

Please confirm again that you have fully read and fully understand the above terms.