Piano Sight Reading User Agreement
Updated: September 17, 2026
Effective: September 17, 2026
Welcome to Piano Sight Reading (the “App”) and its related services.
This Agreement is intended to explain the rules that apply when you download, access, register for, purchase through, or otherwise use the App. Please read it carefully, especially the provisions concerning permissions, paid services, limitations of liability, account deletion, governing law, and dispute resolution. If you are under the age at which you may independently consent to digital services in your location, please review this Agreement with your parent or legal guardian and obtain their consent before using the App.
By using the App or its related services, you confirm that you have read, understood, and agreed to this Agreement. If you do not agree, do not use the App.
Questions, comments, or complaints may be sent to support@lumen-labs.app.
I. Scope of Application and Definitions
1.1 This Agreement is entered into between you and Lumen Labs Studio, China (“Lumen Labs”, “we”, “us”, or “our”), regarding your use of Piano Sight Reading and the services we provide through it.
1.2 “User” or “you” means any person or organization that directly or indirectly obtains or uses the App. Consumer-only provisions apply only where the user is an individual acting outside a trade, business, or profession.
1.3 “Piano Sight Reading” or the “App” means the client application operated by us under that name, including its supported features, updates, and related webpages.
1.4 This Agreement includes the Piano Sight Reading Privacy Policy, Membership Agreement, Account Deletion Guide, in-App purchase disclosures, and other rules we lawfully publish for specific features. Those documents form an integral part of this Agreement. A specific rule controls only the matter it expressly covers.
II. Instructions for Use
2.1 Obtain the App only from an official application store or another channel we authorize. We cannot guarantee the security, integrity, or availability of an unofficial or modified copy.
2.2 The App provides sight-reading, song and chord practice, pitch and rhythm feedback, practice records, MIDI-keyboard connectivity, score import and recognition, personal score management, synchronization, and related learning functions. Features may vary by platform, region, device capability, and App version.
2.3 Some features require permissions or compatible equipment. Microphone access is used for on-device pitch recognition; camera, photo, or file access is used only when you select material for score import; Bluetooth or MIDI access is used to connect compatible keyboards. You may refuse optional permissions, but the related feature may then be unavailable.
2.4 Score recognition, pitch detection, rhythm analysis, ratings, and practice suggestions may be affected by image quality, the acoustic environment, device performance, score complexity, and technical limitations. You should verify imported scores and exercise your own judgment before relying on a result.
2.5 Membership is a fixed-term digital service purchased through the Apple App Store or Google Play. Current products are one-time, non-renewing terms of 30, 90, or 365 days, subject to the options shown by the applicable store. Additional rules appear in the Membership Agreement.
2.6 We may update, repair, replace, or discontinue versions of the App to improve security, compatibility, or functionality. An older version may stop working if it can no longer be safely maintained.
2.7 We grant you a personal, limited, revocable, non-exclusive, non-transferable, and non-sublicensable license to use the App for lawful personal learning purposes, subject to this Agreement. Rights not expressly granted remain reserved.
2.8 You must have all rights and permissions necessary for any score image, PDF, MIDI file, title, composer information, correction, feedback, or other material you submit (“User Content”). We provide technical processing only and do not grant you rights in third-party works.
III. Account Matters
3.1 Depending on platform and region, you may use the App through a guest profile or a supported account method such as Google Sign-In. Some functions, including cross-device synchronization and purchase restoration, may require a verified account.
3.2 You must provide information you are authorized to use and keep your account, third-party sign-in credentials, and device secure. You may not sell, rent, lend, transfer, or commercially share an account. Activity performed through your account is treated as yours unless caused by our fault or another circumstance for which the law makes us responsible.
3.3 A guest profile may depend on a device-held security credential. Uninstalling the App, clearing device data, changing devices, or losing that credential can make the guest profile unrecoverable. Keep an account or backup method where the App makes one available and you need cross-device recovery.
3.4 Account deletion
(1) You may request deletion only for an account you control, through the in-App account page or, if you cannot access the App, by contacting support and completing reasonable identity verification.
(2) A valid request locks the account and signs it out immediately. Final deletion is scheduled after a 30-day revocation period. During that period, you may request cancellation of deletion through support but cannot sign in to reverse it yourself.
(3) Membership time continues to run during the revocation period and is not paused or extended. Final deletion terminates remaining account-based benefits and does not itself create a refund.
(4) After final deletion, account data and cloud records cannot ordinarily be restored. Limited payment, tax, dispute, fraud-prevention, and security records may be retained where required or permitted by law.
See the Account Deletion Guide for the complete procedure and consequences.
IV. Protection of Users’ Personal Information
4.1 We value the protection of personal information and process it only for stated, lawful purposes. Relevant categories include account information, device and service logs, practice records, preferences, selected User Content, support communications, and membership or transaction status.
4.2 We use reasonable technical and organizational safeguards intended to prevent unauthorized access, alteration, disclosure, or loss. No system can eliminate all risk, so you should also protect your device and sign-in credentials.
4.3 We do not upload or retain raw microphone recordings when the microphone is used for real-time pitch recognition. We do not sell personal information or use private scores or microphone content to train public generative-AI models.
4.4 We share information only as described in the Privacy Policy, including with service providers necessary for sign-in, store purchases, consented analytics, and private object storage, or where law requires disclosure.
For complete details, including retention periods and privacy rights, read the Piano Sight Reading Privacy Policy.
V. User Conduct Rules
5.1 You are responsible for your conduct and User Content. Unless applicable law or our written permission allows it, you must not:
(1) violate applicable law or the lawful rights of another person;
(2) upload malware, unlawful material, infringing scores, or content you are not authorized to process;
(3) intrude into, scan, overload, disrupt, or bypass the security, access controls, purchase verification, or technical limits of the App or its services;
(4) reverse engineer, decompile, disassemble, or attempt to obtain source code except to the limited extent applicable law expressly permits;
(5) forge or reuse purchase evidence, abuse refunds or chargebacks, impersonate another person, or obtain benefits through deception;
(6) use bots, scrapers, or automated means to extract, train on, resell, or substitute for the App or its content without written permission; or
(7) interfere with another user’s learning, privacy, account, device, or lawful use of the service.
VI. Rules for Use of Piano Sight Reading Information Content
6.1 Without our written permission, you may not copy, monitor, mirror, republish, commercially exploit, systematically collect, or create a competing dataset or service from the App’s interfaces, learning materials, exercise organization, recognition output, or other service content.
6.2 Any permission we grant to use service content is limited to its written scope. You must preserve source notices, security controls, and attribution; prevent unauthorized third-party extraction; and not sell, sublicense, or use the content beyond the approved purpose.
6.3 You retain rights you lawfully hold in User Content. Solely to provide, secure, synchronize, troubleshoot, and improve the service you request, you grant us a non-exclusive, worldwide, royalty-free license to host, reproduce, transmit, and technically transform that content. The license ends when the content is deleted or the account is finally deleted, except for legally required retention and limited backup rotation.
VII. Handling of Breaches
7.1 If you violate this Agreement, we may, proportionately and where permitted by law, warn you, restrict a feature, reject or reverse an invalid benefit, remove unlawful content, suspend access, or terminate the account. We may preserve evidence and cooperate with competent authorities where legally required.
7.2 If your unlawful or breaching conduct causes a third-party complaint, claim, or loss, responsibility will be allocated under applicable law. Nothing in this clause requires a consumer to indemnify us beyond what mandatory law permits.
7.3 If you believe content processed through the App infringes your rights, contact us with sufficient identification of the work, the disputed material, and evidence of your rights. We will assess valid notices and counter-notices under applicable law.
VIII. Changes, Suspension, and Termination of Services
8.1 We seek to keep the service continuous and secure, but outages may result from maintenance, network failures, device incompatibility, third-party services, security incidents, force majeure, or other events beyond reasonable control.
8.2 We may modify, suspend, or discontinue a feature for product, technical, legal, or security reasons. Where a change materially and adversely affects paid rights, we will provide reasonable notice or an appropriate remedy as required by law.
8.3 You may stop using and uninstall the App at any time. Uninstalling alone does not delete your account, cloud data, or store transaction history; use the account deletion process if you want those account records deleted.
IX. Advertisements
9.1 The current version of Piano Sight Reading does not integrate third-party advertising services and does not use personal information for cross-context behavioral advertising.
9.2 If advertising or sponsored content is introduced in a future version, we will identify it as required, update the relevant disclosures, and obtain consent where applicable law requires it. You may manage App notifications through your device settings.
X. Intellectual Property
10.1 Except for User Content and identified third-party material, intellectual property in the App, including its software, interfaces, brand, graphics, exercise organization, technical implementation, and documentation, belongs to us or our licensors.
10.2 You retain rights in original material you submit and in third-party material you are lawfully authorized to use. Score import, recognition, correction, or storage does not transfer ownership of a musical work to us or grant you rights that you did not already have.
XI. Disclaimers
11.1 To the maximum extent permitted by law, the App is provided based on its current technology and availability. We do not promise that it will always be uninterrupted, error-free, compatible with every device or instrument, or suitable for every learning goal.
11.2 Recognition, scoring, and practice suggestions are educational aids, not guarantees of musical proficiency, examination results, professional instruction, or medical outcomes. Verify important scores and consult a qualified teacher when appropriate.
11.3 To the maximum extent permitted by law, we are not liable for indirect, incidental, special, exemplary, or consequential loss that was not reasonably foreseeable. Where liability cannot lawfully be excluded, it remains limited only to the extent the law permits.
11.4 Nothing in this Agreement excludes liability that cannot be excluded or limits any mandatory consumer, privacy, refund, repair, or other statutory right available in your location.
XII. Terms for Minors
12.1 The App is intended for a general music-learning audience and is not directed specifically to children. A user below the locally applicable digital-consent age must use the App only with the consent and guidance of a parent or legal guardian.
12.2 Guardians should review permissions, protect account credentials, supervise score uploads and purchases, and use store parental controls where appropriate.
12.3 If we learn that personal information was processed from a child without the consent required by applicable law, we will take reasonable steps to restrict or delete it.
XIII. Miscellaneous
13.1 This Agreement is governed by the laws of the People’s Republic of China, without depriving you of mandatory protections that apply in your place of residence. The parties should first attempt to resolve a dispute in good faith; if that fails, either party may submit it to a court with lawful jurisdiction.
13.2 We may revise this Agreement for changes in law, security, technology, or App functions. We will provide reasonable notice of a material change. If consent is legally required, the change will not apply until that consent is obtained.
13.3 If a provision is invalid or unenforceable, it will be applied to the greatest extent permitted and the remaining provisions remain effective. A failure to enforce a provision is not a waiver.
13.4 The headings are for convenience only. This English version controls if it conflicts with a translation, without limiting mandatory consumer or data-protection rights under applicable law.