1. Definitions

1.1 "The App" means Keyu (课语), an iOS application, Bundle ID com.gacing.LectureCaptions, which generates live English captions of English-taught lectures with sentence-by-sentence Chinese translation.

1.2 "The Site" means the keyu.gacing.com website and its pages, including the product introduction, install entry, support page, and legal center.

1.3 "The Developer" means the individual developer who builds and distributes the App and operates the Site in a personal capacity, signing as GACING.

1.4 "User" or "you" means any natural person who downloads, installs, accesses, or uses the App or the Site.

1.5 "User Content" means content you produce while using the App, including session captions (bilingual text) and optional lecture recordings.

1.6 "System Frameworks" means Apple-provided iOS 26 capabilities such as SpeechAnalyzer, SpeechTranscriber, and Translation; recognition assets and translation language packs are distributed by Apple.

2. Acceptance and Scope

2.1 These Terms, together with the Privacy Policy, the Disclosures & Disclaimers, and any rules shown inside the App, constitute the entire agreement between you and the Developer.

2.2 By downloading, installing, opening, or using the App, or accessing the Site, you acknowledge that you have read, understood, and agree to be bound by these Terms. If you do not agree, stop using the App and delete it.

2.3 The Developer may revise these Terms from time to time; revised versions are published on this page with an updated effective date. Continued use after publication constitutes acceptance; if you disagree with a revision, your sole remedy is to stop using the App and delete it.

3. Nature of the App and License Grant

3.1 The App is a free study aid: no in-app purchases, no accounts, no advertising, distributed publicly by an individual developer.

3.2 Subject to these Terms, the Developer grants you a limited, non-exclusive, non-transferable, revocable license to install and use the App, for personal study purposes, on Apple devices that you lawfully own and that run iOS 26 or later.

3.3 This license transfers no ownership. All rights not expressly granted are reserved by the Developer.

4. Eligibility

4.1 You must have full legal capacity to use the App; minors should use it with the consent and guidance of a parent or guardian.

4.2 You are solely responsible for ensuring that downloading and using the App is lawful in your jurisdiction. The Developer makes no representation that the App is appropriate or lawful in any particular jurisdiction.

4.3 The App is suitable for learners of all ages; it collects no personal information from anyone (see the Privacy Policy).

5. Your Recording-Compliance Obligations

5.1 The App offers an optional lecture-recording feature (off by default; enabled only by you). Whether you may use it to record someone's lecture depends on the laws of your jurisdiction and the rules of your school.

5.2 Before enabling recording, you must verify for yourself that you hold every necessary permission. Note that: (a) some jurisdictions follow an "all-party consent" rule, requiring the consent of everyone present before a conversation is recorded; (b) some jurisdictions require only one-party consent, yet your school or course may still prohibit recording; (c) many schools treat unauthorized lecture recording as a breach of academic discipline or of the lecturer's rights.

5.3 Use of recorded material is likewise constrained: without permission, you must not distribute, publish, or commercially exploit lecture recordings or captions.

5.4 The App is only a tool. The Developer does not participate in, supervise, verify, or encourage any recording; all responsibility arising from your recording, retention, distribution, or use of recordings and captions rests with you alone. You agree to defend and hold the Developer harmless against third-party claims arising from such conduct.

5.5 If you cannot confirm that recording is lawful, do not enable the recording feature — captions work without it.

6. Acceptable Use

You agree not to:

• reverse-engineer, decompile, or attempt to extract the source code of the App (except to the extent such restriction is prohibited by applicable law);
• copy and redistribute, rent, sell, or otherwise commercially exploit the App or its installation package;
• remove or alter rights notices, markings, or license information in the App;
• use the App for activities that violate the laws of your jurisdiction or the rules of your school, including recording in violation of Section 5;
• pass off caption or translation output as an official record, examination material, or any authoritative text;
• attack, scan, abuse, or access beyond normal use the Site's install-distribution or diagnostic-log endpoints (diag.gacing.com).

7. Intellectual Property

7.1 The App's software, interface, and design, and the Site's original content, are the property of the Developer and are protected under applicable law.

7.2 Apple, iOS, SpeechAnalyzer, SpeechTranscriber, Translation, Dynamic Island, and Live Activity are trademarks or framework names of Apple Inc.; recognition assets and translation language packs are distributed by Apple and subject to Apple's license terms. The App's use of these components acquires no rights in them.

7.3 Neither the App nor the Site is affiliated with, sponsored by, or endorsed by Apple Inc. (see the Disclosures).

8. Ownership of User Content

8.1 Your User Content (session captions and recordings) belongs to you. It resides only on your device at all times (caption text is additionally stored, encrypted, with Apple via the system iCloud Backup if you have it enabled); the Developer never handles it and therefore acquires no right, license, or interest in it.

8.2 You may delete, export (txt / srt / Markdown), or share your User Content at any time; these operations are entirely under your control.

8.3 User Content may contain other people's lectures; use of such lecture content is subject to Section 5 and to the rights of the respective rights holders.

9. Privacy

9.1 How the App handles (and does not handle) data is described in the Privacy Policy, which forms part of these Terms.

9.2 In summary: recognition and translation run entirely on-device and never touch the network; there are no accounts, no analytics, and no third-party trackers; the only data ever sent to the Developer's server is a diagnostic log uploaded when you tap the button yourself (no caption text, no recordings, auto-deleted after 90 days).

10. Disclaimers

10.1 The App and the Site are provided "AS IS" and "AS AVAILABLE", without warranties of any kind, express or implied, including warranties of merchantability, fitness for a particular purpose, accuracy, and uninterrupted operation.

10.2 Captions and translations are generated on your device by Apple System Frameworks; their accuracy is not guaranteed and may be affected by accent, speaking rate, ambient noise, specialized vocabulary, device performance, and component versions.

10.3 Captions are a study aid only. They must not be the sole basis for medical, legal, financial, or other important decisions, and they are no substitute for listening, examinations, or hearing itself. Verify anything that matters.

10.4 The Developer makes no promise regarding the App's effectiveness in any course, examination, or study scenario.

11. Limitation of Liability

11.1 To the maximum extent permitted by applicable law, the Developer shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or relating to the use of, or inability to use, the App or the Site, including loss of data, missed lecture information, and academic or grading losses.

11.2 The App is provided free of charge. To the maximum extent permitted by applicable law, the Developer's total aggregate liability relating to the App and the Site shall not exceed zero (you paid no consideration).

11.3 Nothing in this Section limits liability that cannot be limited under applicable law.

12. Changes and Termination of Service

12.1 The Developer may update, modify, suspend, or terminate distribution of the App or the Site and any feature, with or without prior notice.

12.2 You may terminate this agreement at any time by deleting the App; deletion also removes sessions and recordings stored on the device, and this cannot be undone.

12.3 The App depends on System Frameworks and components provided by Apple; any change, restriction, or discontinuation of them by Apple may affect the App's functionality, for which the Developer bears no liability.

13. Governing Law and Dispute Resolution

13.1 These Terms are governed by the laws of the People's Republic of China (the Developer's location), without regard to conflict-of-law rules; mandatory consumer protections of your place of habitual residence remain unaffected where they cannot be excluded by agreement.

13.2 Disputes arising from these Terms or the App shall first be resolved through friendly consultation; failing that, either party may bring the dispute before a people's court with jurisdiction at the Developer's location.

14. General Provisions

14.1 Severability: if any provision is held invalid or unenforceable, the remainder continues in effect.

14.2 No waiver: the Developer's failure to exercise any right or remedy is not a waiver of it.

14.3 Entire agreement: these Terms, the Privacy Policy, and the Disclosures constitute the entire agreement between the parties regarding the App and the Site, superseding all prior communications.

14.4 Language: these Terms are drafted in Chinese; the English version is provided for convenience only, and the Chinese version controls in case of discrepancy.

14.5 Survival: Sections 5, 7, 8, 10, 11, 13, and 14 survive termination.

15. Contact

Questions, notices, or requests about these Terms: keyu@gacing.com. This is the only contact channel. The Developer will do their best to reply but promises no response time.