Terms of Service / End User License Agreement

These Terms govern your access to and use of Lueurly (光痕信箋). Lueurly is a brand name used by TZU-YU CHIU, an individual developer based in Taiwan (not a registered trademark or company). TZU-YU CHIU (operating as Lueurly) is the operator/the party you contract with. Contact: [email protected].

1. Definitions

"Lueurly," "Service," or "app" means the Lueurly iOS app, backend services, website legal center, message delivery, pact features, subscription features, and related services.

"Lueurly," "we," "us," or "our" means TZU-YU CHIU (operating as Lueurly), the individual operator of the Service.

"Content" means text, voice, photos, pact documents, signatures, wax seals, replies, chat threads, metadata, and other materials available through the Service.

"User-Submitted Content" means Content that you create, upload, send, receive, sign, report, or otherwise submit through the Service.

"Service Fees" means charges for paid features. "Subscription" means the auto-renewable Premium subscription offered through Apple StoreKit.

2. Acceptance and 18+ Eligibility

By creating an account, accessing Lueurly, purchasing a Subscription, sending a message, signing a pact, or otherwise using the Service, you accept these Terms.

You must be at least 18 years old. Lueurly is for adults only and is not directed to children or minors. We may require information, such as birth year, to verify eligibility. If we learn that an underage account exists, we may terminate and delete it.

Lueurly is not offered to, and is not targeted at, users in the European Union, European Economic Area, United Kingdom, Switzerland, or South Korea. GDPR, UK GDPR, the Digital Services Act, and the Korean Location Information Act do not apply to the Service.

3. Account and Password Responsibility

You are responsible for maintaining the confidentiality of your account credentials and trusted devices. Activities performed through your account are your responsibility unless caused by Lueurly's intentional misconduct or negligence.

You must notify us promptly at [email protected] if you suspect unauthorized access.

4. Truthful and Non-Transferable Account Information

You must provide truthful, current, and non-misleading account information. You may not transfer, sell, rent, lend, or share your account except as allowed by the Service.

If your account is deleted or terminated, your right to use the Service ends.

5. Service Provision and Suspension

You are responsible for your device, operating system, internet connection, carrier charges, and compatible software environment.

We may suspend, restrict, or interrupt all or part of the Service when reasonably necessary for maintenance, security, abuse prevention, legal compliance, infrastructure failures, force majeure, or other operational reasons. Where practical, we will provide reasonable notice for planned material interruptions.

6. No Emergency Function

Lueurly is not an emergency, rescue, medical, law-enforcement, or alarm service. Do not use Lueurly to request emergency help or send time-critical safety communications. Contact local emergency services directly.

7. Content and Minimal License

You retain ownership of your User-Submitted Content, subject to rights held by others.

You grant Lueurly a limited, non-exclusive, worldwide license to host, store, encrypt, transmit, display, process, and technically reproduce your User-Submitted Content only as reasonably necessary to operate, secure, moderate, support, and improve the Service and to comply with law.

You represent that you have the rights needed to submit your User-Submitted Content and that it does not violate these Terms, the Community Guidelines, or applicable law.

8. Message Viewing, Review, and Deletion

Messages are generally intended for senders, recipients, and system processes needed to deliver the Service. Some metadata, such as delivery, read, device, location check-in, pact audit, report, or screenshot-detection records, may be processed for the relevant feature.

Lueurly may review, restrict, remove, preserve, or disclose Content when reasonably necessary to enforce these Terms, review user reports, respond to objectionable content, protect users, operate the Service, or comply with law. E2EE may limit what Lueurly can see unless a user report or other client-side action provides content for review.

9. Acceptable Use and Prohibited Conduct

You must follow the Community Guidelines. You may not use Lueurly to:

• violate law or another person's rights;
• harass, threaten, stalk, blackmail, impersonate, dox, or abuse anyone;
• send hate, extremist, sexually exploitative, non-consensual intimate, violent, graphic, or otherwise objectionable content;
• create, request, possess, distribute, or promote child sexual abuse material or sexual exploitation of minors;
• spam, phish, defraud, manipulate, or deceive users;
• upload malware, exploit vulnerabilities, bypass security controls, scrape, crawl, or overload the Service;
• reverse engineer the Service except where applicable law gives you a non-waivable right;
• use anonymous messages to evade responsibility;
• share accounts, resell access, or use the Service for unauthorized commercial messaging;
• interfere with reports, moderation, subscriptions, payments, or safety systems.

Users may report content and block other users. Lueurly may remove content, restrict features, suspend accounts, ban accounts, or report conduct to law enforcement where appropriate.

10. Subscription and Auto-Renewal

Lueurly Premium is offered as a monthly auto-renewable Subscription through Apple StoreKit. The current price, taxes, and currency are shown in the App Store at the time of purchase.

Your Subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Apple charges your Apple Account according to App Store rules. You can manage or cancel subscriptions in your Apple Account settings.

Apple handles payment processing and refunds. Lueurly does not receive your card number and does not separately process App Store refund requests.

Premium digital content and features may be delivered immediately after purchase. To the extent applicable consumer law provides a cooling-off or withdrawal period for digital content, you consent to immediate delivery and acknowledge that you may lose that withdrawal right once the digital content or service begins.

11. Intellectual Property and Software License

Lueurly and its licensors retain all rights in the app, software, interfaces, designs, service names, trademarks, documentation, backend systems, and other non-user materials.

Subject to these Terms, Lueurly grants you a limited, personal, non-transferable, non-sublicensable, revocable license to use the app for personal lawful purposes.

You may not copy, modify, distribute, sell, rent, lease, sublicense, host, or make derivative works from the Service, except as expressly permitted by these Terms or mandatory law.

12. Third-Party Services

Lueurly relies on third-party services, including Apple App Store, StoreKit, APNs, Sign in with Apple, Google Sign-In, Firebase Cloud Messaging, Hetzner Online GmbH hosting, and Resend email delivery. Those providers may apply their own terms and privacy practices.

We are not responsible for third-party services outside our control, but we select processors to operate the Service as described in the Privacy Policy.

Lueurly's backend (API, media, notification, authentication, and related server endpoints) runs on infrastructure operated by us under lumoraworks.uk. This is our own operational infrastructure, not a third party. The iOS app pins TLS connections to lumoraworks.uk.

Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you upon your acceptance.

13. As-Is Service and No Warranty

The Service is provided "as is" and "as available." To the maximum extent permitted by law, Lueurly disclaims warranties of merchantability, fitness for a particular purpose, title, non-infringement, uninterrupted operation, error-free operation, availability, accuracy, or data preservation.

Lueurly may include scheduled delivery, Sync Open, burn-after-read, device-bound messages, pact signing, E2EE, push notifications, and subscription features. These features depend on devices, networks, operating systems, backend availability, third-party services, and user behavior, and may not operate perfectly.

14. User Indemnification of Lueurly

You agree to indemnify and hold Lueurly harmless from claims, losses, damages, liabilities, costs, and expenses arising from your intentional or negligent violation of these Terms, your User-Submitted Content, your misuse of the Service, your violation of law, or your infringement of another person's rights.

This indemnity does not apply where prohibited by mandatory consumer-protection law.

15. Disclaimer and Limitation of Liability

Except for damages caused by Lueurly's intentional misconduct or gross negligence, Lueurly shall not be liable for any damages of any kind. In any case, our aggregate liability is limited to the fees you paid for the paid service (for subscriptions, an amount equivalent to one month's fee).

Nothing in these Terms excludes or limits liability for personal injury, fraud, intentional misconduct, gross negligence, or any liability that cannot be excluded or limited under applicable law.

Pacts and electronic signatures: Lueurly provides signing records and audit metadata, which may include time, IP, GPS where enabled, and device information, only as supporting evidence of intent. Lueurly does not provide legal advice. Lueurly does not provide a qualified electronic signature and does not guarantee compliance with eIDAS QES, ESIGN, UETA, or any other electronic-signature law. Whether a pact is legally valid depends on applicable law and the parties' actual intent.

Burn-after-read, Sync Open, and device-bound features are best-effort. Lueurly cannot prevent screenshots, screen recordings, photos of a screen, copied text, external recording, account compromise, recipient misconduct, or device-level bypasses. Burn-after-read content is cleared from the server no later than 1 hour after read and expiry, is not retained long-term, and backups roll over within 30 days.

Anonymous messages may hide the sender from the recipient, but anonymity is not impunity. Lueurly retains identifying information for safety, abuse review, legal compliance, and law-enforcement requests where appropriate.

16. Suspension, Termination, and Account Deletion

We may suspend, restrict, or terminate your account or access if you violate these Terms, violate the Community Guidelines, create legal or security risk, abuse anonymous messaging, infringe rights, evade moderation, use an underage account, or harm the Service or other users.

For ordinary violations, we will generally try to give notice where practical. For serious abuse, fraud, security threats, CSAM, imminent harm, legal risk, or repeated violations, we may act without prior notice.

You may delete your account in the app through Settings -> Delete Account or contact [email protected] if you cannot access the app. Deletion is governed by the Account Deletion explainer and Data Retention Policy.

17. Changes to Terms

We may update these Terms when the Service, law, safety needs, subscriptions, or operational practices change. Material changes will be announced with reasonable prior notice through the app, website, email, or another appropriate method.

If you continue using the Service for 15 days after notice, you are deemed to accept the updated Terms. If you object in writing, you must stop using the Service and may delete your account.

18. Non-Assignment

You may not assign, transfer, or delegate your rights or obligations under these Terms without Lueurly's prior written consent.

Lueurly may assign or transfer these Terms as part of a service reorganization, legal succession, asset transfer, or operational change, provided that your rights under mandatory law are not reduced.

19. Notices and Service-Provider Disclosure

Service provider: Lueurly is a brand name used by TZU-YU CHIU, an individual developer based in Taiwan (not a registered trademark or company). TZU-YU CHIU (operating as Lueurly) is the operator/the party you contract with.

Lueurly's backend (API, media, notification, authentication, and related server endpoints) runs on infrastructure operated by us under lumoraworks.uk. This is our own operational infrastructure, not a third party. The iOS app pins TLS connections to lumoraworks.uk.

Contact and dispute window: [email protected].

We may send notices through the app, email, website, push notification, or other reasonable means.

Copyright and DMCA notices: If you believe Content infringes your copyright, email [email protected] with your contact information, identification of the copyrighted work, identification of the allegedly infringing material, a statement of good-faith belief, a statement under penalty of perjury that the information is accurate and you are authorized to act, and your physical or electronic signature.

20. Privacy

The Privacy Policy explains what data Lueurly collects, how it is used, where it is stored, retention periods, processors, and your choices. By using the Service, you also agree to the Privacy Policy.

21. Governing Law and Jurisdiction

These Terms are governed by the laws of Taiwan (R.O.C.). Any dispute arising out of or in connection with these Terms shall be submitted to the Taipei District Court, Taiwan, as the court of first instance.

However, where mandatory consumer-protection laws grant you the right to bring proceedings in your country of residence, that right is unaffected.

Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you upon your acceptance.

22. Severability

If any provision of these Terms is held invalid, illegal, or unenforceable in any jurisdiction, that provision will be severed or reduced to the minimum extent required by law in that jurisdiction, and the remaining provisions will remain in full force and effect.

This document is the legally binding version. Translations are provided for convenience only; in case of conflict, the English version prevails.