Yoinemu / 宵の眠り

Terms of Service

Last updated: May 3, 2026

These Terms of Service (the "Terms") set forth the conditions for use of the mobile application "Yoinemu (宵の眠り)" (the "App"), provided by an independent developer (the "Developer"). Users (the "Users") may use the App upon agreeing to these Terms.

Article 1 (Application)

  1. These Terms apply to all relationships between the Developer and Users regarding use of the App.
  2. By downloading, installing, or using the App, Users are deemed to have agreed to these Terms.
  3. The handling of personal information in the App is governed by the separately established Privacy Policy. The Privacy Policy constitutes a part of these Terms.

Article 2 (Description of the App)

  1. The App is a mobile application designed to assist Users in falling asleep by playing ambient sounds.
  2. The App is distributed through the Apple App Store and Google Play for iPhone and Android smartphones. Tablet devices (such as iPad) are not supported.
  3. User registration is not required to use the App. The Developer does not collect any personally identifiable information from Users in connection with use of the App.
  4. The App is provided entirely free of charge. There are no in-app purchases, subscriptions, or advertisements.

Article 3 (Intellectual Property)

  1. All copyrights and other intellectual property rights in the App itself and its program, design, graphics, logos, and similar materials belong to the Developer or to those who have granted licenses to the Developer.
  2. The sound sources provided in the App are used under the Creative Commons Zero (CC0) License or the Pixabay Content License, as published by third parties. Details of the author and source of each sound can be confirmed within the App via Settings → Acknowledgments.
  3. Users may not use the sound sources provided in the App beyond the scope permitted by each of the above licenses.

Article 4 (Prohibited Conduct)

Users shall not engage in any of the following acts in connection with their use of the App:

  1. Reverse engineering, decompiling, disassembling, or otherwise analyzing the programs constituting the App
  2. Unauthorized access to the App, its servers, or networks, imposing excessive load on them, or otherwise interfering with their normal operation
  3. Reproducing, redistributing, reposting, selling, or modifying the sound sources, images, text, or other content provided in the App beyond the scope permitted by the respective licenses
  4. Redistributing or reselling the App for commercial purposes
  5. Acts that violate applicable laws or public order and morals, or acts associated with criminal activity
  6. Acts that infringe the rights, interests, or honor of third parties or the Developer
  7. Any other acts that the Developer deems inappropriate

Article 5 (Disclaimer of Warranties)

  1. The App is provided "as is" without warranty of any kind. The Developer makes no warranty as to the completeness, accuracy, fitness for a particular purpose, non-infringement of third-party rights, or any other matter relating to the App.
  2. The App is operated by an individual, and the Developer does not guarantee its operation 24 hours a day, 365 days a year. Provision of the App may be suspended temporarily or permanently without prior notice due to maintenance, failures, communication conditions, suspension of external services, or other reasons.
  3. The App provides ambient sounds and is not a medical device. The App does not diagnose, treat, cure, or prevent any medical condition, including sleep disorders, and is not intended for medical use. If you have any concerns about your health, please consult a qualified medical professional.
  4. Except in cases of willful misconduct or gross negligence on the part of the Developer, the Developer shall bear no liability for any damages incurred by Users or third parties arising from the use of, or inability to use, the App.

Article 6 (Modification and Termination of the App)

  1. The Developer may change, add to, or remove the functions, content, design, and similar aspects of the App without prior notice to Users.
  2. The Developer may terminate provision of the App. When doing so, the Developer will, to the extent practicable, give prior notice through the App or the official website (https://yoinemu.app).

Article 7 (Modification of Terms)

  1. The Developer may modify these Terms without obtaining the individual consent of Users when the Developer deems it necessary.
  2. For material changes, notice will be given through the App or the official website. The latest version of these Terms will always be posted at https://yoinemu.app/terms.
  3. If Users continue to use the App after the modified Terms take effect, they are deemed to have agreed to the modified Terms.

Article 8 (Governing Law and Jurisdiction)

  1. These Terms shall be governed by the laws of Japan. Yoinemu is operated from Japan by an independent developer.
  2. In the event of any dispute between the Developer and Users regarding the App or these Terms, the Tokyo District Court shall be the court of exclusive jurisdiction for the first instance.

Article 9 (Contact)

For inquiries regarding these Terms or the App, please contact us at the address below. The Developer will respond to inquiries to the extent practicable but does not guarantee a reply to every message.

Email: support@yoinemu.app

Inquiries in English are welcome and answered to the best of the developer's ability. Japanese is also accepted.