Terms of Use

Last Updated: April 10, 2026

This is an English translation provided for convenience. In the event of any conflict between this translation and the Japanese version, the Japanese version shall prevail.

Article 1 – Application

These Terms govern the conditions of use for Yomu (the "Service"). Users agree to these Terms before using the Service.

The Service provides features including PDF reading, full-text search, AI questions via voice/text, and subscription functionality. The Operator may add, modify, or discontinue features as necessary.

Users are deemed to have agreed to these Terms upon downloading or using the Service.

The Privacy Policy and any other individual terms separately established by the Operator form part of these Terms. In the event of conflict between these Terms and individual terms, the individual terms take precedence.

Article 2 – Getting Started

• All features can be used without creating an account.
• Users are responsible for managing their device, Apple ID, and purchase information.
• Active subscriptions can be cancelled through Apple's subscription management.

Article 3 – Prohibited Conduct

Users must not engage in the following conduct.

• Any act that violates laws, regulations, or public order and morals
• Criminal acts or acts that lead to criminal acts
• Acts that infringe on the intellectual property rights, privacy, honor, credit, or other rights or interests of the Operator or third parties
• Acts that interfere with or may interfere with the operation of the Service
• Unauthorized access or attempts thereof
• Reproducing, modifying, decompiling, disassembling, or reverse engineering the App or any part thereof
• Circumventing usage restrictions or impersonating third parties
• Providing benefits to antisocial forces or equivalent acts
• Handling content through the Service that is illegal or may infringe rights
• Any other act the Operator reasonably deems inappropriate

Article 4 – Intellectual Property

All intellectual property rights related to the Service, including copyrights, trademarks, patents, and design rights, belong to the Operator or rightful rights holders.

Users may not reproduce, transfer, lend, translate, adapt, publicly transmit, display, distribute, reprint, modify, or otherwise use all or part of the Service beyond the scope expressly permitted by these Terms.

Copyrights in user data belong to the user. Opinions, suggestions, and feedback provided by users to the Operator may be freely used by the Operator without compensation.

Article 5 – User Content & Data Handling

• Users shall only handle PDFs and other data they are lawfully entitled to use. Rights in user data remain with the user.
• In providing the AI question feature, the Operator may send text extracted from the currently displayed page and recent conversation content to a third-party AI service provider for processing. This processing is limited to the purpose of answering the user's question.
• The Operator does not use user data for training its own AI models. Handling of data by external AI service providers follows each provider's policies and settings.
• AI responses are automatically generated reference information; their accuracy or completeness is not guaranteed.
• PDF data handled on-device is principally stored on the user's device and is not permanently stored on the Operator's servers.
• Data handling upon Service termination follows the provisions of the Privacy Policy.

Article 6 – Paid Features & Billing

• The Pro Plan is a monthly or annual auto-renewing subscription.
• Billing, invoicing, renewal, cancellation, and refunds follow Apple's App Store terms and procedures.
• The free plan has a daily limit on AI questions. Core features such as reading and search are available without restriction unless separately limited.
• The Operator may revise plan contents and pricing within the limits permitted by applicable laws.

Article 7 – Service Changes, Suspension & Termination

The Operator may change, add to, or remove all or part of the Service's content without prior notice to users.

The Operator may suspend all or part of the Service without notice for system maintenance, inspection, or updates; force majeure (earthquake, lightning, fire, power outage, natural disaster, etc.); communication line failures; and similar circumstances.

When terminating all or part of the Service, the Operator will endeavor to notify users in advance by reasonable means to the extent possible.

The Operator bears no liability for damages incurred by users or third parties due to changes, suspension, or termination of the Service under this article.

Article 8 – Restriction of Use

If the Operator determines that a user has violated any provision of these Terms, belongs to antisocial forces, or is otherwise unsuitable to use the Service, it may restrict use, suspend the account, delete data, or take other necessary measures without prior notice.

The Operator bears no liability for damages incurred by users as a result of measures taken under this article.

Article 9 – Handling of Personal Information

Personal information of users is handled in accordance with the separately established Privacy Policy (https://yomu.juntaki.com/privacy-policy). By using the Service, users agree to the Privacy Policy.

Article 10 – Disclaimer & Limitation of Liability

AI responses are automatically generated reference information; their accuracy or completeness is not guaranteed. Users shall verify AI responses at their own responsibility.

The Operator does not warrant that the Service is free from defects in fact or law (including defects in safety, reliability, accuracy, completeness, effectiveness, fitness for a particular purpose, security, errors, bugs, or infringement).

The Operator bears no liability for any damages incurred by users in connection with the Service. However, this does not apply where the agreement between the Operator and the user constitutes a consumer contract under the Consumer Contract Act.

Even in the case of the preceding proviso, for damages caused by the Operator's minor negligence: (a) the Operator bears no liability for special, incidental, indirect damages, lost profits, data loss or corruption, or damages based on third-party claims; and (b) the Operator's total liability is capped at the total consideration actually received from the user in the preceding 12 months (or ¥1,000 for free users).

The Operator makes no warranty regarding compatibility between the Service and the user's device, OS, other applications, or third-party services.

Article 11 – Third-Party Services

• The Service uses third-party services including Apple Inc. (billing, subscription management) and AI service providers (AI question features).
• The terms of use and privacy policies of the respective third parties separately apply to the use of their services.
• The Operator bears no liability for failures or damages caused by third-party services.

Article 12 – Special Provisions for Apple Device Apps

When the App operates on iOS or other platforms by Apple Inc. ("Apple"), the following conditions apply.

• These Terms are entered into between the user and the Operator; Apple is not a party. The Operator alone bears responsibility for the App and its content.
• Apple and its subsidiaries are third-party beneficiaries of these Terms, and Apple has the right to enforce these Terms against the user.
• If the App fails to conform to any applicable warranty, the user may notify Apple, and Apple may refund the purchase price. Apple has no other warranty obligations.
• The user represents and warrants that they are not located in a country subject to U.S. Government embargo and are not listed on any U.S. Government prohibited or restricted party list.

Article 13 – Minors

Minors must obtain consent from a parent or other legal guardian before using the Service. If a minor uses the Service by falsely claiming to have such consent, or uses other deceptive means to appear legally competent, no legal act relating to these Terms may be rescinded.

Article 14 – Severability, Non-Assignment & Non-Waiver

Even if any provision of these Terms is held invalid or unenforceable by law, the remaining provisions shall remain in full force and effect.

Users may not assign, transfer, or pledge their position or rights and obligations under these Terms to a third party without the prior written consent of the Operator. The Operator may assign its position and rights and obligations under these Terms to a transferee when transferring the relevant business to a third party, and users hereby consent to such assignment in advance.

Failure or delay by the Operator to exercise any right under these Terms shall not constitute a waiver of such right.

Article 15 – Changes to Terms

The Operator may change these Terms without individual user consent pursuant to Article 548-4 of the Civil Code in either of the following cases: (1) when the change is in the general interest of users; or (2) when the change is not contrary to the purpose of the agreement, and is reasonable in light of the necessity of the change, the appropriateness of the changed content, and other relevant circumstances.

When changing these Terms, the Operator will notify users at least one month before the effective date of the changes, including the fact of the change, the changed content, and the effective date, via in-app notification, posting on this page, or other means.

If a user uses the Service after the effective date of the changed Terms, they are deemed to have agreed to the changed Terms.

Article 16 – Governing Law & Jurisdiction

These Terms are governed by the laws of Japan.

For any dispute arising between a user and the Operator in connection with these Terms or the Service, the Tokyo District Court shall have exclusive jurisdiction as the court of first instance.

Article 17 – Contact

For inquiries regarding these Terms, please use the support page: https://yomu.juntaki.com/en/support