Terms of Use
Last updated: June 22, 2026
These Terms of Use (the “Terms”) set out the conditions for using KotoKey (the “App”). The provider of the App is referred to below as the “Developer.” Users must read and agree to these Terms before downloading, installing, or using the App.
Article 1 (Scope and Agreement)
- These Terms apply between the user and the developer with respect to use of the App.
- By using the App, the user is deemed to have agreed to these Terms.
- If any separate guidance or explanation regarding the App conflicts with these Terms, these Terms shall prevail, unless otherwise required by applicable law.
Article 2 (Contents of the App)
- The App provides smartphone keyboard customization features, including themes, typing sounds, and Text Replacement.
- The developer may add, change, suspend, or discontinue any part of the App, including its features, display, specifications, pricing, advertisements, and support, at its discretion.
- Users are responsible for reviewing and accepting any changes to the App after such changes are made.
Article 3 (Eligibility and Operating Environment)
- Users use the App at their own responsibility.
- Users are responsible for managing their device, operating system, network environment, account settings, and other conditions necessary for use.
- The App may not function properly on all devices or operating systems.
- Users should maintain sufficient storage, network access, and operating system updates as needed.
Article 4 (Pricing, Paid Features, Ads, and the App Store)
- The App is available for free download.
- However, some features may be paid.
- Purchases, charges, purchase restoration, delivery, and refunds are handled in accordance with App Store rules and operations.
- Users are responsible for reviewing the App Store terms and payment conditions before making any purchase.
- The App may provide temporary access to some features through rewarded ads.
- The available duration, target features, and conditions of ad-based access may be changed or discontinued without notice.
- Refund requests, billing inquiries, and other payment-related procedures are handled in accordance with App Store rules and operations.
- The Developer cannot process or guarantee the outcome of refund decisions or payment processing on the App Store.
Article 5 (User Content and Data)
- Users are solely responsible for any information they create, input, save, transmit, or share through the App.
- Users must ensure that their content does not infringe copyright, portrait rights, personal information, confidentiality, or other rights of third parties.
- The App does not guarantee automatic backup of user content.
- Users acknowledge that content may be lost due to device failure, OS updates, app deletion, device replacement, or data loss, and should manage their own backups.
- Except to the extent required by law, the developer is not responsible for loss, alteration, leakage, or accidental transmission of user content.
Article 6 (Prohibited Conduct)
Users must not engage in any of the following conduct when using the App:
- Any conduct that violates applicable law or may create such a risk
- Criminal acts, fraud, unauthorized access, impersonation, spam, tampering, and similar conduct
- Copying, modifying, translating, reverse engineering, decompiling, or otherwise attempting to analyze the App
- Attempting to bypass the App’s security or communication functions
- Acts that infringe third-party intellectual property, privacy, honor, reputation, or other rights
- Sending or distributing malware, viruses, or other harmful programs
- Interfering with or improperly using the App’s operation
- Any other conduct reasonably deemed inappropriate in light of applicable law or the purpose of these Terms
Article 7 (Advertisements, Third-Party Services, and External Links)
- The App may include advertisements, partner services, external links, SDKs, APIs, and similar elements.
- The content, timing, pricing, and target audience of advertisements or partner services may change without notice.
- Users are responsible for reviewing the terms and privacy policies of any third-party service they use.
- The developer is not responsible for the accuracy, reliability, continuity, or results of advertisements or third-party services.
Article 8 (Intellectual Property)
- All intellectual property rights in the App, including its name, logo, design, sounds, images, programs, documentation, features, and specifications, belong to the developer or rightful owners.
- Users may use the App only within the scope necessary for its intended use and may not copy, distribute, publish, modify, sell, transfer, or sublicense it without permission.
- Any content created by users within the App generally belongs to the user.
Article 9 (Disclaimer and Limitation of Liability)
- The App is provided as-is, and the developer does not guarantee error-free operation, complete security, compatibility, or continuous availability.
- The developer makes no express or implied warranties regarding merchantability, fitness for a particular purpose, security, accuracy, or reliability.
- The Developer is not responsible for damages caused by network failure, OS updates, device malfunction, server downtime, ad delivery interruption, App Store specification changes, or other events beyond the Developer’s reasonable control.
- If the Developer is liable to a user for damages relating to the App, except in cases of the Developer’s willful misconduct or gross negligence, that liability is limited to ordinary and direct damages, to the extent permitted by applicable law.
Article 10 (Suspension, Account, and Termination)
- The Developer may suspend use, restrict features, discontinue the App, or take other reasonably necessary measures if a user violates these Terms or engages in improper use.
- Users may stop using the App at any time.
- The Developer may terminate all or part of the App where reasonably necessary. Where required by law or reasonably practicable, the Developer will provide prior notice in the App or on this page.
Article 11 (Personal Information and Privacy)
- The handling of personal information is governed by the separate Privacy Policy.
- Users should review the Privacy Policy and agree to it before use.
- Although the developer will manage personal data appropriately, it does not guarantee complete protection against all risks arising from network conditions, third-party services, or device settings.
Article 12 (Changes to the Terms)
- The Developer may amend these Terms where reasonably necessary, including due to changes in law or the App’s content or functionality.
- When amending these Terms, the Developer will announce the amended Terms and their effective date on this page or in the App.
- The amended Terms take effect on the announced effective date.
- If a user does not agree to the amended Terms, the user should stop using the App.
Article 13 (Governing Law and Dispute Resolution)
- These Terms are governed by the laws of Japan.
- Any dispute arising from use of the App should be resolved in good faith through discussion between the user and the developer.
- If no agreement is reached, the competent court in the developer’s location in Japan shall have exclusive jurisdiction in the first instance.
Article 14 (Consumer-Transaction Disclosure)
Please see the Consumer-Transaction Disclosure page.
Article 15 (Contact)
- If you have any questions about these Terms, please contact us at:
- Email: natsumin.apps@gmail.com
Article 16 (Severability)
If any provision of these Terms is held invalid or unenforceable under applicable law, the remaining provisions will remain in full force and effect.
Article 17 (Language)
If there is any discrepancy between the Japanese version of these Terms and a translation, the Japanese version prevails.