Last updated: Nov 9, 2025
This English version is provided for convenience. In case of any discrepancy between the Japanese version and this English version, the Japanese version shall prevail.
These Terms of Service (the “Terms”) set forth the conditions for using the Morse code learning application “MorseLink” (the “App”) provided by Dotnull Inc. (the “Company”, “we”, “our”, or “us”). Please read the Terms carefully before using the App. By using the App, you are deemed to have agreed to the Terms.
Article 1 (Scope)
The Terms set forth the rights and obligations between the Company and users regarding the use of the App and apply to all relationships related to the use of the App between users and the Company.
Article 2 (Definitions)
The terms used in the Terms shall have the meanings set forth below.
- “App” means the application “MorseLink” provided by the Company.
- “User” means any individual who uses the App.
- “Account” means the information registered by a user to use the App.
- “Paid Plan” means the paid subscription service offered in the App.
- “Energy” means virtual points required to use certain features of the App.
- “AI Coach” means the AI chat features provided in the App (coach, buddy).
- “User-Generated Content” means content created, transmitted, or stored by users through the App, such as chat history and drill results.
- “Intellectual Property Rights” means copyrights, patent rights, utility model rights, design rights, trademark rights, and other intellectual property rights (including the right to acquire such rights or to apply for registration thereof).
Article 3 (Account)
- If you register information about yourself when using the App, you must provide true, accurate, and complete information.
- You may create an account using Firebase Authentication (Apple/Google/Email).
- You shall manage your password and account information related to the App with due care and responsibility.
- You must not allow any third party to use your account, nor lend, transfer, change the name of, sell, or otherwise dispose of your account.
- The Company shall not be liable for any damages caused by misuse of your account information or use by a third party.
- You may delete your account and withdraw from the App at any time through the procedures prescribed in the App. If you withdraw, the Company will delete your User-Generated Content within the period specified in the Privacy Policy.
Article 4 (Paid Plan)
- By subscribing to a Paid Plan, you may use certain features such as increasing the Energy cap and disabling advertisements.
- The price, payment timing, and whether a free trial is available are as displayed on the in-app purchase screen or on the App Store / Google Play.
- The Paid Plan is a subscription and will automatically renew unless you cancel it.
- Cancellation and refunds are subject to the policies of Apple Inc. or Google LLC. As a general rule, the Company does not provide refunds.
Article 5 (Prohibited Conduct)
When using the App, you must not engage in any of the following acts, or any act that the Company deems to fall under any of the following.
- Acts that violate laws and regulations or are related to criminal acts
- Fraud or threats against the Company, other users, or other third parties
- Acts that are contrary to public order and morals
- Acts that infringe the intellectual property rights, portrait rights, privacy rights, honor, or other rights or interests of the Company, other users, or third parties
- Acts that impose an excessive load on the network or systems of the App
- Acts that may interfere with the operation of the App
- Unauthorized access to the Company’s network or systems
- Reverse engineering, decompiling, disassembling, or other similar acts
- Acts that improperly manipulate the service using bots, cheat tools, or other technical means
- Acts that use the App by unlawfully exceeding Energy limits
- Entering your personal information (such as name, address, phone number, email address, credit card number) or the personal information of others into the AI Coach feature
- Causing the AI Coach to generate, or transmitting through the App, discriminatory, violent, defamatory, obscene, or other content deemed inappropriate by the Company
- Collecting information about other users
- Advertising, solicitation, or business activities within the App without the Company’s permission
- Any other acts deemed inappropriate by the Company
Article 6 (Intellectual Property Rights)
- All Intellectual Property Rights related to learning materials, dictionaries, audio data, AI Coach responses, and all other content provided by the Company in the App belong to the Company or to parties who have granted a license to the Company.
- With respect to User-Generated Content provided through the App, you grant the Company a worldwide, non-exclusive, royalty-free, sublicensable, and transferable license to use, reproduce, distribute, create derivative works of, display, and perform such content. This license survives even after you delete your account.
- The Company may use User-Generated Content for providing the App, improving it, advertising and marketing, or developing new services.
- If the Company determines that User-Generated Content violates the Terms, the Company may delete such content without notice to you.
Article 7 (Disclaimers)
- The Company makes no warranty as to the accuracy, completeness, usefulness, or fitness for a particular purpose of AI Coach responses. AI Coach responses are not a substitute for professional advice and are provided for educational and entertainment purposes. You use AI Coach responses at your own risk, and the Company shall not be liable for any damages arising from reliance on such responses. The Company does not guarantee learning outcomes.
- The Company makes no warranty that the App will fit your specific purpose, provide expected functions or value, be accurate or useful, comply with laws or internal rules of industry organizations applicable to you, be available continuously, or be free of defects.
- The Company shall not be liable for any damages caused by the suspension, failure, or interruption of the App.
- You shall manage your own health condition at your own responsibility, and the Company shall not be liable for any health risks from long practice sessions.
Article 8 (Suspension and Termination)
-
If you fall under any of the following, the Company may delete User-Generated Content,
temporarily suspend your use of the App, or delete your account without prior notice or
demand.
- If you violate any provision of the Terms
- If it is found that registered information contains falsehoods
- If you become insolvent or if a petition is filed for bankruptcy, civil rehabilitation, corporate reorganization, special liquidation, or similar proceedings
- If you do not respond for 30 days or more to inquiries or other communications from the Company requesting a response
- Any other case where the Company deems continued use of the App or continuation of the account inappropriate
- In any of the cases in the preceding paragraph, you shall automatically lose the benefit of time for all obligations owed to the Company and must immediately pay all such obligations.
Article 9 (Changes to the Terms)
The Company may change the Terms if deemed necessary. When changing the Terms, the Company will notify users of the effective date and contents of the revised Terms by posting in the App or by other appropriate methods, or by directly notifying users. If user consent is required under laws and regulations, the Company will obtain such consent by a method prescribed by the Company.
Article 10 (Minors)
- If you are under 13 years of age, you may not use the App. The Company does not intentionally collect personal information from users under 13.
- If you are a minor aged 13 or older but under 18, please use the App with the consent of a legal guardian such as a parent. By agreeing to the Terms and starting to use the App, you are deemed to have obtained the guardian’s consent.
Article 11 (Governing Law and Jurisdiction)
- The Terms and the service usage agreement shall be governed by the laws of Japan.
- The Tokyo District Court shall have exclusive jurisdiction as the court of first instance over any dispute arising out of or relating to the Terms or the service usage agreement.
Article 12 (Contact)
For inquiries about the Terms, please contact:
DOTNULL Co.,Ltd
support@morse-link.com