Terms of Use

Article 1 (Scope)

1. These Terms apply to all relationships between the Developer and users regarding the use of the App.
2. The handling of information in the App is governed by the separate Privacy Policy.

Article 2 (Service)

The App lets you create flashcards and study with them. Its main features are:

• Creating cards with text, images, and handwriting
• Organizing cards with decks and tags
• Recording study history and suggesting reviews based on the forgetting curve
• Review reminder notifications
• Exporting and importing decks

Article 3 (Minors)

If you are a minor, please use the App with the consent of a parent or guardian. Always obtain their consent before purchasing a paid plan.

Article 4 (Data Storage and Backups)

1. Cards, decks, tags, study history, and other data you create (“User Data”) are stored on your device and in your own iCloud. The Developer does not store User Data.
2. If iCloud is unavailable, User Data is stored only on your device. In that case, User Data may be lost if you delete the App or your device fails.
3. You are responsible for backing up your User Data as needed, for example with the deck export feature.

Article 5 (Content You Create)

1. Rights in User Data belong to you or the rightful owner. The Developer acquires no rights in User Data.
2. You are responsible for making sure your cards do not infringe copyrights or other rights of third parties. If you include third-party works such as books, workbooks, or lecture materials, use them only to the extent permitted by law, such as for private study.
3. If you share an exported deck file with others, make sure you have the right to share its content. You are responsible for resolving, at your own cost, any dispute with a third party arising from such sharing.

Article 6 (Paid Plans)

1. The App is free to use. On the free tier, you can do up to 200 reviews (rating how well you remembered a card) in total.
2. Purchasing a paid plan removes the review limit. Paid plans are available as monthly, yearly, and lifetime plans. Prices are shown on the App’s purchase screen and on the App Store purchase sheet.
3. Payment is made through Apple’s App Store, and Apple’s terms apply.
4. Monthly and yearly plans renew automatically for the same period unless auto-renewal is turned off at least 24 hours before the end of the current period. You can cancel from your Apple Account settings (Subscriptions). After cancellation, you can keep using the paid plan until the end of the paid period.
5. The lifetime plan is a one-time purchase that lets you use paid features for as long as the App continues to be provided. How it is handled after the App is discontinued is set out in Article 9.
6. Refunds follow Apple’s procedures and applicable law. Request a refund through your Apple purchase history or reportaproblem.apple.com.
7. The Developer may change the free tier or the content and prices of paid plans. Changes that are unfavorable to users will be announced in advance in the App or on this website. Such changes will not affect lifetime plans already purchased or subscriptions during a period already paid for.

Article 7 (Prohibited Conduct)

When using the App, you must not:

• Violate laws or public order and morals
• Infringe copyrights, trademarks, privacy, or other rights of third parties
• Reverse engineer or modify the App, or bypass the payment limits by improper means
• Interfere with the operation of the App or related services
• Engage in other conduct that the Developer reasonably considers inappropriate

Article 8 (Intellectual Property)

Rights in the App, this website, characters, logos, designs, and other materials provided by the Developer belong to the Developer or the rightful owners.

Article 9 (Changes, Suspension, and Termination)

1. The Developer may change the App or suspend its provision.
2. The Developer may end the provision of the App. In that case, we will give notice in the App or on this website at least three months before the end date.
3. After announcing the end of the App, we will stop selling new paid plans and make sure subscriptions do not renew beyond the end date.
4. The deck export feature will remain available until the end date so that you can keep your User Data.
5. Even after the App is discontinued, you can keep using the App, including the features of a lifetime plan you have purchased, on devices where it is already installed. However, bug fixes and updates for new OS versions will no longer be provided, so we cannot guarantee how long it will continue to work.
6. The price of the lifetime plan is consideration for using paid features while the App is provided. If the App is discontinued, amounts already paid will not be refunded, except where required by law.

Article 10 (Disclaimers and Limitation of Liability)

1. The Developer does not guarantee that the App will suit any particular purpose (such as passing an exam) or that it is free of defects.
2. The Developer is not liable for damage, including loss of User Data, caused by outages or changes in Apple, iCloud, the App Store, or other third-party services, or by your device or network environment, unless the Developer is at fault.
3. If the Developer is at fault for damage to a user, except in cases of intent or gross negligence, the Developer will compensate only ordinary damage actually incurred, up to the total amount the user paid for the App in the 12 months before the damage occurred.

Article 11 (Changes to These Terms)

1. The Developer may change these Terms when necessary, for example due to changes in law or in the service, in accordance with the Civil Code of Japan.
2. When we change these Terms, we will announce the new content and its effective date on this website or in the App before that date.

Article 12 (Governing Law and Jurisdiction)

1. These Terms are governed by the laws of Japan.
2. Any dispute regarding the App shall be subject to the exclusive jurisdiction of the district court having jurisdiction over the Developer’s place of residence as the court of first instance.

Article 13 (Contact)

For questions about these Terms, please email:

help.kiokuma@gmail.com