Terms of Use

Last updated: 2026-10-10 / Effective date: 2026-10-10

Japanese version prevails

In case of any discrepancy between the Japanese version of these Terms and any other language version (such as this English version), the Japanese version shall prevail. This does not limit consumer protection rights or mandatory language rules under applicable law.

Article 1 Scope

  1. These Terms of Use apply to all relationships concerning the use of the smartphone application “Shuffleep” (hereinafter “the Service”) provided by TO Apps (hereinafter “the Operator”). The Operator’s business information is stated in the Notice Based on the Act on Specified Commercial Transactions (referred to in the app as the “Legal Notice”; available in Japanese only).
  2. These Terms are standard terms of contract (teikei yakkan) under Article 548-2 of the Civil Code of Japan. By agreeing on the consent screen shown when the Service is first launched, the User agrees to all provisions of these Terms, and these Terms become the content of the usage agreement. Users who do not agree to these Terms may not use the Service.
  3. If the Operator offers an iOS version of the Service, the license for that application is governed by the Apple Standard EULA. These Terms supplement the conditions for services provided by the Operator; the Standard EULA prevails to the extent of a conflict. Article 14 does not change the governing law or jurisdiction applicable to the relationship with Apple under that EULA. Mandatory consumer rights remain unaffected.
  4. For the Android version of the Service, these Terms also serve as the end user license agreement between the User and the Operator.

Article 2 Description of the Service

  1. The Service is an application that provides sleep-induction sessions centered on the Cognitive Shuffle Sleep Method. Sessions can be configured by optionally combining “Meditation (introduction)” and “Word Shuffle (core feature).”
  2. The features of the Service are classified into Free features, which are available without additional charge, and Premium features, which are available through a subscription (or a code under Article 5-2). The scope of features included in each is as displayed within the application, and the Operator may change it. However, if the Operator reduces the scope of Premium features in a way that is disadvantageous to Users with an active subscription, the Operator will notify those Users in advance within the Service of the details of the change and how to cancel. The reduction applies from the billing period that begins on the first renewal date after a reasonable period following the notice, long enough for Users to review the change and cancel. If the Operator unavoidably reduces the scope during a paid period in a case falling under Article 10, paragraph 3, this is treated as a case where the paid period cannot be provided under Article 5, paragraph 8, and the Operator will provide the remedies set forth in that paragraph.

Article 3 Account / User Identification

  1. The Service has no account registration or login. Purchases and restores use the User’s Apple ID (on iOS) or Google Play account (on Android).
  2. Identifiers used to determine purchase status, and other information, are handled as described in the Privacy Policy.
  3. Users are responsible for managing their Apple ID / Google Play accounts appropriately. The Operator’s liability for damage arising from unauthorized use is governed by Article 8, paragraphs 10 and 11.

Article 4 Use by Minors

  1. Persons under 13 may not use the Service.
  2. Where the Service is used with a U.S. Google Play account, if the age information provided by Google Play indicates that a User is aged 13 to 17 and that the information is based solely on the User’s own declaration (not on supervision by a parent or guardian or on age verification), the User may not use the Service.
  3. If a User is a minor, the User shall obtain the prior consent of a legal representative (such as a parent or guardian) before using the Service, including before subscribing.
  4. The Operator itself does not perform age verification. However, the Operator may restrict use of the Service based on age signals provided by app stores such as Google Play. For devices that may be used by minors, the Operator recommends restricting in-app purchases using parental control features such as Apple “Screen Time” or Google “Family Link.”

Article 5 Subscription / Billing

  1. To use Premium features, Users must subscribe to either the monthly plan or the annual plan, except where Premium features are provided via a code under Article 5-2. At present, both plans grant the same features.
  2. No free trial period is offered. Billing starts as soon as the subscription is confirmed.
  3. The sale price is the one shown during the purchase flow and on the Apple App Store / Google Play store listing. Prices for Japan are stated in the Notice Based on the Act on Specified Commercial Transactions (available in Japanese only).
  4. Fees are charged automatically at the following timing.
    • iOS: Automatically charged through the App Store subscription system using the payment method linked to the User’s Apple ID.
    • Android: Automatically charged through the Google Play subscription system using the payment method linked to the User’s Google Play account.
  5. Subscriptions renew automatically every month or year, according to the plan, until canceled. To stop the next renewal, check the renewal date and deadline displayed by the store where the purchase was made and cancel by that deadline. The App Store may charge for the next period within 24 hours before the current period ends. For Google Play, cancel before the next renewal.
  6. How to cancel: Subscriptions can be canceled from the subscription management screen of the store where the purchase was made (App Store / Google Play). For instructions, see each store’s official help (Apple instructions / Google Play instructions).
  7. After ordinary cancellation, Premium remains available until the end of the paid period. Partial-period refunds are generally unavailable for ordinary cancellation, subject to the exceptions and remedies in the following paragraph. Uninstalling the app or deleting data does not cancel a subscription.
  8. Refund requests are normally processed through the Apple App Store or Google Play where the purchase was made. Store policies do not limit rights to cancellation, termination, refunds, damages or other remedies required by applicable law. Where the paid period cannot be provided because of nonperformance attributable to the Operator, a breach of contract by the Operator, or termination of the Service, requests are also accepted at the contact in Article 15, and the Operator will provide the remedies required by law, including refunds for the unprovided period.
  9. The Operator may revise the fees for the Service. Any revision will be applied from the billing period beginning on or after the first renewal date following prior notice given in accordance with the procedures prescribed by the Apple App Store or Google Play. Users who do not agree to the revised price should cancel before that renewal date.
  10. A subscription is tied to the store account used for the purchase and may not be available in the Service on another store (another operating system).

Article 5-2 Provision of Premium Features via Codes

  1. The Operator may, at its discretion, provide Premium features free of charge for a specified period to Users who enter a code issued by the Operator within the Service. Codes can be entered only where the Service supports code entry.
  2. The provision of Premium features under this Article does not constitute a subscription. No fees will be charged, and there is no automatic renewal; the provision automatically ends upon expiration of the period. The period of provision is the maximum duration specified for each code and may be shortened due to the expiration of the code’s validity period. The end date of the provision can be checked within the Service once the Premium entitlement has been applied.
  3. Codes are issued free of charge and are not for sale. Users shall not transfer, resell, exchange for cash, or lend codes to any third party. The Operator may invalidate, without prior notice, any code that has been improperly obtained, distributed, or otherwise reasonably deemed inappropriate by the Operator.
  4. The Operator determines the validity period, redemption limit, and maximum duration of provision for each code. Codes that have passed their validity period or reached their redemption limit cannot be used.
  5. If a User is already using Premium features (including during an active subscription or an active period under this Article), the User cannot apply a code to extend the period or apply it on top of the current period. Each time a code is applied, one redemption is consumed.
  6. To the extent permitted by applicable law, the Operator may suspend, terminate, or modify the acceptance of codes without prior notice. Unless invalidated pursuant to paragraph 3, Premium features that have already been validly applied prior to suspension will remain accessible until the end of their applicable provision period.

Article 6 Prohibited Conduct

  1. Users must not:
    1. Reverse engineer, decompile or disassemble beyond what applicable law or relevant open-source licenses permit;
    2. Copy, redistribute or sell audio, word or other data without permission or a legal basis;
    3. Improperly burden the Service or third-party infrastructure through excessive requests or similar conduct;
    4. Falsify purchase information or otherwise obtain paid features fraudulently;
    5. Unlawfully disclose third-party personal information or confidential information;
    6. Spread false statements of fact, threaten others, infringe others’ rights or engage in other unlawful conduct;
    7. Violate applicable export or re-export laws; or
    8. Engage in conduct that materially interferes with the normal provision of the Service.

    This paragraph does not prohibit legitimate reviews, criticism, word-of-mouth comments, complaints, consultations with or reports to government authorities, or legally permitted quotations.

  2. If the Operator determines that a User has engaged in any act falling under any item of the preceding paragraph, the Operator may, without prior notice, request that the act be stopped, suspend the User’s use of the Service, or terminate the usage agreement.
  3. Damages arising from the measures under the preceding paragraph and paragraph 5 are governed by Article 8, paragraphs 10 and 11. Where these measures are taken because of a User’s breach (conduct under any item of paragraph 1, or a breach of the representation and warranty in paragraph 5), the Operator will not refund fees already paid, except where a refund is required by applicable law. If the User has committed no such breach, refunds and other remedies are governed by Article 5, paragraph 8.
  4. If a User causes damage to the Operator through an act that violates paragraph 1 of this Article, the User is liable for that damage.
  5. Users represent and warrant that they are not members of organized crime groups (boryokudan) or other antisocial forces. If the Operator determines that a User has breached this representation, the Operator may terminate the usage agreement without prior notice. Damages and the handling of fees already paid relating to such termination are governed by paragraph 3.

Article 7 Intellectual Property Rights

  1. Copyrights, trademark rights, and all other intellectual property rights relating to the programs, word data, audio files, narration scripts, text, images, videos, trademarks, and all other content contained in the Service (hereinafter “the Content”) belong to the Operator or the rightful holders.
  2. Subject to these Terms, the Operator grants the User a non-exclusive, non-transferable, and non-sublicensable right to use the Service and the Content solely for private purposes. Users do not acquire ownership or intellectual property rights to the Content and may not use the Content beyond the scope set out in these Terms.
  3. The license set out in the preceding paragraph terminates when the usage agreement is terminated under Article 6, paragraph 2 or otherwise ends, and is suspended while the User’s use of the Service is suspended under Article 6, paragraph 2. However, this does not apply to use of the app itself that is permitted to the User under the terms of the app store.
  4. The Operator acquires no rights in Custom Word Sets created by Users within the Service, including their names and the selection and arrangement of words. However, rights in the word data, audio and other Content included in Custom Word Sets remain governed by paragraphs 1 and 2.
  5. Custom Word Sets are stored on the device and may be lost following device replacement, reset or app deletion. The Operator does not provide server storage of Custom Word Sets or their transfer between devices. OS backups are addressed in the Privacy Policy. The Operator’s liability is governed by Article 8, paragraphs 10 and 11.
  6. Users must not enter content that infringes others’ rights, or unnecessary personal information, in Custom Word Set names. The Operator does not ordinarily receive or review their contents. Liability is governed by Article 8, paragraphs 10 and 11.

Article 8 Health and Safety Notices / Disclaimer

  1. The Service is not a medical device and does not provide medical care or treatment. It is not intended for the diagnosis, treatment, or prevention of insomnia, sleep disorders, or any other disease.
  2. The effects of the Service vary from person to person, and there is no guarantee that all Users will experience the same results.
  3. The Service is provided for entertainment and wellness purposes to assist with sleep induction. Users experiencing persistent sleep issues are encouraged to consult a healthcare professional.
  4. If you experience dizziness, headache, nausea, convulsions, or any other physical abnormality while using the Service, stop using it immediately and consult a healthcare professional as necessary.
  5. The Service displays visuals that involve changes in brightness and motion. In rare cases, a very small number of people may experience adverse physical reactions (including seizures) to such visuals. If you have previously experienced such symptoms, or have been told that you are photosensitive, consult a physician before use. Use the Service in a well-lit place and keep a sufficient distance from the screen.
  6. Never use the Service while driving a car or bicycle, operating machinery, or in any situation where drowsiness would be dangerous. The Service is intended to support sleep onset, and use in these circumstances may cause serious accidents.
  7. Connectivity, devices, operating systems, maintenance or third-party outages may temporarily prevent access to all or part of the Service.
  8. The Operator responds to inquiries and defects according to their nature. No response time, uptime or repair deadline is guaranteed.
  9. The Operator is not liable for damage suffered by Users where provision of the Service is prevented by causes not attributable to the Operator, such as natural disasters, laws or orders of public authorities, or failures of telecommunications networks, cloud services or app stores.
  10. Where the Operator is liable for damages for nonperformance of obligations or in tort and the cause is limited to the Operator’s ordinary negligence (that is, neither intentional misconduct nor gross negligence), compensation is limited to ordinary and direct damage. This limitation does not apply to intentional misconduct, gross negligence, injury to life or body, or where applicable law does not permit a limitation.
  11. Regardless of other provisions, these Terms do not exclude or restrict liability or rights to cancellation, termination, refunds or other remedies that cannot be limited under the Consumer Contract Act of Japan or other mandatory law.

Article 9 Advertising

  1. Ads may be displayed in the Service’s free plan (Free), subject to display conditions such as usage. Ads are not displayed while Premium is active.
  2. Purchases and contracts concerning an advertiser’s goods or services are between the User and the advertiser. Liability for the Operator’s own conduct is governed by Article 8, paragraphs 10 and 11.
  3. Information obtained for the delivery and performance measurement of advertisements is handled in accordance with the Privacy Policy.

Article 10 Service Changes / Termination

  1. The availability, features, and design of the Service may change.
  2. The Operator may change the content of the Service, discontinue certain features, or terminate the Service. If the Operator terminates the Service in its entirety, it will endeavor to give at least 30 days’ prior notice within the Service or at a public URL. Reductions in the scope of Premium features are governed by Article 2, paragraph 2, and fee revisions by Article 5, paragraph 9.
  3. Notwithstanding the preceding paragraph, the Operator may suspend or terminate all or part of the Service without prior notice, or without observing the notice period set out in the preceding paragraph, in any of the following cases.
    1. Natural disasters or other events of force majeure
    2. Where maintenance of the Service, response to a failure, or urgent security measures are required
    3. Where a third-party service on which the Service depends, applicable laws and regulations, or app store policies are changed or discontinued
    4. Any other case where the Operator reasonably determines that urgency is required
  4. If the Service ends, the Operator will endeavor to provide it until the paid period expires. Where this cannot be done, the Operator will provide the remedies required by law under Article 5, paragraph 8, including refunds for the unprovided period. The Operator will take the procedures provided by the app stores (such as removing the subscription from sale or canceling subscriptions) so that no renewal charges are made after the Service ends. The termination notice will include instructions to stop subscription renewal and a contact address.

Article 11 Revision of Terms

  1. The Operator may change these Terms without the individual consent of Users, in accordance with Article 548-4 of the Civil Code of Japan, in either of the following cases.
    1. Where the change conforms to the general interests of Users
    2. Where the change does not contradict 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
  2. Before a change takes effect, the Operator will announce that the Terms will change, the revised content and the effective date, by publication at the public URL or another method accessible from the Service’s legal documents.
  3. The notice period will reflect the impact of the change, the time Users need to review it and take necessary action, and legal requirements.
  4. For material revisions (including changes that significantly affect Users’ rights and obligations), the Operator may ask Users to re-consent to these Terms upon first use after the revision.
  5. If the User does not agree to the revised Terms, the User should discontinue use of the Service and cancel the subscription. If the Operator asks Users to re-consent to a revision of these Terms or the Privacy Policy and a User becomes unable to use the Service during a paid period because the User does not agree, this is treated as a case where the paid period cannot be provided under Article 5, paragraph 8, and the Operator will provide the remedies set forth in that paragraph.

Article 11-2 Notices

  1. The Operator gives notices to Users by displaying them within the Service (including through an app update), by posting them at a public URL, or by other methods the Operator considers appropriate. In these Terms, “public URL” means a page about the Service published on the Operator’s website (https://toapps.dev).
  2. A notice is deemed given when it is displayed within the Service or posted at a public URL. However, where these Terms or applicable law specify a different notice method, notice period or effective date, that provision governs. Changes to these Terms take effect on the effective date announced under Article 11, paragraph 2.

Article 12 Severability

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

Article 13 Assignment of Rights and Obligations

  1. Users may not assign, transfer, or pledge as security all or any part of their contractual status or rights and obligations under these Terms to a third party without the Operator’s prior written consent.
  2. If the Operator transfers the business relating to the Service to a third party (including where the business is succeeded through incorporation, merger, company split, or any other cause), the Operator may transfer to that third party its contractual status, rights and obligations under these Terms, and information relating to Users, in connection with that business transfer. Users agree to this paragraph in advance.

Article 14 Governing Law / Jurisdiction

  1. These Terms are governed by and construed in accordance with the laws of Japan.
  2. The Tokyo Summary Court or the Tokyo District Court, depending on the amount in controversy, shall have exclusive jurisdiction as the court of first instance over any disputes arising from or relating to the Service.
  3. The preceding paragraphs and the Japanese-language precedence clause do not exclude mandatory consumer or language rights in the User’s country or region of habitual residence, or rights to bring proceedings in courts available under applicable law. Relationships governed by the Apple Standard EULA are addressed in Article 1, paragraph 3.

Article 15 Contact Information

For inquiries regarding the Service, please contact the following.