These Terms of Use (the “Terms”) govern the download, installation, access to, and use of mobile applications published under the Zen Series brand by the developer of the Zen Series applications (the “Developer”) that link to these Terms (collectively, the “Apps”).
By downloading, installing, accessing, purchasing, subscribing to, or using an App, you agree to these Terms.
If you do not agree to these Terms, do not use the Apps.
1. Scope
These Terms apply to all Zen Series Apps that link to these Terms from their app store listing, in-app settings, or another official location.
The functions, free features, premium features, advertising, purchase options, subscription options, and other specifications of each App may differ.
Additional terms or notices displayed within a specific App may apply to functions unique to that App. If such additional terms conflict with these Terms regarding a specific function, the more specific terms will apply to that function to the extent permitted by applicable law.
2. License to Use the Apps
Subject to these Terms and the rules of the applicable app store, the Developer grants the user a limited, personal, non-exclusive, non-transferable, non-sublicensable, and revocable license to use the Apps for lawful personal purposes.
The Apps are licensed, not sold, except for any rights expressly granted under applicable law.
The user does not acquire ownership of the Apps, source code, designs, trademarks, logos, documentation, or other intellectual property by downloading, purchasing, subscribing to, or using an App.
3. User Responsibilities
Users are responsible for:
Using the Apps in accordance with applicable laws and these Terms.
Maintaining their devices, operating systems, network connections, accounts, and app store settings as necessary to use the Apps.
Reviewing information entered into the Apps and maintaining appropriate backups where necessary.
Managing device permissions, notifications, storage, and other operating system settings.
Keeping backup or exported files secure.
Managing purchases and subscriptions through the applicable app store.
Users are responsible for determining whether an App is suitable for their particular purpose.
4. Prohibited Conduct
Users must not:
Use the Apps for unlawful, fraudulent, abusive, or harmful purposes.
Interfere with or disrupt the operation, security, integrity, or availability of the Apps.
Attempt to bypass purchase restrictions, premium feature restrictions, licensing controls, advertising systems, or other technical limitations.
Modify, reproduce, distribute, resell, sublicense, or commercially exploit the Apps except where expressly permitted by applicable law.
Reverse engineer, decompile, disassemble, or attempt to derive source code except to the extent such restriction is prohibited by applicable law.
Use automated systems or other methods to interfere with the Apps or related third-party services.
Use the Apps in a manner that infringes intellectual property rights, privacy rights, or other rights of the Developer or any third party.
Attempt to access data, systems, services, or functionality that the user is not authorized to access.
5. Free Features and Premium Features
Some Apps may provide both free and premium functionality.
The functions available without payment and the functions requiring a purchase or subscription are determined separately for each App and may be described within the App or its app store listing.
Free versions of some Apps may include advertisements, usage limits, feature limits, or other reasonable restrictions.
Premium features may include removal of advertisements, increased limits, backup functionality, customization features, additional functionality, or other benefits specified within the relevant App.
6. One-Time Purchases
Some Apps may offer premium functionality through a one-time in-app purchase.
A one-time purchase provides access to the functionality described at the time of purchase, subject to these Terms, the applicable App specifications, and the rules of the applicable app store.
A one-time purchase does not guarantee that the App, operating system, device platform, or third-party services will remain available indefinitely.
Purchase restoration may be available where supported by the applicable app store, device platform, and App.
7. Auto-Renewable Subscriptions
Some Apps may offer premium functionality through auto-renewable subscriptions.
The subscription period, price, included functionality, and other applicable conditions will be displayed through the App or the applicable app store before purchase.
Unless canceled in accordance with the procedures of the applicable app store, subscriptions may automatically renew for additional subscription periods.
Subscription payments, renewals, billing dates, payment methods, cancellations, and related account management are handled by the applicable app store.
Users are responsible for managing or canceling subscriptions through the subscription management functions provided by the applicable app store.
Cancellation generally stops future renewals and does not immediately terminate access for a subscription period that has already been paid for, subject to the rules of the applicable app store and applicable law.
Deleting an App does not necessarily cancel an active subscription.
8. Free Trials and Introductory Offers
Some subscriptions may include a free trial, introductory price, promotional offer, or other limited-time offer.
Where such an offer is available, the applicable duration, eligibility requirements, renewal price, and other conditions will be displayed before purchase.
Unless canceled before the end of the applicable trial or promotional period in accordance with the procedures shown by the applicable app store, a subscription may convert to a paid subscription and renew at the price displayed at the time of enrollment.
Eligibility for trials and promotional offers may be determined by the applicable app store, the Developer, or the applicable purchase platform.
9. Prices and Changes
Prices for Apps, one-time purchases, subscriptions, and other paid functionality may vary by platform, country, region, currency, tax treatment, or app store.
The Developer may change prices for future purchases or subscription periods where permitted by applicable law and app store rules.
Any price change affecting an existing subscription will be handled in accordance with the applicable app store’s procedures, including any notice or user consent required by that platform or applicable law.
10. Payments and Refunds
Payments are processed by the applicable app store.
The Developer does not directly process users’ credit cards, bank accounts, or other app store payment credentials.
Except where required by applicable law or the policies of the applicable app store, completed payments are non-refundable.
Refund requests, billing disputes, charge corrections, and similar payment matters are generally handled through the applicable app store in accordance with its policies and procedures.
Nothing in these Terms limits any refund, cancellation, withdrawal, or other consumer right that cannot legally be waived.
11. Advertising
Some Apps may display advertisements, particularly where the user is using a free version or has not activated applicable premium functionality.
Advertisements may be provided by third-party advertising services such as Google AdMob.
The Developer does not necessarily control the specific advertisements displayed by third-party advertising networks.
Where an App provides advertisement removal as a premium benefit, advertisements are generally hidden while the applicable premium entitlement remains valid.
Technical components associated with advertising services may remain integrated into the App even when advertisements are not displayed.
12. User Data and Local Storage
Many Zen Series Apps are designed to store user-created data primarily on the user’s device.
Unless expressly stated otherwise within a specific App, the Developer does not provide a server-based storage service for user-created App content.
Users are responsible for managing data stored on their device and for creating backups where appropriate.
Deleting an App, clearing App data, resetting or replacing a device, operating system problems, device failure, storage corruption, user error, or third-party service problems may result in loss of locally stored information.
To the extent permitted by applicable law, the Developer is not responsible for loss of user data resulting from circumstances outside the Developer’s reasonable control.
The handling of information is further described in the Application Privacy Policy.
13. Backup, Export, and Import
Some Apps may provide backup, export, or import functionality.
Users are responsible for safely storing exported files and verifying that backups have been successfully created.
The Developer does not guarantee that a backup file will remain compatible with every future App version, device, operating system, or third-party storage service.
Users should not rely on a single copy of important information where loss of that information could cause significant damage.
14. Notifications and Time-Sensitive Functions
Some Apps may provide notifications, reminders, timers, scheduled events, counters, routines, or other time-related functionality.
Such functionality may depend on operating system behavior, permissions, battery optimization, device status, network conditions, time-zone settings, background execution restrictions, or other circumstances outside the Developer’s control.
The Developer does not guarantee that notifications, reminders, or other time-sensitive functions will always occur at an exact time or will always be delivered.
Users should not rely solely on an App for emergencies, medical treatment, personal safety, legal deadlines, financial deadlines, or other circumstances where failure or delay could result in significant harm.
15. Third-Party Services
The Apps may interact with or depend on services provided by third parties, including Apple, Google, RevenueCat, Google AdMob, operating system providers, device manufacturers, cloud storage providers, and other service providers.
The availability, operation, policies, pricing, and specifications of third-party services are controlled by their respective providers.
The Developer is not responsible for changes, interruptions, restrictions, termination, errors, or other actions of third-party services outside the Developer’s reasonable control.
Use of a third-party service may be subject to separate terms and privacy policies established by that provider.
16. External Websites and Content
An App may contain links to external websites, feeds, resources, stores, or other third-party content.
The Developer does not control and does not necessarily endorse third-party websites or content solely because an App provides access to them.
Users access external resources at their own discretion and are responsible for reviewing the applicable terms, privacy policies, and risks associated with those services.
17. Intellectual Property
All rights, title, and interest in the Apps, including software, source code, interfaces, designs, graphics, logos, trademarks, documentation, and other materials created by or for the Developer, remain with the Developer or the applicable rights holder.
“Zen Series” and the names, logos, and branding of individual Apps may not be used in a manner that falsely implies endorsement, partnership, sponsorship, or authorization by the Developer.
Third-party trademarks, service names, content, and intellectual property remain the property of their respective owners.
18. App Updates and Changes
The Developer may modify, update, add, restrict, replace, suspend, or remove App functions where reasonably necessary for development, maintenance, security, compliance, platform changes, business reasons, or other legitimate purposes.
The Developer does not guarantee that every feature will remain unchanged or available indefinitely.
Updates may be necessary for compatibility with newer versions of operating systems, app store requirements, third-party SDKs, or device platforms.
Older versions of an App may cease to function correctly or may no longer be supported.
19. Availability and Discontinuation
The Developer may suspend or discontinue distribution, development, maintenance, or availability of an App where reasonably necessary.
The Developer does not guarantee continuous or uninterrupted availability of any App.
Where a third-party platform, operating system, app store, SDK, API, or service becomes unavailable or changes its specifications, some App functionality may become limited or unavailable.
Any rights that users may have in connection with paid products upon discontinuation remain subject to applicable law and the rules of the applicable app store.
20. No Guarantee of Support
The Developer may provide documentation, updates, contact channels, or other assistance at the Developer’s discretion.
Unless expressly agreed otherwise, the purchase or use of an App does not entitle the user to individualized technical support, response within a particular period, continuous maintenance, custom development, or implementation of requested features.
The availability of a contact form does not constitute a guarantee that every inquiry will receive an individual response.
21. Disclaimer of Warranties
To the maximum extent permitted by applicable law, the Apps are provided on an “as is” and “as available” basis.
The Developer does not guarantee that:
An App will meet every user’s individual requirements.
An App will operate without interruption, delay, error, or defect.
All information generated, displayed, imported, or processed by an App will always be complete or accurate.
An App will remain compatible with every future device or operating system version.
Third-party services used by an App will remain continuously available.
User data can always be recovered after loss, deletion, corruption, device failure, or other events.
Nothing in these Terms excludes warranties or statutory rights that cannot legally be excluded.
22. Limitation of Liability
To the maximum extent permitted by applicable law, the Developer will not be liable for indirect, incidental, consequential, special, punitive, or similar damages arising from or relating to the Apps, including loss of data, loss of profits, loss of business opportunities, or inability to use an App.
The Developer is not responsible for damage caused by events outside the Developer’s reasonable control, including device failure, operating system behavior, network outages, app store failures, third-party service failures, unauthorized device access, or user error.
Nothing in these Terms excludes or limits liability where such exclusion or limitation is prohibited by applicable law.
In particular, any limitation of liability contained in these Terms applies only to the extent permitted under applicable consumer protection law and does not exclude liability for intentional misconduct or gross negligence where such exclusion is prohibited.
23. Suspension or Termination of Use
The Developer may restrict or terminate a user’s right to use an App where the user materially violates these Terms, engages in fraudulent or unlawful activity, interferes with the App or related services, or where restriction is otherwise reasonably necessary to protect the Developer, users, or third parties.
Sections that by their nature should survive termination, including provisions concerning intellectual property, disclaimers, limitation of liability, and governing law, will continue to apply after termination.
24. Changes to These Terms
The Developer may revise these Terms in response to changes in the Apps, business operations, platform rules, third-party services, applicable laws, or other circumstances.
Updated Terms become effective when published on the official Zen Series website or otherwise made available through the relevant App, unless a later effective date is stated.
Where applicable law requires notice or consent regarding a material change, the Developer will provide such notice or obtain such consent using an appropriate method.
Continued use of an App after revised Terms become effective constitutes acceptance of the revised Terms to the extent permitted by applicable law.
25. Governing Law and Jurisdiction
These Terms are governed by the laws of Japan, without regard to conflict-of-law principles.
To the extent permitted by applicable law, disputes arising from or relating to these Terms or the Apps will be subject to the exclusive jurisdiction of the Tokyo District Court as the court of first instance.
However, this provision does not deprive users of protections, rights, remedies, or jurisdictional rights that cannot be waived under mandatory consumer protection or other applicable laws in the user’s country or region.
26. Severability
If any provision of these Terms is found to be invalid, illegal, or unenforceable, that provision will be limited or modified to the minimum extent necessary, and the remaining provisions will remain in full force and effect to the extent permitted by applicable law.
27. No Waiver
Failure by the Developer to enforce any provision of these Terms does not constitute a waiver of that provision or any other right.
28. Contact
Questions regarding these Terms or the Apps may be submitted through the following form:
