Terms of Use - “Structree”

Last updated: 2026/05/11

These Terms of Use (“Terms”) govern your use of the mobile application “Structree” (the “App”). The App is provided by the individual or entity that publishes the App on the Apple App Store, Google Play Store, or other distribution platforms (“we”, “us”, or “our”).

By downloading, installing, accessing, or using the App, you (“you” or “user”) agree to be bound by these Terms. If you do not agree to these Terms, you must not use the App.

1. Eligibility and Use of the App

1.1. Age requirement

You must be at least 13 years old, or the minimum age required in your country or region, to use the App. If you are under the age of majority in your jurisdiction, you may only use the App with the consent of your parent or legal guardian.

1.2. Personal, non-commercial use

The App is provided for your personal, non-commercial use only. You may not use the App for any commercial, professional, enterprise, or mission-critical purpose unless you have obtained our prior written consent.

2. Description of the App

2.1. Overview

The App is a local-first structured thinking application. It is designed to help you organize ideas, notes, information, plans, concepts, and other personal content using structured views such as World, Pyramid, and Tree.

The App may include features such as:

• World, Pyramid, and Tree views for organizing information;
• text-based notes, blocks, nodes, titles, and descriptions;
• hierarchical or structured relationships between items;
• optional image insertion for supporting visual context;
• local editing, reordering, deletion, and organization of content;
• settings, legal links, support links, and maintenance features;
• image cleanup or data maintenance features where available;
• advertisements, promotional banners, or paid features where available.

2.2. No account registration

At the time these Terms are published, the App does not require user registration or login. The App is primarily designed to operate locally on your device.

2.3. Local storage and data loss

Content you enter into the App, including text, structures, notes, images, and related metadata, is generally stored locally on your device, unless otherwise indicated within the App. We do not guarantee that your content will be backed up, synchronized, recoverable, or available on other devices.

Your content may be lost if, for example, you delete the App, reset the local database, clear app data, lose or damage your device, change devices, reinstall the App, delete files, run maintenance or cleanup functions, or experience a software or device failure. You are responsible for maintaining any backup or separate record of content that is important to you.

2.4. Images and storage

The App may allow you to add images to support your notes or structures. Image files may increase the amount of storage used on your device. You are responsible for managing your device storage and for ensuring that you have the right to use any images you add to the App.

2.5. No professional advice

The App is a general-purpose thinking, note-taking, and organization tool. It does not provide medical, psychological, legal, financial, business, educational, or other professional advice. You must not rely on the App as the sole basis for making important health, safety, financial, legal, business, academic, or personal decisions.

3. In-App Purchases and Payments

3.1. Paid features

The App may offer paid features, subscriptions, non-consumable purchases, or other in-app purchases, such as removing advertisements, unlocking additional capacity, or enabling premium features. The exact product name, price, currency, duration, and available purchase options are displayed within the App and/or in the applicable app store.

3.2. Payment processing by app stores

All payments and billing for in-app purchases are handled by the Apple App Store, Google Play Store, or other platform providers (each a “Store”). We do not directly process or store your payment card or billing information. Your purchases are subject to the applicable Store’s terms, conditions, and policies.

3.3. License granted by purchase

When you successfully complete an in-app purchase, you obtain a personal, non-transferable, non-exclusive, revocable license to use the corresponding feature within the App, subject to these Terms and the applicable Store’s rules.

3.4. Availability of purchased features

We may change, suspend, or discontinue in-app products and pricing at any time. If you have previously purchased a non-consumable product, we will make reasonable efforts to keep that entitlement available to you as long as the App is offered, subject to technical, device, account, platform, regional, and Store-related limitations.

3.5. Refunds

Unless otherwise required by applicable law or the applicable Store’s policies, all in-app purchases are final and non-refundable. Any refund requests must be made directly to the applicable Store and are handled under that Store’s refund rules.

3.6. Restore purchases

If the App provides a “Restore”, “Restore Purchases”, or similar feature, it is intended to allow you to re-activate previously purchased non-consumable products on a new device or after reinstallation, using the same Store account. We do not guarantee successful restoration in all cases, including where you use a different Store account, change platforms, or where Store or device limitations apply.

4. Advertisements and Promotional Banners

4.1. Third-party advertising

The App may display third-party advertisements, for example through Google AdMob or similar advertising services. These ads are provided by third-party partners, and we do not control the specific content of each advertisement.

4.2. Ad removal

If the App offers and you purchase a Remove Ads product or similar paid feature, we will make reasonable efforts to suppress third-party advertisements within the App for your usage on the applicable Store account and platform, subject to technical, account, platform, regional, and Store-related limitations.

Depending on the App version, a paid ad-removal feature may also hide optional promotional banners placed directly by us within the App. However, functional links, legal notices, support links, settings items, purchase status messages, and other non-advertising UI elements may continue to appear.

4.3. Third-party terms

Your interactions with third-party ads, websites, apps, products, or services are solely between you and the relevant third party. We are not responsible for any loss or damage arising from such interactions.

4.4. External links and developer promotions

From time to time, the App may display optional banners, buttons, or links that direct you to websites, app store pages, products, or services provided by us or by third parties. Any access to or use of third-party sites or services is at your own risk and is governed by the third party’s terms, policies, and practices.

5. Acceptable Use and Prohibited Activities

When using the App, you agree not to:

• use the App for any unlawful purpose or in violation of any local, national, or international law;
• attempt to reverse engineer, decompile, disassemble, or otherwise derive the source code of the App, except where explicitly permitted by applicable law;
• copy, modify, distribute, sell, lease, sublicense, or exploit any part of the App except as permitted by these Terms;
• interfere with, disrupt, damage, overload, or impair the App or any services connected to the App;
• attempt to circumvent any technical measures used to protect the App or to enforce purchase, license, or usage limitations;
• use the App in any manner that could harm, exploit, harass, or unduly influence minors or vulnerable individuals;
• enter, store, generate, copy, share, or transmit content that is illegal, infringing, abusive, threatening, defamatory, discriminatory, obscene, or otherwise objectionable;
• add images, text, or other content that infringes the rights of any third party, including copyright, trademark, privacy, publicity, or other intellectual property rights; or
• use the App as part of a system where failure of the App could lead to death, personal injury, severe property damage, or other critical harm.

We reserve the right, but have no obligation, to take appropriate action if you violate these Terms, including restricting your access to the App, disabling features, or discontinuing the App.

6. Intellectual Property

6.1. Our rights

All intellectual property rights in and to the App, including but not limited to the software, design, text, graphics, logos, icons, images, user interface, and other content provided by us, are owned by us or our licensors and are protected by copyright, trademark, and other laws.

6.2. Limited license

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to install and use the App on devices that you own or control, solely for your personal, non-commercial use.

6.3. User content

To the extent the App allows you to enter, create, edit, store, import, or manage text, notes, images, structures, nodes, titles, descriptions, metadata, or other content (“User Content”), you retain any rights you may have in your User Content. We do not claim ownership of your User Content.

You are solely responsible for your User Content and for ensuring that your use of the App and your User Content comply with applicable laws and these Terms.

7. Privacy and Data Protection

7.1. Privacy Policy

Our handling of personal data in connection with the App is described in our Privacy Policy, which is available at: Privacy Policy.

By using the App, you acknowledge that you have read and understood our Privacy Policy.

7.2. Local-first design

The App is designed primarily as a local-first application. However, certain third-party services, such as app stores, advertising networks, purchase systems, external websites, external browsers, or operating system functions, may process information according to their own terms and privacy policies.

8. Disclaimers

8.1. “As is” and “as available”

The App is provided on an “as is” and “as available” basis. To the maximum extent permitted by applicable law, we make no warranties, representations, or guarantees of any kind, whether express, implied, or statutory, including but not limited to warranties of merchantability, fitness for a particular purpose, non-infringement, reliability, availability, accuracy, or data preservation.

8.2. No guarantee of organization, thinking quality, or results

We do not guarantee that using the App will improve your thinking, creativity, productivity, organization, planning, memory, academic performance, work performance, decision-making, or any other aspect of your activities.

8.3. No guarantee of uninterrupted operation

We do not guarantee that the App will be uninterrupted, error-free, secure, compatible with all devices or operating systems, or free from data loss, defects, or harmful components.

9. Limitation of Liability

To the maximum extent permitted by applicable law:

• we shall not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, including but not limited to loss of profits, revenue, data, goodwill, opportunity, business, ideas, notes, images, structures, or other content, arising out of or in connection with your use of or inability to use the App; and
• our total aggregate liability arising out of or relating to the App or these Terms shall not exceed the amount you actually paid, if any, for in-app purchases during the twelve (12) months preceding the event giving rise to the claim, or the minimum amount required by law if such limitation is not permitted.

Some jurisdictions do not allow the exclusion or limitation of certain warranties or damages. In such cases, the above exclusions and limitations apply only to the extent permitted by the laws of your jurisdiction.

10. Third-Party Services and Platform Terms

10.1. Third-party services

The App may rely on or interact with third-party services and libraries, including but not limited to app distribution platforms, in-app purchase systems, advertising networks, crash or diagnostic tools where applicable, device operating system functions, photo libraries, external browsers, and system sharing features. Your use of those services may be subject to additional terms and privacy policies issued by the respective third parties.

10.2. Apple and Google

These Terms are between you and us only, and not with Apple Inc., Google LLC, or their affiliates. Neither Apple nor Google is responsible for the App or its content. However, Apple and its subsidiaries are third-party beneficiaries of these Terms if you obtained the App through the Apple App Store, and Google and its subsidiaries are third-party beneficiaries of these Terms if you obtained the App through Google Play.

Upon your acceptance of these Terms, Apple and Google shall have the right, and will be deemed to have accepted the right, to enforce these Terms against you as third-party beneficiaries to the extent applicable.

11. Changes to the App and to These Terms

11.1. App updates and discontinuation

We may update, modify, suspend, or discontinue the App or any part of it at any time, temporarily or permanently, with or without notice, and without liability to you, except where prohibited by applicable law.

11.2. Changes to these Terms

We may update these Terms from time to time. When we do so, we will update the “Last updated” date at the top of this document. If the changes are material, we may also provide additional notice, such as within the App or on our website.

By continuing to use the App after the updated Terms become effective, you agree to be bound by the revised Terms.

12. Governing Law and Jurisdiction

Unless otherwise required by the law of your country or region of residence, these Terms shall be governed by and construed in accordance with the laws of Japan, without regard to its conflict of law principles.

Any disputes arising out of or in connection with the App or these Terms shall be subject to the non-exclusive jurisdiction of the courts of Japan, unless the law of your country or region of residence requires otherwise.

13. Severability

If any provision of these Terms is held to be invalid, illegal, or unenforceable under applicable law, that provision shall be enforced to the maximum extent permissible, and the remaining provisions shall remain in full force and effect.

14. Contact

If you have any questions about these Terms or the App, please contact us through the support page:

Website: Support