HeadUp
Terms of Service

Terms of Service

Please read these Terms of Service carefully before downloading, installing, or using "HeadUp" (the "App"). By using the App, you agree to be bound by these Terms.

Effective date: July 1, 2026 / Last updated: July 1, 2026

Art. 1Definitions and Application

These Terms of Service ("Terms") govern your use of "HeadUp" (the "App"), an iOS application provided by Knightage ("we," "us," or "our").

By downloading, installing, or using the App, you are deemed to have agreed to these Terms and our Privacy Policy. If you do not agree, do not use the App.

"You" or "user" refers to any individual who downloads, installs, or uses the App.

Art. 2About the App

The App uses tilt data from your iPhone's motion sensors to detect possible slouched posture and alert you via notifications and/or vibration.

Important Medical Disclaimer: The App is not a medical device. It is not intended to diagnose, treat, prevent, or improve any medical condition, and it is not a substitute for the advice, diagnosis, or treatment of a physician or other qualified healthcare professional. Detection results are reference information only — accuracy is not guaranteed, and results may differ significantly from your actual posture depending on how the device is held or your usage environment. If you experience pain or discomfort in your neck, shoulders, cervical spine, or eyes, or have any medical concerns about your posture, please consult a healthcare professional rather than relying on the App. The absence of an alert does not mean your posture is medically safe. The App cannot detect all potentially harmful posture patterns, and use of the App does not guarantee prevention of any health condition, including cervical spine conditions (commonly known as "text neck"), muscle strain, or other musculoskeletal issues.

Art. 3License Grant

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to use the App on a compatible iPhone device for personal, non-commercial purposes.

This license does not transfer to you any ownership or other rights in the App's source code, databases, functionality, design, audio, video, or other components.

Art. 4System Requirements

Using the App requires an iPhone running iOS 18.0 or later. Some features depend on your device's motion sensor capabilities. System requirements may change without notice as the App is updated.

Any internet connection, data charges, or device costs required to use the App are your responsibility.

Continued use of the App — particularly with the background monitoring feature enabled — will consume battery power. This is an inherent characteristic of running the App and constitutes normal wear. We are not liable for battery consumption or any associated long-term battery degradation resulting from use of the App.

Art. 5Fees, Purchase, and Refunds

The App is available as a one-time purchase through the App Store. The price is shown on the App's listing page.

All payments are processed through Apple Inc.'s App Store payment system. All matters related to payment, billing, and refunds are governed by Apple Inc.'s terms and policies. If you wish to request a refund, please do so through the App Store in accordance with Apple's refund policy. We are not in a position to process refunds directly.

If any future updates become paid, we will notify you in advance.

Art. 6Prohibited Conduct

When using the App, you must not:

  • Violate any applicable law, regulation, or standards of public order and decency
  • Reverse engineer, decompile, disassemble, or attempt to derive the source code of the App
  • Copy, modify, translate, create derivative works of, redistribute, sell, rent, or publicly transmit the App or any part of it
  • Commercially resell or redistribute the App to third parties
  • Infringe on the intellectual property rights, privacy rights, reputation, or other rights of us or any third party
  • Use the App for medical diagnosis or treatment purposes
  • Transmit or introduce any virus, malware, or other harmful code into the App
  • Interfere with the normal operation of the App
  • Engage in any other conduct we reasonably deem inappropriate

Art. 7Disclaimer of Warranties

The App is provided "AS IS" and "AS AVAILABLE." To the fullest extent permitted by applicable law, we disclaim all warranties, express or implied, including but not limited to:

  • Fitness for a particular purpose
  • Merchantability
  • Accuracy, completeness, reliability, or timeliness
  • Uninterrupted availability or error-free operation
  • That defects will be corrected
  • That the App or its servers are free of viruses or other harmful components

We make no warranty of any kind regarding improvement in posture or any health-related outcome.

Some jurisdictions do not allow the exclusion of implied warranties. In such jurisdictions, some of the above exclusions may not apply to you.

Art. 8Limitation of Liability

  1. To the fullest extent permitted by applicable law, we shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages (including, but not limited to, loss of profits, loss of data, loss of goodwill, or cost of substitute services) arising out of or related to your use of, or inability to use, the App — even if we have been advised of the possibility of such damages.
  2. To the extent our liability is found, our total liability to you shall not exceed the amount you actually paid to purchase the App.
  3. We are not liable for any damages caused by third-party services (including Apple Inc.'s App Store).
  4. We are not liable for any damages arising from actions you take based on the App's posture detection results (including any delay in seeking medical attention).
Mandatory consumer protection laws in certain jurisdictions (including Japan's Consumer Contract Act, EU consumer law, and Australian Consumer Law) may limit our ability to exclude or cap liability. Your statutory rights under those laws are not affected by this clause.

Art. 9Intellectual Property

All intellectual property rights in the App and its components (including software, design, text, graphics, logos, and icons) belong to us or their respective rightful owners. These Terms do not transfer or grant any rights beyond the limited license to use the App. The name "HeadUp" and our logo are our identifiers and may not be used without permission.

Art. 10Feedback

If you provide us with any ideas, suggestions, improvements, or other feedback ("Feedback"), we may use that Feedback for any purpose without compensation to you. You agree not to assert any rights against us with respect to such Feedback.

Art. 11Changes to or Discontinuation of the App

We may change the content or specifications of the App, or suspend or discontinue its provision, without prior notice. To the extent permitted by applicable law, we are not liable for any damage you incur as a result.

If we discontinue the App, we will endeavor to announce this on our website within a reasonable period in advance.

Art. 12Changes to These Terms

We may revise these Terms at any time by posting the updated version on this page. For material changes, we will endeavor to provide notice through the App or on this website. Your continued use of the App after the revised Terms are posted constitutes your acceptance of the changes.

Please check these Terms periodically. The date of the last update is shown at the top of this page.

Art. 13Age Restrictions

The App is not intended for use by anyone under the age of 13 (or the applicable digital age of consent under data protection law in your region — 16 in the EU/EEA/UK or as otherwise specified by local law). Persons under 13 may not use the App.

If you are a minor (under 18), please use the App only with the understanding and supervision of a parent or guardian.

Art. 14Export Controls

You agree to comply with all applicable export control laws and regulations, including those of Japan and your country of residence. You represent and warrant that you are not located in a sanctioned country and are not listed on any government list of prohibited or restricted parties.

Art. 15Severability and Waiver

If any provision of these Terms is held invalid or unenforceable by a court of competent jurisdiction, the remaining provisions shall continue in full force and effect. The invalid provision shall be reformed to the maximum extent permitted by applicable law.

Our failure to exercise any right under these Terms shall not constitute a waiver of that right.

Art. 16Entire Agreement

These Terms and the Privacy Policy constitute the entire agreement between us and you regarding your use of the App, and supersede all prior oral or written agreements.

Art. 17Apple-Specific Terms

The App is distributed through Apple Inc.'s App Store. This Article supplements the End User License Agreement (EULA) requirements mandated by Apple Inc.

  • These Terms are between us and you — not between Apple Inc. and you. Apple Inc. bears no responsibility for the App or its content.
  • Maintenance and support for the App is provided by us, not Apple Inc. Apple Inc. has no obligation to provide any support.
  • In the event the App fails to conform to any applicable warranty, you may notify Apple Inc., and Apple Inc. may refund the purchase price. To the maximum extent permitted by law, Apple Inc. has no other warranty obligation with respect to the App.
  • We — not Apple Inc. — are responsible for addressing any claims by you or any third party relating to the App or your use of it, including intellectual property infringement claims.
  • Apple Inc. and its subsidiaries are third-party beneficiaries of these Terms. Upon your acceptance of these Terms, Apple Inc. will have the right (and will be deemed to have accepted the right) to enforce these Terms against you as a third-party beneficiary thereof.

Art. 18Mandatory Consumer Protection Laws

Nothing in these Terms limits any rights you may have under the mandatory consumer protection laws of your country of residence.

  • EU / EEA / UK users: Mandatory rights under EU consumer protection directives and the UK Consumer Rights Act (including the 14-day withdrawal right) take precedence over any conflicting provisions of these Terms.
  • Australian users: Statutory guarantees under the Australian Consumer Law are not excluded by these Terms.
  • Canadian users: Mandatory rights under applicable provincial consumer protection legislation take precedence over any conflicting provisions of these Terms.
  • Korean users: Mandatory provisions of the Act on the Consumer Protection in Electronic Commerce and other applicable Korean laws take precedence over any conflicting provisions of these Terms.

Art. 19Governing Law and Jurisdiction

These Terms are governed by the laws of Japan, excluding its conflict-of-law provisions.

In the event of any dispute between us and you relating to the App, both parties will first attempt to resolve the matter through good-faith negotiation. If resolution cannot be reached, the courts with jurisdiction over our location in Japan shall have exclusive jurisdiction as the court of first instance.

However, where the mandatory consumer protection laws of your country of residence grant you the right to bring proceedings in the courts of your country, this clause does not limit that right.

Art. 20Contact

For any questions regarding these Terms, please contact us via the Contact page.