← Kurozu

Terms of Service

Effective date: June 29, 2026
Last updated: July 9, 2026

These Terms of Service ("Terms") govern your use of the kurozu mobile application for iOS (the "App") operated by kurozu ("we," "us," or "our").

By downloading, installing, or using the App — including by continuing locally, creating a cloud account, or tapping a sign-in button that references these Terms — you agree to these Terms and our Privacy Policy. If you do not agree, do not use the App.

Contact: support@kurozu.app

1. The service

kurozu is a local-first personal timeline application. You can record events, observations, and context as facts arranged in time, optionally organized into timelines.

The App is designed to help you build portable personal context — including health-related context you choose to record — for your own use and, if you wish, to copy or export elsewhere.

The App is not a medical device, clinical decision support tool, or substitute for professional medical advice, diagnosis, or treatment.

The initial iOS release does not include cloud AI features; disabled or coming-soon AI controls do not send your content to us or to AI providers.

2. Eligibility

You must be at least 13 years old (or the minimum age required in your jurisdiction) to use the App. If you are under the age of majority where you live, you may use the App only with permission of a parent or guardian who accepts these Terms on your behalf.

3. Local-only and cloud modes

3.1 Local-only (no account)

You may use core timeline features without signing in. In this mode:

3.2 Cloud account (opt-in)

If you sign in, you may create cloud-synced timelines stored on our servers, tied to your authentication identity (via Supabase).

Local-only and cloud timelines are separate. Signing in does not automatically upload your existing local timelines.

4. Accounts

If you create an account, you must provide accurate information, keep access to your account secure, and notify us of unauthorized use. We may suspend accounts that violate these Terms or create legal or security risk.

5. Apple Health preview

The App may include a preview feature that reads Apple Health data on your device after you grant permission.

6. Export

Export generates plain text on your device and copies it to your clipboard. You choose where to paste it. We are not responsible for third-party apps, websites, AI services, or how they handle exported content.

If you include selected Apple Health summaries in an export, the App shows an inline notice that the export may contain sensitive health information before it is copied. Only share that information with services or people you trust.

7. Acceptable use

You agree not to use the App unlawfully, interfere with or abuse the service, upload content you do not have rights to, or use the App to provide medical care or emergency services.

Where AI features are enabled in a future release, you also agree not to misrepresent AI-generated content as professional medical advice.

We may remove content or suspend access for violations.

8. Your content

You retain ownership of content you create. You grant us a limited license to host, process, and display cloud-synced content solely to operate the service.

You represent that you have the rights to the content you submit and that it does not violate these Terms or others' rights.

9. Intellectual property

The App, its design, branding, and underlying software are owned by us or our licensors. These Terms do not grant you rights to our trademarks or code except the limited license to use the App as intended.

10. Third-party services

The App integrates with third-party services including Supabase, Google, Apple, and Firebase. Your use of those services may be subject to their terms and policies. We are not responsible for third-party services outside our reasonable control.

11. Disclaimers

THE APP AND ALL CONTENT ARE PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

WE DO NOT WARRANT THAT THE APP WILL BE UNINTERRUPTED, ERROR-FREE, OR SECURE, OR THAT OUTPUT FROM ANY THIRD-PARTY SERVICE YOU USE WITH EXPORTED CONTENT WILL BE ACCURATE OR COMPLETE.

HEALTH AND MEDICAL DISCLAIMER: THE APP IS FOR PERSONAL INFORMATION MANAGEMENT ONLY. IT DOES NOT PROVIDE MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A QUALIFIED HEALTH PROVIDER WITH QUESTIONS ABOUT A MEDICAL CONDITION. NEVER DISREGARD PROFESSIONAL MEDICAL ADVICE BECAUSE OF SOMETHING IN THE APP.

12. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, WE AND OUR AFFILIATES, OFFICERS, EMPLOYEES, AND SUPPLIERS WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF DATA, PROFITS, OR GOODWILL, ARISING FROM YOUR USE OF THE APP.

OUR TOTAL LIABILITY FOR ANY CLAIM RELATING TO THE APP OR THESE TERMS WILL NOT EXCEED US $100.

SOME JURISDICTIONS DO NOT ALLOW CERTAIN LIMITATIONS; IN THOSE CASES, OUR LIABILITY IS LIMITED TO THE FULLEST EXTENT PERMITTED BY LAW.

Nothing in these Terms limits liability that cannot be limited under applicable law, including liability for willful misconduct or gross negligence where such limitation is prohibited.

13. Indemnification

You agree to indemnify and hold us harmless from claims, damages, and expenses (including reasonable legal fees) arising from your content, your use of the App, or your violation of these Terms, except to the extent caused by our gross negligence or willful misconduct.

14. Termination and account deletion

You may stop using the App at any time. You may delete your cloud account in Settings, which deletes cloud timelines and authentication data from active systems as described in the Privacy Policy.

We may suspend or terminate access if you breach these Terms or if we discontinue the App.

Sections that by their nature should survive (including disclaimers, limitation of liability, and indemnification) survive termination.

Uninstalling the App does not delete cloud data unless you delete your account first.

15. Changes

We may modify the App or these Terms. We will post updated Terms at this URL and update the effective date. Material changes may be communicated in the App or by email where appropriate. Continued use after changes become effective constitutes acceptance.

16. Governing law and disputes

These Terms are governed by the laws of Japan, without regard to conflict-of-law rules. If you are a consumer, nothing in these Terms limits any mandatory rights or protections you may have under the laws of the country or region where you live.

Except where applicable law gives you the right to bring a claim elsewhere, you and we agree that disputes arising out of or relating to these Terms or the App will be resolved in the courts of Japan, with the Tokyo District Court as the exclusive court of first instance.

Before filing a claim, you agree to contact us at support@kurozu.app so we can try to resolve the issue informally.

17. General

18. Contact

kurozu
Email: support@kurozu.app

These Terms supplement, and do not replace, Apple's applicable App Store terms.