Terms of Use for Keizoku
Last Updated: 9 May 2026
Agreement to Terms
By downloading, installing, or using the Keizoku app (the "App"), you agree to be bound by these Terms of Use ("Terms"). If you do not agree to these Terms, please do not use the App.
Description of Service
Keizoku is a habit streak tracking app that helps you build and maintain daily habits. The App provides the following features:
- Create and manage multiple habits
- Track daily streak records with a one-tap check-in
- View streak statistics including current streak, best streak, and failure count
- Home screen and lock screen widgets for quick check-in and streak display
- Local reminder notifications with customisable time and message per habit
- Optional iCloud sync across your own Apple devices
Licence
Grant of Licence
Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable licence to:
- Download and install the App on Apple devices you own or control
- Use the App for personal, non-commercial purposes
Restrictions
You agree NOT to:
- Modify, reverse engineer, decompile, or disassemble the App
- Remove any copyright or proprietary notices from the App
- Use the App for any illegal or unauthorised purpose
- Attempt to gain unauthorised access to any portion of the App or its infrastructure
- Use the App in any way that could damage, disable, or impair the App or Apple's systems
- Sell, rent, lease, or sublicence the App
- Use automated systems or scripts to manipulate the App
User Content
The habit names, records, and notification messages you create within the App are your content. You retain full ownership of your content. Keizoku does not claim any rights over the content you create.
Your content is stored locally on your device by default. If you enable iCloud Sync, your content is stored in your private iCloud account. We do not access or use your content for any purpose other than providing the App's functionality.
Data and Privacy
Your use of the App is also governed by our Privacy Policy, which is incorporated into these Terms by reference. Key points:
- Your habit data is stored locally on your device by default
- We use Firebase Anonymous Authentication and Firebase Analytics
- iCloud Sync is optional and user-controlled
- We do not sell your data
- For full details, see our Privacy Policy
Intellectual Property
Our Content
The App and its original content, features, design, and functionality are owned by the developer and are protected by international copyright, trademark, and other intellectual property laws.
Feedback
If you provide us with any feedback, suggestions, or ideas about the App, you grant us the right to use such feedback without any obligation to you.
Disclaimer of Warranties
THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO:
- Warranties of merchantability or fitness for a particular purpose
- Uninterrupted, error-free, or secure operation
- Accuracy or completeness of streak statistics
- Reliability of reminder notifications
- Compatibility with all iOS versions or future Apple updates
Limitation of Liability
TO THE MAXIMUM EXTENT PERMITTED BY LAW, IN NO EVENT SHALL THE DEVELOPER, ITS AFFILIATES, OR LICENSORS BE LIABLE FOR:
- Any indirect, incidental, special, consequential, or punitive damages
- Loss of data, including streak records, due to device failure, OS updates, or accidental deletion
- Damages arising from missed habit reminders or notification failures
- Any damages arising from your use or inability to use the App
IN NO EVENT SHALL OUR TOTAL LIABILITY TO YOU EXCEED THE AMOUNT YOU PAID FOR THE APP.
Indemnification
You agree to defend, indemnify, and hold harmless the developer and its affiliates from any claims, damages, obligations, losses, liabilities, costs, or expenses (including solicitor's fees) arising from:
- Your use of the App in violation of these Terms
- Your violation of any applicable laws or regulations
- Your violation of any third-party rights
Changes to the App
We reserve the right to:
- Modify, update, or discontinue the App at any time
- Change features or functionality
- Update the App for compatibility with new iOS or Apple hardware versions
We are not liable to you for any modification, suspension, or discontinuance of the App.
Changes to Terms
We may revise these Terms from time to time. We will notify you of changes by:
- App Store update notes
- Updating the "Last Updated" date on this page
Your continued use of the App after changes become effective constitutes acceptance of the revised Terms.
Termination
By You
You may stop using the App at any time by deleting it from your device.
By Us
We may terminate or suspend your access to the App immediately, without prior notice or liability, if you breach these Terms or we are required to do so by law.
Effect of Termination
Upon termination, your licence to use the App will immediately cease. Locally stored data will remain on your device until you delete it or uninstall the App.
Dispute Resolution
Governing Law
These Terms shall be governed by and construed in accordance with the laws of Japan, without regard to conflict of law principles.
Informal Resolution
Before filing a claim, you agree to contact us and attempt to resolve the dispute informally by emailing support@sbryu.com.
Apple-Specific Terms
App Store Requirements
- These Terms are between you and the developer, not Apple
- Apple has no responsibility for the App or its content
- Apple has no warranty obligation for the App
- Apple is not responsible for maintenance or support services for the App
- Apple is not liable for any claims related to the App, including product liability, consumer protection, or intellectual property claims
Third-Party Beneficiary
Apple and its subsidiaries are third-party beneficiaries of these Terms and, upon your acceptance, Apple will have the right to enforce these Terms against you.
Severability
If any provision of these Terms is found to be unenforceable or invalid, that provision will be limited or eliminated to the minimum extent necessary, and the remaining provisions will remain in full force and effect.
Waiver
Our failure to enforce any right or provision of these Terms will not be considered a waiver of those rights.
Entire Agreement
These Terms, together with our Privacy Policy, constitute the entire agreement between you and the developer regarding the App and supersede all prior agreements.
Contact Information
If you have any questions about these Terms, please contact us:
- Email: support@sbryu.com
Acknowledgement
BY USING KEIZOKU, YOU ACKNOWLEDGE THAT YOU HAVE READ THESE TERMS OF USE, UNDERSTAND THEM, AND AGREE TO BE BOUND BY THEM.