Terms of Service

Last Updated: February 12, 2026

These Terms of Service (hereinafter referred to as the "Terms") establish the conditions for using the iOS application "Ichimoku Shift Calendar" (hereinafter referred to as the "App") provided by Nakawa (hereinafter referred to as the "Developer"). All users (hereinafter referred to as "Users") must agree to and comply with these Terms to use the App.

1. Application of Terms

  1. These Terms shall apply to all relationships between the User and the Developer regarding the use of the App.
  2. In addition to these Terms, the Developer may establish separate individual rules or guidelines (hereinafter referred to as "Individual Regulations") for the App. These Individual Regulations shall constitute a part of these Terms regardless of their name.

2. Registration and Data Management

  1. The App can be used without registering an account.
  2. To enhance user convenience, the App utilizes Apple's iCloud service to back up and synchronize data.
  3. Data entered by the User, such as shift schedules, memos, and settings, are stored locally on the User's device and in platform-provided cloud storage (e.g. iCloud on iOS). Personal information is not transmitted to or managed by the Developer's servers.

3. Premium Plan

  1. While the App offers core features for free, Users may purchase the "Ichimoku Premium" plan (a one-time purchase) to unlock all features, including ad removal, system calendar auto-sync where available, custom themes, and other premium features.

4. Prohibited Activities

When using the App, Users are prohibited from engaging in the following acts:

  1. Acts that violate laws, regulations, or public policy.
  2. Acts related to criminal activity.
  3. Acts that destroy or interfere with the functionality of the App.
  4. Disassembling, decompiling, or reverse engineering the App.
  5. Acts that cause disadvantage, damage, or discomfort to other Users or third parties.
  6. Any other acts deemed inappropriate by the Developer.

5. Suspension of Service

The Developer reserves the right to suspend or interrupt the provision of all or part of the App without prior notice if any of the following events occur:

  1. When performing maintenance, inspection, or updating of computer systems related to the App.
  2. When it becomes difficult to provide the App due to force majeure such as earthquakes, lightning strikes, fires, power outages, or natural disasters.
  3. When the Developer determines that the continued provision of the App is otherwise difficult.

6. Disclaimers and Limitation of Liability

  1. 【IMPORTANT】 Regarding the Alarm Feature: The App utilizes the native iOS notification system (AlarmKit/UserNotifications) to provide alarms. However, alarms may fail to sound due to a dead device battery, OS bugs, User configuration errors, or other unexpected technical issues. The Developer shall not be held liable for any tardiness, damages, or financial losses resulting from the failure of the App's alarms to sound. If you have an important schedule, we strongly recommend using a secondary backup alarm.
  2. 【IMPORTANT】 Regarding Calendar Sync: The "iOS Calendar Auto-Sync" feature relies on the EventKit system provided by Apple. The Developer assumes no responsibility for any damages caused by sync delays, failures, or unintended data modifications resulting from OS bugs or unexpected errors.
  3. The Developer makes no explicit or implied warranties that the App is free from de facto or legal flaws (including defects relating to safety, reliability, accuracy, completeness, effectiveness, fitness for a particular purpose, security-related faults, errors, bugs, or infringement of rights).
  4. The Developer assumes no responsibility for any transactions, communications, or disputes occurring between a User and another User or third party in relation to the App.

7. Changes to Terms

The Developer may change these Terms at any time without prior notice to the User if deemed necessary. If a User begins to use the App after any modifications to these Terms, the User shall be deemed to have consented to the modified Terms.

8. Governing Law and Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of Japan. In the event of a dispute arising in connection with the App, the court having jurisdiction over the location of the Developer shall be the court of exclusive jurisdiction.

← Back to Home