Terms of Use

Last updated: November 12, 2026

These Terms of Use ("Terms") govern your use of the iOS application "LunaCycle" ("App") provided by crelve ("we", "us", or "our"). By using the App, you agree to be bound by these Terms.

Article 1. Application

These Terms apply to all relationships between us and users regarding the use of the App.

Article 2. Service Description and Use

LunaCycle is a menstrual cycle tracking application that provides the following features:

• Recording period start and end dates and predicting your next period
• Logging moods, symptoms, flow levels and notes
• A calendar view with color-coded cycle phases, cycle statistics and trends
• An optional daily reminder
• Pregnancy mode, which shows the pregnancy week and an estimated due date from the last period start date you enter
• Export of your cycle and symptom records as a CSV file
• Premium features: a passcode lock (Face ID or device passcode), display of your estimated ovulation day and fertile window, and an ad-free experience

The App requires iOS 18.0 or later. Your records are stored on your device. The App does not require you to register an account. By downloading or using the App, you agree to these Terms.

The App is not intended for children under 13 years of age.

Article 3. Data Storage and Your Responsibilities

The cycle, symptom, mood, flow, note and pregnancy records you enter are stored locally on your device. We do not collect or store them on our servers, so we cannot recover them for you. They may be lost if you delete the App or lose or reset your device, unless your device backup restores them. You are responsible for your device, your backups, the security of your device (including using a passcode), and any CSV file you export and share.

Article 4. Prohibited Activities

You shall not engage in any of the following activities when using the App:

• Activities that violate laws or public order and morals
• Activities related to criminal acts
• Activities that infringe on intellectual property rights, portrait rights, privacy, reputation, or other rights or interests of us or third parties
• Activities that destroy or interfere with our servers or network functions
• Activities that may interfere with the operation of the App
• Unauthorized access or attempts thereof
• Reverse engineering, decompiling, disassembling, copying, or redistributing the App
• Activities that directly or indirectly provide benefits to antisocial forces in connection with the App
• Other activities we deem inappropriate

Article 5. Premium Subscription

Premium is offered as an auto-renewing subscription and may also be offered as a one-time purchase. Premium unlocks the passcode lock, the display of your estimated ovulation day and fertile window, and an ad-free experience. Plans, prices, and any free trial offer (including a 7-day free trial for eligible new subscribers) are those shown in the App Store at the time of purchase. Payment is charged to your Apple ID account at confirmation of purchase.

Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple ID Account Settings. Any unused portion of a free trial is forfeited when you purchase a subscription. All purchases are processed through Apple's App Store and are subject to Apple's terms. Refunds are handled by Apple under its policies.

Article 6. Suspension of Service

We may suspend or interrupt all or part of the App without prior notice if we determine that any of the following circumstances exist:

• When performing maintenance, inspection, or updates to the computer system for the App
• When it becomes difficult to provide the App due to force majeure such as earthquakes, lightning, fire, power outages, or natural disasters
• When computers or communication lines are stopped due to an accident
• When we otherwise determine it is difficult to provide the App

Article 7. Usage Restrictions

We may restrict all or part of your use of the App without prior notice if you violate any provision of these Terms or if we otherwise determine your use of the App to be inappropriate.

Article 8. Health Information Disclaimer

By using the App, you agree to the following:

• The App is a personal tracking tool. It is not a medical device and does not provide medical advice, diagnosis, or treatment.
• Predictions of periods, ovulation, fertile windows, due dates and pregnancy weeks are rough estimates calculated from the dates you enter. They may not reflect your actual physiological condition, and we do not guarantee their accuracy.
• You must not use the App for contraception (birth control), to avoid or achieve pregnancy, or to diagnose or treat any condition. Estimates of ovulation or fertile days are not a reliable method of preventing pregnancy.
• The App does not replace a doctor or other qualified professional. If you have health concerns, an irregular or unusual cycle, severe pain, or a possible pregnancy, consult a doctor.
• You are solely responsible for decisions you make based on information in the App.

Article 9. Disclaimer

We do not expressly or impliedly warrant that the App is free from defects in fact or law (including but not limited to defects related to safety, reliability, accuracy, completeness, effectiveness, fitness for a particular purpose, security, errors, bugs, or infringement of rights).

We shall not be liable for any damages arising from the App, except in cases of our intentional or gross negligence.

Article 10. Changes to Service Content

We may change, add, or discontinue the content of the App with prior notice to users, and users agree to this.

Article 11. Changes to Terms

We may change these Terms without notice when we deem it necessary. The revised Terms shall take effect from the time they are posted in the App or on our website.

Article 12. Handling of Personal Information

Personal information obtained through the use of the App shall be handled appropriately in accordance with our "Privacy Policy."

Article 13. Notices and Communications

Notices or communications between users and us shall be made by the method specified by us.

Article 14. Governing Law and Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of Japan. In the event of any dispute regarding the App, the courts having jurisdiction over our head office location shall have exclusive agreed jurisdiction.