Terms of Use

These terms set out the conditions for using Koharu ("the app"). The app is operated by Rintaro Sakino ("we", "the operator"). By using the app, you agree to these terms and the Privacy Policy.

1. License agreement

In addition to these terms, Apple's standard Licensed Application End User License Agreement applies to your use of the app. If these terms conflict with that agreement, that agreement prevails.

2. Who can use the app

The app is for people aged 18 and over. People under 18 may not use it.

3. Medical disclaimer

• What the app shows (Koharu's replies, patterns, appointment reports and so on) organizes your own records and provides general information. It does not replace the judgment of a doctor, pharmacist or other professional.
• Always talk to your doctor or pharmacist before changing a dose, stopping a medication or deciding whether to see a doctor.
• In an emergency or if your condition changes suddenly, do not use the app; call your local emergency number right away (911 in the US, 119 in Japan). Crisis lines are listed in the Medical disclaimer.

4. AI features

• Koharu is an AI. Replies are not written by a person.
• AI replies can be wrong or not fit your situation. Check with your doctor before making important decisions.
• Logs extracted from conversations can also be wrong. Check them on the log card and edit them if needed.
• Patterns are made by counting and comparing your records. They do not show causes and may change as you add more records.
• When a message contains words that suggest danger, the app shows crisis lines separately from the AI reply. This does not guarantee that every risk will be detected.
• The AI features are available only if you consent to sending the information described in the Privacy Policy to an AI provider in the United States. You can withdraw consent at any time in Settings → AI.
• The AI features rely on an external AI provider and may be temporarily unavailable, for example during outages.

5. Free and Premium

Daily counts reset at midnight Japan time.

6. Subscriptions

Premium is an auto-renewable subscription. Prices below are for the Japanese App Store and include tax. In other countries and regions, the price shown in the App Store applies.

• When you pay: Payment is charged to your Apple Account when you confirm the purchase. If a free trial applies, you are charged when the trial ends.
• Auto-renewal: Unless you turn off auto-renewal at least 24 hours before the end of the current period, the subscription renews automatically for the same period and price, and you are charged within 24 hours before the period ends.
• Free trial: The 7-day free trial is only for people subscribing to Koharu for the first time. If you cancel at least 24 hours before the trial ends, you are not charged. If notifications are allowed, the app reminds you 2 days before the trial ends.
• When Premium starts: Premium is available as soon as you confirm the purchase.
• Cancellation: On your iPhone, open Settings → your name at the top → Subscriptions → Koharu, and tap Cancel Subscription. If you cancel partway through a period, you can use Premium until the end of the period (there is no prorated refund; refunds work as described under Refunds). Deleting the app does not cancel the subscription.
• Refunds: Refunds follow Apple's rules. We cannot issue refunds ourselves. See Apple's guide to requesting a refund.
• Support plan: A plan for people who find it hard to continue for financial reasons, such as being on leave, having a low income or being a student. Eligibility is self-declared and not checked. What you declare is never stored or sent. It includes the same features as Premium. You can choose it from the "For people who find the price hard to manage (Support plan)" link on the main purchase screen, or from Settings → Subscription in Koharu.
• Starter plan (yearly): A separate yearly plan at ¥3,900, shown once when you close the first purchase screen without buying. It includes the same features as Premium and renews at the same price.
• Half price after turning off auto-renew: If you turn off auto-renew (including during a free trial), the next time you open Koharu we ask why and offer to continue at half price through an App Store promotional offer. This is shown once per expiration date. The monthly plan and the support plan are half price for 3 months from the next renewal, and the yearly plan and the yearly Starter plan for 1 year from the next renewal; after that they renew automatically at the regular price. If you don’t choose it, you can keep using Premium until it expires.
• Family Sharing: Not supported.

7. Prohibited conduct

When using the app, you must not:

• Break the law or act against public order
• Modify, decompile or disassemble the app
• Circumvent payments or usage limits, or send large numbers of requests automatically with programs
• Enter another person's personal information without their consent
• Send content that violates the AI provider's usage policies
• Harm our server, us or others

8. Data

Your records and conversation history are stored only on your iPhone. We cannot recover data lost because of a broken or lost iPhone, a change of device, deleting the app or similar. See the Privacy Policy for how data is handled.

9. Changes to and discontinuation of the app

We may change the app or stop providing it. We will give notice in advance before removing paid features or ending the service.

10. Disclaimer and limitation of liability

• We do not guarantee that the app is free of bugs, works on every device, fits your purpose, or that AI replies, patterns and appointment reports are accurate.
• If we are liable for damage arising from your use of the app, our liability is limited to the greater of the total amount you paid for the app in the 12 months before the damage occurred and ¥10,000. This limit does not apply to damage caused by our intent or gross negligence.
• Nothing in these terms limits rights you have under consumer protection laws that cannot be waived.

11. Changes to these terms

We may change these terms in accordance with the Civil Code of Japan. Before a change takes effect, we will post the new terms and the date they take effect on this page.

12. Governing law and jurisdiction

These terms are governed by the laws of Japan. The Tokyo District Court has exclusive jurisdiction as the court of first instance over any dispute relating to the app.

13. Contact

rintaro.sakino@process-craft-ai.com (Operator: Rintaro Sakino)