Terms of Use

one-by.one Terms of Use

Last updated: November 7, 2026

These terms cover the one-by.one iPhone app and MCP connection service provided by salad76, a sole proprietorship in the Republic of Korea represented by Seungeun Kim, doing business as one-by.one. By using the service, you agree to these terms.

The service

The Now screen shows what to do now from your day plan. You can connect your AI app to read records and make changes you explicitly request through its tools, within approved permissions. You may use the service for lawful personal use under these terms. Read our privacy policy for data handling.

Worldwide launch scope and language

The service launches worldwide except the entire EU/EEA (the 27 EU member states: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden; plus Iceland, Liechtenstein and Norway), the United Kingdom, Switzerland, mainland China, Hong Kong, Macao (Macau), Russia, Belarus, Iran, North Korea, Syria, Cuba, Türkiye (Turkey) and Vietnam. Use in these excluded countries and territories is not supported.

These launch exclusions reflect representative requirements in the EU/EEA, United Kingdom and Switzerland, and ChatGPT/Claude availability, sanctions, registration or localization requirements in the other excluded markets.

The app interface is available in English, Korean, Japanese, Simplified Chinese, Traditional Chinese, French, German, Spanish and Brazilian Portuguese. App Store availability and prices are country-specific; the purchase screen shows the price and terms for your country. ChatGPT and Claude access also depends on the provider's availability and your account.

Your account

You must be at least 16. If we learn an account belongs to someone under 16, we delete it. The iPhone app signs in with Apple or Google; existing email accounts can also sign in. Keep your sign-in access secure. You are responsible for content and changes you submit or ask your AI to submit.

Subscription

The app is a paid subscription from launch. App Store subscriptions renew automatically unless cancelled through Apple. Apple handles App Store purchases, renewal, cancellation and refund requests under the applicable Apple Media Services terms and App Store rules. Review the terms shown by Apple before purchasing. These purchase and refund rules do not exclude rights or remedies that mandatory consumer law gives you. Deleting your account does not cancel a subscription.

Plans: $12.99 per month or $59.99 per year in the United States; the App Store shows the price for your country. Yearly plan: 14-day free trial for eligible new subscribers, as determined by the App Store. The monthly plan has no trial. The purchase screen shows eligibility, the applicable price and renewal terms. If you do not cancel at least 24 hours before the trial or a period ends, the subscription renews and your Apple Account is charged. After the trial, a subscription is needed for paid product features and AI connections. Existing data can still be read, and account deletion, disconnection and sharing withdrawal remain available without a subscription.

Third-party AI

ChatGPT and Claude are separate services with their own terms, privacy policies and access requirements. Your connected AI receives saved content and can make changes within approved permissions. Review what you ask it to save or change; originals can remain after corrections, and some changes cannot be undone.

OAuth authenticates your identity. one-by.one separately records the product permissions you approve: context:read, activity:read, and activity:write.

Sharing images

Share images are generated on your device. one-by.one does not upload the generated image as part of rendering it. If you share it, the app or recipient you select receives that image under its own policies. Review the selected totals and the final image before sharing. Sensitive information is not removed automatically.

Acceptable use

Use the service lawfully. Do not access another person's account without permission, share unauthorized credentials, bypass access controls or interfere with the service. Submit only content you have the right to use.

AI output and availability

AI output can be wrong, incomplete or unsuitable. Check suggestions and saved changes before relying on them. We do not guarantee AI accuracy, a particular outcome or uninterrupted service. AI output is not a substitute for qualified professional advice.

Ending access

You may stop using the service, disconnect an AI or request account deletion. We may suspend or end access for a breach of these terms or misuse that threatens the service or other users, subject to applicable law. See support for deletion help and the privacy policy for deletion limits.

Liability

To the extent allowed by law, we are not responsible for indirect or consequential losses arising from use of the service. Nothing in these terms excludes liability that cannot legally be excluded or removes mandatory consumer rights.

Consumer rights

Nothing in these terms excludes, restricts or modifies a consumer guarantee, warranty, remedy or other right that cannot lawfully be excluded under the laws that apply to you. This includes applicable protections in the United States, Canada, Australia, New Zealand, Singapore, Brazil, the Republic of Korea, Japan, India and other launch markets. Our availability, liability and Apple purchase provisions are subject to these mandatory rights.

Governing law

These terms are governed by the laws of the Republic of Korea. Disputes are subject to the jurisdiction of the Seoul Central District Court, except where mandatory law provides otherwise. This choice of law and court does not limit the mandatory consumer protections of your country or state of residence or your right to bring a claim in the courts of your country under those protections.

Changes

We may update these terms. Updates will appear here with a revised effective date.

Contact

Support messages are accessed by the service operator for support and privacy requests. Hosting and email providers may process them to deliver and protect the service. Contact support@one-by.one or privacy@one-by.one. We do not promise a response time for ordinary support. Privacy-rights requests are handled within the periods required by applicable law.

App Store terms

These terms apply when you get the app from the Apple App Store, in addition to the terms above. If they conflict with the terms above, these terms win for the app obtained from the App Store.

1. These terms are between you and salad76 (doing business as one-by.one) only, not with Apple Inc. (“Apple”). salad76, not Apple, is solely responsible for the app and its content.
2. Your license to use the app is a non-transferable license to use it on Apple-branded products that you own or control, as permitted by the Usage Rules in the Apple Media Services Terms and Conditions, except that the app may be accessed by other accounts associated with you through Family Sharing or volume purchasing where available.
3. salad76 is solely responsible for any maintenance and support of the app, as described in these terms or as required by applicable law. Apple has no obligation to provide any maintenance or support for the app.
4. salad76 is solely responsible for any product warranties, whether express or implied by law, to the extent not effectively disclaimed. If the app fails to conform to any applicable warranty, you may notify Apple, and Apple will refund the purchase price, if any, for the app to you. To the maximum extent permitted by law, Apple has no other warranty obligation with respect to the app, and any other claims, losses, liabilities, damages, costs or expenses attributable to a failure to conform to a warranty are salad76’s responsibility.
5. salad76, not Apple, is responsible for addressing any claims by you or a third party relating to the app or your possession or use of it, including product liability claims, claims that the app fails to conform to any applicable legal or regulatory requirement, and claims arising under consumer protection, privacy or similar legislation.
6. If a third party claims that the app or your possession and use of it infringes that third party’s intellectual property rights, salad76, not Apple, is solely responsible for the investigation, defense, settlement and discharge of that claim.
7. You represent and warrant that you are not located in a country subject to a U.S. Government embargo or designated by the U.S. Government as a “terrorist supporting” country, and that you are not listed on any U.S. Government list of prohibited or restricted parties.
8. Questions, complaints or claims about the app go to salad76 (doing business as one-by.one), 302, 173 Donggwang-ro, Seocho-gu, Seoul, Republic of Korea, support@one-by.one.
9. You must comply with applicable third-party terms when using the app, including the terms of your wireless data service and of any AI service you connect.
10. Apple and Apple’s subsidiaries are third-party beneficiaries of these terms. Upon your acceptance of these terms, Apple will have the right, and will be deemed to have accepted the right, to enforce these terms against you as a third-party beneficiary.