Support

one-by.one Support

Last updated: November 7, 2026

The launch scope is worldwide except the countries and territories listed in our terms. The app interface is available in nine languages; these help pages are in English. The App Store shows the price for your country.

Get help

Email support@one-by.one. Tell us what you tried, what happened and any error message. App and iOS versions can help. Do not send passwords, sign-in tokens or payment-card numbers.

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.

We keep support and privacy email for 12 months after the last message in the conversation, then delete it, unless a specific legal obligation requires longer retention. You can ask us to delete your messages sooner. Server backups are retained for a maximum of 30 days. Messages sent to support@one-by.one and privacy@one-by.one are forwarded by Cloudflare Email Routing to Google (Gmail), with processing in the United States and other countries where these providers operate data centers; see the privacy policy for provider and transfer details.

Bug reports sent through your connected AI are linked to your account. They contain the description and diagnostics you agree to share, with no automatic attachments. A receipt means stored; it does not promise a reply or fix.

Connect your AI

Connect any MCP agent that supports remote HTTP and OAuth. Our Connect guide has the server URL, permissions and setup instructions for web connectors, CLI tools and editors. You can have up to three AI connections per account.

AI connections use your existing one-by.one account entitlement. If you already have access but the connection is unavailable, restore purchases or check that you are signed in to the correct account.

Disconnect an AI app

In the iPhone app, open Settings › AI apps and tap Disconnect next to the connection. You can also use Disconnect on the connection's one-by.one authorization page, or remove the connector through your AI app's controls.

Revoking access blocks future tool calls. It does not delete your records or copies already received by the AI app.

Delete your account

To delete your account in the app, open the menu, tap Account, then Delete account and confirm. For deletion help, email privacy@one-by.one.

Account deletion removes account content, connections and bug reports from the live database immediately when accepted. Server backups, including any pre-deletion encryption key, expire within a maximum of 30 days; backup copies may remain for up to 30 days after deletion. Unlinked Apple purchase notifications expire seven days after receipt and become eligible for scheduled cleanup; they do not restore deleted account content.

Deletion does not erase exported files, Calendar events, copies in AI chats or other independently held copies. Manage them through the relevant app or provider. See deletion details.

Privacy rights and consent withdrawal

Storing health-related records requires explicit consent in the app; it is a condition of use. If you decline or withdraw it, your records become read-only: Start and Done stop, while reading your records, requesting a copy and deleting your account remain available. Sharing records with an AI app is approved per app on its one-by.one approval page when you connect it; withdraw it with Disconnect in Settings › AI apps. Calendar sharing is optional; turn it off in Settings. You can withdraw storage consent in Settings or email privacy@one-by.one for help. Offline requests must reach the server before withdrawal can be confirmed. Withdrawal stops the corresponding future processing; request deletion of stored records separately, and contact the AI provider to delete copies it independently holds.

For access, correction, deletion, a portable copy, consent withdrawal, restriction, objection or an appeal, email privacy@one-by.one with your account, country or US state, and request details. Do not include passwords or sign-in tokens. Our privacy officer, DPO and Quebec privacy responsible person is Seungeun Kim, reachable at that email or 302, 173 Donggwang-ro, Seocho-gu, Seoul, Republic of Korea. Read the request procedure, consumer health data policy and major regional rights and complaint routes.

Calendar sharing and images

Calendar data remains available to connected AI until the server confirms withdrawal. Offline withdrawal is retried when the app reconnects.

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.

Subscription help

Purchases, renewals, cancellation and refunds are handled through Apple under its App Store rules and Apple Media Services terms, subject to mandatory consumer rights. Account deletion does not cancel your auto-renewing subscription; cancel it separately through Apple.

To cancel, open the menu in the app and choose Subscription, then Manage or cancel subscription, or go to Settings › your name › Subscriptions on your iPhone. To ask for a refund, use reportaproblem.apple.com; Apple handles refund requests under its rules, subject to your mandatory consumer rights.