one-by.one

Your AI plans. You just do.

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Your AI plans. You just do. It fits your habits between your schedule and to-dos, then hands you one card at a time. Nothing to plan, nothing to remember. Plan nothing. Remember nothing. Have a better day. Your own AI lays out your day: your schedule, your to-dos and the habits you want, fitted in between, down to the travel and prep. one-by.one runs it on your iPhone, one card at a time. Tap Start, do the card, tap Done. Timers keep track of waits and bring the follow-up back when it's time. Records shows what you did, day by day. For ADHD brains that want one clear next step: no list to sort, no plan to hold in your head. Just the card in front of you. Connect your own AI, such as Claude, ChatGPT or another compatible assistant, at https://mcp.one-by.one/mcp. The app never calls a model. No AI yet? Start from the daily items you pick in onboarding. Home Screen, Lock Screen and StandBy widgets are included. Upcoming shows the days ahead; Interests keeps what matters to you. There is no Watch app in 1.0. The app UI is in English. Sign in with Apple or Google. Before saving records that may include health information, the app asks for your consent. Sharing with an AI app is approved separately for each connection. Subscribe yearly for $59.99/year in the U.S., with a 14-day free trial for eligible subscribers, or choose monthly. The purchase screen shows current storefront prices, trial eligibility and automatic renewal terms. Use Menu > Subscription > Restore to restore purchases. Delete your account in Menu > Account > Delete account. Account deletion does not cancel an App Store subscription. Terms of Use (EULA): https://one-by.one/terms/

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The developer, Seungeun Kim, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Seungeun Kim
Size
23 MB
Category
Productivity
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 2 more
  • English, Japanese, Korean
Age Rating
9+
In-App Purchases
Yes
  • one-by.one Monthly $12.99
  • one-by.one Yearly $59.99
  • Learn More
Copyright
© Seungeun Kim
  • Privacy Policy
  • License Agreement