Haku - Write & Let Go

Your words leave no trace.

Only for iPhone

Free · In‑App Purchases

iPhone

Write down what you want to let go of, then release it. Your words vanish, and Haku never saves or sees them. Each time you let go, only a small mark remains. Write down what you don't want to hold onto. Haku gives you a private space for thoughts you need to release but don't want to keep. Write them as they come, then let them go. The words disappear, leaving nothing to find or reread. Write it when: • A thought keeps circling late at night • You need to answer a message you may never send • An argument is over, but you still have things to say • Something is on your mind, and you want to set it down • You want to find the words before you say them to someone PRIVATE BY DESIGN Haku never saves, uploads, or analyzes what you write. No one at Haku can see your words, and no AI reads them. You don’t need an account, and we don’t track you. Haku keeps your page protected while you write. It hides your words if you switch apps or put your phone face-down, and can ask for Face ID or your passcode before showing your writing again. Third-party keyboards are off unless you choose to turn them on. A MARK EACH TIME YOU LET GO Each time you let go, History adds a small mark. Over time, these marks show how often you’ve written and released your thoughts, without saving any words. HAKU LEAF Everything described above is free. Haku Leaf is an optional one-time purchase that gives you nine color themes, three extra writing fonts, 53 more History marks, and iCloud sync for your History across devices. Only dates and marks sync, never your writing.

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Let go with a new pull gesture and flowing ink. After each release, a small confirmation shows the mark added to History. This update also improves onboarding, the writing layout, and the Haku Leaf screens.

Version 1.1

The developer, Arturo Castaneyra, 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 Not Collected

    The developer does not collect any data from this app.

    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
    Arturo Castaneyra
    Size
    9.3 MB
    Category
    Lifestyle
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Arturo Castaneyra
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More