Mistake Board

A journal for everyday lessons

Only for iPhone

Free · In‑App Purchases

iPhone

Rushed to argue in a meeting, bought a subscription on impulse, or agreed to extra work while exhausted? Capture it in one line and leave yourself a better next step. Mistake Board is a local-first reflection journal. One line is enough to save a note. Expand the optional reflection when you want to add what happened and why. Write how to avoid it next time to create a prevention card automatically. You can: • Keep active notes on a board and file them when resolved • Log “It Happened Again” on the same record and keep its timeline • Review recurring patterns over 7 or 30 days • Pin an action rule and set a free weekly review reminder • Search, export, and create or restore JSON backups No account is required. Your records stay on your device. Feedback is optional: only when you submit, your text, optional email, and the app/device information listed on the form are forwarded through the feedback server. Records are not uploaded automatically. Recording, the board, review, cards, recurrences, search, export, and backup restore stay free. An optional one-time Pro purchase adds a privacy lock, extra reminders, and Home Screen / Lock Screen widgets. The App Store shows the price.

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New free Rule Check-Ins: from a prevention card or record details, note whether you used a rule and whether it helped—or that a similar situation has not come up yet. Each check-in keeps the rule as it was, with an optional note. View your history, delete a check-in, or undo a deletion. Check-ins do not change occurrence counts or resolved status. Check-ins are included in JSON backups and text exports. Upgrading preserves existing records and history without inventing past check-ins.

The developer, 昶 黄, 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:

    • Contact Info
    • User Content
    • Diagnostics

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

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

Seller
昶 黄
Size
5 MB
Category
Productivity
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 10 more
  • English, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Chang Huang