Your Mistake Book, ready for another try
MistakeKit brings question capture, a Mistake Book, and a printable worksheet maker together for students, parents, and teachers preparing focused practice. Your Mistake Book holds saved questions; a Worksheet combines selected questions into a printable PDF.
1. Capture and save questions
Photograph a question or import an image from Photos. In iOS 1.2, you can manually frame up to 20 questions in a single photo and save them as separate questions. Select a numbered box to see its preview. Pinch to zoom, use two fingers to move the photo, or open the full-screen crop editor for finer adjustments. Importing several photos still processes one question per photo.
New questions default to Pure B&W. Switch to Original or Optimized when that better preserves colors or diagrams. Use the manual white brush to erase unwanted marks, checking the question text before saving. This is not automatic handwriting removal.
Save questions in your Mistake Book and organize them in folders. Review status helps you find questions you want to attempt again.
Edit a saved question image
In iOS 1.2, open a question from its folder and choose Edit Image to crop, rotate, change the print effect, or adjust erasures. Saving updates the same question; canceling leaves it unchanged. The app retains the initial cropped image before effects and erasures, not a separate full-page original. Later edits stay within that first crop. Older questions start from their existing saved image and cannot recover previously removed content or colors. Existing PDFs remain unchanged.
2. Select questions and adjust sizes
Open Create, filter saved questions by folder, date, or status, and select the questions for your worksheet. Set each question’s writing space in its question details or before saving during capture.
In Layout preview, choose automatic, half, or full width and adjust image size from 60% to 100%. The app arranges questions and calculates page breaks automatically. This controls size and width, not arbitrary drag-and-drop positioning.
3. Create a PDF, print, and practice
Apply your layout choices, then choose Create Worksheet to generate an A4 or Letter PDF. Review the result, then open the saved worksheet in Worksheets to share it or use system printing, including AirPrint with a compatible printer.
After practicing, update question status yourself. Opening, sharing, or printing a PDF does not mark questions as practiced or mastered. Saved PDFs preserve their original content; create a new worksheet when you want a different selection or layout.
Trial and MistakeKit Pro
A seven-day local trial lets you try PDF creation. After the trial, you can still add and organize questions and open, share, or print existing PDFs. Creating new worksheet PDFs requires a one-time MistakeKit Pro purchase. There is no monthly subscription; the purchase screen shows the current localized StoreKit price.
Local study materials
Question images and PDFs are stored locally on your device. There is no app account or cross-device cloud sync. Export PDFs you want to keep before uninstalling. Optional analytics and purchase processing are described in the iOS privacy policy.
See an actual export
Open the sample A4 worksheet (PDF). This real export from an earlier app version uses fictional math questions and may retain an older heading. Imported question text stays in its original language when you change the app language.