Ultimate Wrong Answer Journal

Don't Make The Same Mistake Twice. Master Your Exam Weaknesses

Recommended by 99th percentile scorers. Capture failed prep questions via OCR, diagnose their cognitive failure reasons, and study them using scientific spaced repetition.

Study Dashboard
Pattern Recognition
Offline-First Data
Mastery Percentage
74.2% +5.4% this week
Active Error Log
142 Questions total
Today's SRS Queue
12 Pending Quiz

Engineered For High-Stakes Exam Prep

Study smarter, recognize logical patterns, and eliminate repeat errors.

On-Device OCR Scanner

Snapshot failed questions from books or screens in under 10 seconds. iOS native VisionKit automatically extracts the text and stores the image locally.

Cognitive Taxonomy

Categorize errors by root cause: Content Gaps, Careless Mistakes, Misreads, Logic Traps, or Time Pressure. Identify exact behavioral patterns holding your scores back.

Spaced Repetition (SM-2)

Reviewing too early creates false fluency. MistakeLab schedules re-testing drills at optimal scientific intervals so you permanently lock in corrections.

Interactive Quiz Flashcard

Experience the active recall flow. Read the mock SAT/GMAT question below, guess the solution, and click to flip the card and check the remediation notes.

SECTION: QUANTITATIVE Quiz Active

If x is a positive integer and x² + x is odd, which of the following must be true?

  • A) x is odd
  • B) x is even
  • C) x² is odd
  • D) None of the above
Tap to reveal solution
CORRECT ANSWER: D Concept Trap

REMEDIATION LESSON

"The product of two consecutive integers x(x + 1) is always even, because one of them must be even. Thus, x² + x can never be odd. Don't rush to guess values!"

Tap card to hide solution

Interactive Cognitive Taxonomy

To fix a mistake, you must isolate the psychological reason behind it. Select one of the 5 categories below to analyze your patterns.

Select a Failure Profile

Click any of the 5 categories on the left to learn its cognitive definition, exam examples, and diagnostic study advice.