Errorcard

Errorcard is a mistake-tracking and review app designed for students and independent learners. It helps users organize incorrect answers, reinforce weak areas, and improve learning efficiency through regular practice. Users can create and categorize single-choice, multiple-choice, and true-or-false questions by subject, including answers, difficulty levels, explanations, and personal study notes. The app offers multiple review modes, including random practice, flashcard review, and mock tests, while automatically tracking practice activity, accuracy, and test performance. The dashboard visualizes learning progress through forgetting curves, seven-day review activity, accuracy trends, and subject mastery charts. Errocard provides a clear and convenient learning cycle—from recording mistakes to reviewing, practicing, testing, and analyzing progress.