Local-First Mistake Review App
Capture your mistakes from photos or text. Hide the answers, redo every question from scratch, review on a spaced schedule, and print clean practice sheets before your exam. No account needed — all data stays on your device.
Free for up to 40 cards. Pro unlocks unlimited cards, advanced PDF exports, and local backup.
Four steps that take you from a pile of wrong answers to a confident review session.
Scan worksheets or import photos from your camera roll. Mistake Review supports batch import of up to 30 images at once, with rotate, crop, and reorder tools built in. You can also create text-only cards for any subject.
Drag answer masks over any part of the image. During mistake review sessions, you only see the question first. Tap Reveal to check the answer and explanation. Every session is a genuine redo, not a passive re-read.
A simple, repeatable process from wrong answer to confident recall.
After a test or homework session, scan or photograph your wrong answers. Add a title, subject, exam tag, and mistake reason to keep your mistake review collection organized.
Draw masks over the answers on each card. One tap adds a default bottom mask for typical answer layouts. You can resize and reposition any mask.
All mask data is stored locally on your device.
The Today tab shows which mistake review cards are due. After each card, rate yourself Again, Hard, Good, or Easy. The app schedules the next mistake review automatically using a spaced repetition algorithm.
You can also cram by subject, tag, or exam — without disrupting the review schedule.
See FAQBuilt for students, exam candidates, and parents who want a private, focused tool.
Scan, import, rotate, and crop. Batch-import a full test paper in under a minute. On-device OCR extracts question text automatically.
Cover any part of the image with a resizable mask. Reveal answers only when you are ready to check, so every mistake review is a true redo.
SM2-style scheduling keeps due cards in front of you at the right time. Rate Again, Hard, Good, or Easy after each mistake review to adjust future intervals.
Export a Redo Sheet, Answer Key, or Review Packet as a PDF. Choose A4 or Letter, filter by subject or exam, and print in under 30 seconds.
No account, no cloud uploads. Your mistake review cards, images, OCR text, and review history stay on your device. Privacy is the default, not a toggle.
Group mistake review cards by subject, exam date, mistake reason, or custom tags. Filter and search your entire collection instantly.
A quick look at capture, answer masks, review ratings, PDF export, and progress tracking on iPhone.
Anyone who learns best by revisiting and redoing their own mistakes.
SAT, ACT, MCAT, LSAT, AP, IELTS, TOEFL, CPA — build a private wrong-answer journal and print a targeted Redo Sheet the night before your exam.
Most popular
Keep a running mistake review notebook from homework, quizzes, and tests. Review due cards each morning without relying on a teacher or tutor.
Daily habit
Photograph your child's wrong answers from school tests. Organize by subject, schedule weekly mistake review sessions, and print practice sheets without any account or subscription.
Privacy-first
Your exam material, study notes, and wrong answers are sensitive. Mistake Review never uploads your data. On-device OCR keeps every scan private.
No account needed
Start free. Upgrade when you're ready for unlimited mistake review cards.
Free
$0
Everything you need to start a mistake review habit.
Pro
Best value: Lifetime$2.99/month
$19.99/year
$49.99 one-time
For serious exam prep and long-term learners.
Real experiences from students and exam candidates who use Mistake Review daily.
"I scan my practice test pages right after grading, add masks to the answer choices, and review the hardest ones each morning. Mistake Review turned my wrong answers into the most useful study material I have."
Sarah K.
MCAT candidate
"My daughter was throwing away her graded tests. Now we photograph them the same evening, tag by subject, and print a redo sheet every Sunday. Her math scores have improved noticeably."
James T.
High school parent
Common questions from students and parents getting started with mistake review.
No. All mistake review cards, images, OCR text, masks, and review history are stored only on your device. Mistake Review has no official question bank and no shared content. RevenueCat is used only to verify purchases and never receives your study material.
Mistake Review uses an SM2-style algorithm. After each mistake review, you rate the card Again, Hard, Good, or Easy. The app calculates the next due date based on your rating and the card's history. Cards you find hard come back sooner; cards you know well are spaced further apart.
Yes. You can export a Redo Sheet (answers hidden), an Answer Key (answers shown), or a Review Packet (both combined). Choose A4 or Letter paper size and filter by subject, exam, tag, or favorites. PDF export is available on the free plan for basic redo sheets; advanced presets are a Pro feature.
The free plan lets you create up to 40 mistake review cards, run full review sessions, add answer masks, and export a basic redo sheet PDF. Pro unlocks unlimited cards, advanced PDF presets (Answer Key, Review Packet), and local backup and restore.
Yes. You can create text-only mistake review cards for any subject. Type the question, answer, explanation, and notes directly without attaching an image.
Yes. All core mistake review features — creating cards, reviewing, masking, and exporting PDF — work completely offline. An internet connection is only needed to verify Pro purchases.
Capture your first wrong answers in under two minutes.
Free for up to 40 cards — no account, no uploads, no subscriptions required to get started.
Available for iPhone and iPad. Free to start. Pro unlocks unlimited mistake review cards and advanced PDF exports.