ErrorBank icon

ErrorBank

Mistake notebook for exam prep

Every mistake, a turning point.

Photograph the questions you got wrong, organise them by subject and topic, and let smart reviews bring each one back until you master it.

Download on the App Store Coming to Google Play
ErrorBank home: a 6-day streak, today’s activity, subjects and questions due for review (sample data)
  • 1–10mastery target per question
  • PDFexport your notebook
  • 0data collected
Platforms
iPhone, iPad, Android (coming soon)
Requires
iOS 26.5
Languages
Turkish and English
Price
Paid app, no in-app purchases
Version
1.2

Features

A closer look

  1. Capture in seconds

    Photograph a question or pick it from Photos, crop it and file it under its subject and topic.

  2. Smart spaced review

    Questions come back on a schedule that adapts to difficulty. A missed attempt returns the next day; correct answers count toward your mastery target.

  3. Solve on the page

    Write on the question image or a whiteboard with your finger or Apple Pencil.

  4. Organised by subject

    Subjects, topics and tags keep hundreds of questions tidy, with solved and open counts at a glance.

  5. Progress you can see

    Solve rate, accuracy, streaks and weekly charts show where you are improving.

  6. Down to every topic

    See which topics hold your open questions and focus your study where it matters.

  7. Gentle reminders

    Optional daily reminders, scheduled on your device, keep your review streak alive.

  8. Export to PDF

    Turn a selection of questions into a PDF to print or share with a teacher.

Screenshots

  • ErrorBank home: a 6-day streak, today’s activity, subjects and questions due for review (sample data)

    Your day at a glanceScreenshot

  • A saved geometry question with its photo, difficulty and smart review progress

    Every mistake, keptScreenshot

  • Search and filter every saved question by subject, difficulty and status

    Find anythingScreenshot

  • Statistics: solve rate, streaks, accuracy and weekly attempts

    Progress you can seeScreenshot

  • Subjects with question counts and solved versus open progress

    Organised by subjectScreenshot

Privacy at a glance

What the app collects, as declared in the store privacy labels, explained in full in the privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Read the full policy

Questions & answers

Does ErrorBank need an internet connection or an account?

No. ErrorBank works fully offline and has no accounts. Your questions, drawings and statistics are stored only on your device.

Which exams is it for?

ErrorBank is built for students preparing for exams such as the Turkish YKS and LGS, and it works for any subject you study.

How does the review schedule work?

Each question has a mastery target of 1 to 10 correct reviews. Review intervals depend on difficulty, and a missed attempt brings the question back the next day.

Are there subscriptions or in-app purchases?

No. ErrorBank is a one-time purchase on the App Store, with no ads and no in-app purchases.

What happens to my data if I delete the app?

Deleting the app removes all of its data from your device. Export important questions to PDF first if you want to keep them.

How do I get help?

Open a support request on this page. You will get a private link to follow the conversation.

Help & legal

Next app Witness Be present. Remember everything.