오답노트AI - 수학 문제풀이·오답정리·AI튜터

2Labs

In-app purchases

About this app

Just take a picture. The AI ​​creates your error notebook.

If you spend time cutting, pasting, and copying incorrect answers, you won't have time to solve them again.

The Error Notebook AI takes over that process with just a single photo.

Here's how it works:

• Take a picture of the incorrect question and just match the area — the AI ​​reads the text and options and transcribes them.

• It asks you once if you read values ​​that require visual inspection, such as graphs and shapes, correctly.

• Questions are automatically organized by subject and unit, and appear when it is time to review them.

It doesn't show the answer right away.

• It opens one by one in the order of Hint → Solution Direction → Step-by-step Explanation → Answer.

• You can look at only what you need and try solving it again.

• If you choose your explanation style and tone, the explanation will follow that style.

If you get stuck, ask the AI ​​tutor right away.

• Take a picture of a problem you get stuck on while studying and ask immediately — this is possible without registering the incorrect answer.

• Conversations are saved. You can continue asking questions today that you were asking yesterday

• You can retrieve your registered questions to continue asking them

Reviews come back automatically

• Questions you have checked the answer to return as "Questions to Solve Again" the next day

• If you get it right, you can review it again after 3 days; if you get it right twice in a row, the learning is complete

• We notify you in the evening on the day there are questions to solve again (you can change the time or turn it off)

Instead of solving the same problems again

• We generate similar problems with the numbers and conditions changed

• The app solves them directly and outputs only the questions you got right

A test paper containing only your incorrect answers

• You can select only the questions you got wrong, bind them into a single sheet, and solve them like a test

• If you change them into similar questions and submit them, it provides grading and a report card

• You can print it as a PDF and solve them by hand (the answer key is at the very back)

Your week's effort accumulates

• On Sunday mornings, we organize your records of registered and reviewed material from the week into a weekly report

• See the number of incorrect answers by unit, how many days you have been studying, and your weak points at a glance

Incorrect Answer Note AI Pro (Optional) Subscription)

You can use unlimited incorrect answer reviews, unlimited similar questions, unlimited AI questions, and question paper PDF extraction.

• This is a monthly (₩9,900) or annual (₩79,000) auto-renewing subscription that will automatically renew unless canceled before the end of the period.

• Payments are billed to your Google Play account, and you can manage or cancel your subscription at any time via Google Play › Billing & recurring payments.

• Terms of Service: https://odapnote.ai.kr/terms

• Privacy Policy: https://odapnote.ai.kr/privacy

• Refund Policy: https://odapnote.ai.kr/refund

What’s new

• 촬영 화면을 닫은 뒤에도 '카메라 사용 중' 표시가 남아 있던 문제를 고쳤어요. 이제 촬영할 때만 카메라가 켜져요.
• 새 버전이 나오면 앱에서 알려드려요.