"Got a question? 
Want to talk to me about it?"

Anser

Kedu

"Need help with
complex logical reasoning?"

Questi

Save the image with the rotation applied?

Save changes?

Enter your coupon code to receive benefits.

Enter Coupon

Check the credits that will be used for this run.
Additional features are automatically discounted by your add-on plan.

Check the credits that will be used for this run.
Credits are consumed based on the options you selected.

Run {featureName}?

Confirm the credits to recharge and payment amount.

Recharge credits?

Interactive learning material

Fullscreen interactive learning material

Delete chat

Delete all chats

Edit chat name

Share your chat

Edit library name

Share your library

Login Required

Pick Problem Image

Name

Clear canvas

Copy to clipboard

Insert into editor

Handwriting Input

LaTeX Guide

Handwritten solution

Report an Issue

This tab was stopped because another account signed in. Continue with the new account to restart safely from Home.

The account changed in another tab

Would you like to sign out there and continue signing in on this device?

You're already signed in on another device

Untitled page

Payment successful!

Do you want to change to this plan?

Plan

Additional Features at a Glance

Subscription Guide

Monthly Base Credits

School Exam DB

{conversationType, select, drill_exam {Tell me the units and difficulty you want. I will help from finding problems to finishing the exam.} textbook {Tell me the units and question counts you want. I will help organize the problems and finish the workbook.} other {Tell me what you want to create. I will help from start to finish.}}

{conversationType, select, drill_exam {Shall we build a drill exam together?} textbook {Shall we build your own workbook together?} other {Shall we create something together?}}

Select a previous conversation to continue it.

Conversation history

Search status

Problem Bank AI

Book chat

Read problems like a workbook page and ask the AI — "pick 5 easy problems" — to choose for you.

Book chat view is new

Book chat counts toward your Questi usage, so it is not available on the Free plan.
Credits alone do not unlock it.

Available on Basic and above

Active tasks

Top up your usage or upgrade your plan to keep using book chat.

Your Questi usage is used up

Try changing folder/tab/search conditions
or create a new DB.

No items match your conditions

No public problems match your current conditions.

No public DB problems to show.

Select one to add it to the active condition group.

Frequently used conditions

All conditions within a group must match; matching any one group is enough.

Problem search conditions

Choose where to search first. The conditions below apply within the selected database.

Search scope

Problems or folders you share will appear here.

No shared-by-me problems.

Problems or folders shared by others will appear here.

No shared-with-me problems.

Title

Select Yes to apply your changes, or No to close without applying them.

Apply the changes to your problem search conditions?

Locked problem

Exams used in (most recent)

Untitled exam

Choose candidates to create your own exam.

You have {count} exam candidates!

{itemCount} candidates · {selectedCount} selected

Create exam

You can register problems from the My DB card menu.

No community problems yet.

You can register your exams from the exam history page.

No community books yet.

Other users can save this problem to their DB for free.

Other users can save this exam and its problems for free.

Other users can save this problem to their DB after paying the credits you set.

Other users can save this exam and its problems after paying the credits you set.

Free items can be copied immediately. Paid items charge the buyer and credit the seller when purchased.

Choose whether other users can copy this problem for free or by paying credits.

Choose whether other users can copy this exam and its problems for free or by paying credits.

Register exam to Community DB

Register to Community DB

Subject

Copy problems shared by other users into your DB for free or with credits.

Community DB

Standard analysis costs {standardCredit} credits per problem. Endnote-processed HWP/HWPX files cost only {endnoteCredit} credits per problem.

Credit usage

Upload the problem files you want to add to your DB.

File upload

During the event, each upload analysis type is charged at the displayed event price instead of the regular price.

Problem DB upload discount

Analysis and tagging of extracted problem-solution pairs

HWP · HWPX

The {taggingCredit}-credit tagging rate cannot be applied because this file has no endnote-paired problem and solution. Convert it to PDF and continue at the image/PDF analysis rate of {analysisCredit} credits per problem?

No endnote-paired problems and solutions found

Segmentation, analysis, tagging, and solution generation

Image · PDF

Review and select segmented image/PDF problems or problem-solution pairs extracted from an endnote-processed HWP/HWPX file.

Convert the selected pages into images and add them to the upload list.

Select PDF pages

Automatically saves successfully analyzed problems as a new exam. You can continue editing it from your exam/textbook history.

Review Segmented Problems

Only the problem will be added to the Problem DB.

Tag HWP/HWPX Problems

Review the content and select the pairs to tag.

Select HWP/HWPX Problem-Solution Pairs

When this finishes, you can choose the problems to add on this page.

{completedCount} uploaded · {failedCount} failed

DB History

{completedCount} registered · {failedCount} failed · {similarCount} Questi generated

Select Segmented Problems

This appears in public DB search and filters. Leave unknown values blank.

Source information (optional)

Add New Problems

Title (Optional)

e.g.) June 2025 Evaluation Mock Exam

Create folder

Select subject

This will delete the selected problem from My DB. You can’t undo this action.

You can’t undo this action. Continue?

Delete this problem?

Delete problems in this folder from DB and queue search index cleanup.

Delete "{folderName}". Choose how to handle {count} included problem(s).

Keep problems and move them out of the folder.

Delete folder

Problem {number}

File title

View Original Problem

Problem title

Enter problem title.

View Related Problems ({count})

The solution is being prepared. You can view it on this problem when it is ready.

Problem detail

Use filters in My Problem DB or Public Problem DB to select the options you want.

No problems selected.

Problems without solutions cannot be used in an exam or textbook. Solutions will be generated after payment, and you will move on automatically when they are ready.

We are checking progress automatically. You will move to the next step when every solution is ready.

Generating solutions for {count} problems

Choose a document type and title to create an editable draft.

Create exam/textbook

You can select up to {count} problems with the current settings.

Enter problem count

Use problems from your DB to create your own exam or textbook.

Upload original problems, generate similar questions, and manage your own problem sets.

Add problems from the explorer.

Use answer sheets to collect grading statistics.

Start the exam with the candidate problems you selected.

Select manually

Question Sources

Mixed question ratio

Choose all curricula or the units to include.

Coverage

Automatically add analyzed DB problems by count.

Generation settings

Random generation

Exam title

Automatically create an exam using filters and a problem count.

Detailed settings

Organize DB problems into your own textbook.

e.g. 2025 June mock exam

Enter a title.

Review the problem order and scores one last time.

Save this exam?

Adjust each problem's score and inspect similar problems.

Finish the problem settings

Untitled

Apply your edited HWPX, cover, and contents to finish the PDF

Review the original or edited HWPX and manuscript PDF

Write each concept page or generate a draft

Review, reorder, and save the finished pages

Adjust scores and inspect similar problems

Set the textbook outline and problem order

Choose one design for the whole textbook from the cover previews

Choose whether to create a similar textbook from this structure

Continue editing the manuscript and PDF for the textbook you just organized.

Continue with this textbook

Choose whether to finish only the current textbook or add one similar textbook made with comparable problems.

Which textbook would you like to create?

Continue with the current textbook or create one separate draft using similar database problems.

This textbook is created as a single copy. Compare the candidates for each problem and choose the ones you prefer.

Review similar problem candidates

Create one similar textbook?

Keep the current textbook and create one copy using similar database problems.

Add one similar textbook

Select a format to download the question sheet/solution sheet (or original file).

Exam file preparation

Cover title (e.g. 数　　学)

Choose the file format and content to download.

	Free	Basic	Plus	Super	Premium
Questi per minute	-	84	84	84	84
Kedu per minute	-	60	60	60	60
Anser per minute	-	10	10	10	10
My Library per page	-	6	6	6	6
My Lectures per minute	6	6	6	6	6
Document Convert per page	209	176	165	154	143
Automatic document template generation (image → template) per page	500	500	500	500	500
Video generation per question	2000	2000	2000	2000	2000
Similar Math Questions per question	1100	1050	1000	950	900
Advanced Math Similar Questions per question	1625	1575	1525	1475	1425
AI Mathematics per question	500	500	500	500	500
Similar English Questions per question	450	400	350	300	250
Advanced English Similar Questions per question	850	800	750	700	650
Similar Korean Questions per question	450	400	350	300	250
Advanced Korean Similar Questions per question	850	800	750	700	650
Korean Syntactic Analysis per use	154	121	110	99	88
English Syntactic Analysis per use	154	121	110	99	88
Exam Analysis per use	2200	1650	1540	1430	1320
Exam Similarity Analysis per use	2000	2000	2000	2000	2000
Cram File Upload per use	550	550	550	550	550
Cram Question Generation per question	33	33	33	33	33
STEAM Problem per question	330	330	330	330	330
English Vocabulary Book per word	330	330	330	330	330
Essay Feedback per use	5500	5500	5500	5500	5500
Written-response question generation per use	3000	3000	3000	3000	3000
Written-response grading Per student per attempt	1500	1500	1500	1500	1500
Create Cartoon - Standard per episode	275	275	275	275	275
Create Cartoon - High Quality per episode	1100	1100	1100	1100	1100
Edit Cartoon - Standard per episode	275	275	275	275	275
Edit Cartoon - High Quality per episode	1100	1100	1100	1100	1100
Image Explanation per use	143	132	121	110	99
Handwriting Explanation - Basic per question	120	110	100	90	80
Handwritten explanation - Standard per question	490	440	420	400	380
Handwritten explanation - Advanced per question	1400	1300	1200	1100	1000
Handwritten explanation - Annotated per question	1200	1100	1050	1000	950
Doodle/Handwriting Removal per image	1000	1000	1000	1000	1000
Question Review per question	193	176	165	154	143

Plan

BasicKRW/month9,900₩

Basic

PlusKRW/month19,900₩

Plus

SuperKRW/month39,900₩

Super

PremiumKRW/month69,900₩

Premium

Additional Features at a Glance

Q&A

Q1. What are Questi, Flash, and Answer?

Q2. What is the usage time allocated by subscription plan?

Q3. What is the “My Library” feature in BookChat?

Q4. Is there a difference between using BookChat on the web and the downloaded version?

Q5. How can I use additional features (document conversion, problem generation, etc.)?

Subscription Guide