디북 - 올인원 문제집 앱

We will be your reliable study companion
D-book service opened. (✿˵•́ᴗ•̀˵)

The world's lightest problem book
Carry only one ‘D-Book’!

1) Easy download of workbook
• You can download and study the workbook you want on your smart device.

2) Provision of writing service
• Use a variety of pens to take notes right away in the workbook.

3) Problem & commentary screen division function
• Commentary that makes you curious as you solve the problem! Study while watching problems and explanations together with the split screen function.

4) More than 400 elementary/middle/high school workbooks installed
• Meet the popular textbooks of genius education right away.
• Contains Elementary Honor Student Solution Series, Math Leader Series, Middle School Check Check Series, and High School Shelfa Series.
More textbooks will be added in the future.

All-in-one problem book D-book with everything in one app,
Study lightly with one D-book today :)

thank you

※ Information on access rights
[Optional access rights]
-Storage space: Used to open a file to be put in my bookshelf
- Notifications: Used to receive new message notifications
※ The D-Book app can be installed in an Android OS 8.0 or higher environment. In the case of Android versions below 6.0, normal execution of the app is not possible, so it is recommended to check if the operating system of the terminal can be upgraded and upgrade.
[How to revoke access permission consent]
-Settings> Applications> DiBooks> Application Settings> Select Permissions> Select Allow or Deny
-Settings > Applications > ‘︙’ > Permission manager > Select the corresponding access right > Select the corresponding app > Select Allow or Deny