This is an app that allows you to open text files, comic files, compressed files, PDF, epub files stored on your Android phone or web server and view them as if they were books.

It does not provide content (novel/manga files) by default.
※ Only Google Play Protect-certified devices are supported.

The main features are as follows.

1. text viewer

- Support TXT, CSV, SMI, SUB, SRT
- Support EPUB, MOBI, AZW, AZW3 (text and picture display), built-in font support
- Open compressed text (ZIP, RAR, 7Z, ALZ/EGG) directly
- Change fonts (calligraphy / serif), adjust size/spacing/margins
- Modify character encoding (Auto/EUC-KR/UTF-8,...)
- Change text/background color/background image
- Page turning method: arrow/screen tap/screen drag/volume button
- Flip effect (animation) : roll over, slide, swipe, scroll
- Quick navigation: navigation bar, dial, page input
- Add/rename/sort/lookup bookmarks
- Reading: language selection, speed control, special characters/kanji exclusion
- Slideshow support: adjustable speed
- Search text: one by one, search all
- Edit text: edit, add new file
- Text alignment: left, justified, 2-sheet horizontal view
- Quick brightness
- Sentence organization, file division (long tap on file name)

2. STYLE VIEWER (EPUB VIEWER, EBOOK READER)
- Support epub, mobi, azw, azw3
- Display text/picture/table/style
- Support built-in font
- Show and move to hyperlinks
- Quick Navigation: navigation bar, dial, input page no.
- Add/rename/align/lookup bookmarks
- Search Text: Search All/Files Full

3. comic viewer

- Support JPG, PNG, GIF, BMP, WEBP, TIFF, HEIC, AVIF, ZIP, RAR, 7Z, CBZ, CBR, CB7, ALZ/EGG, PDF files
- Open compressed pictures (ZIP, RAR, 7Z, ALZ/EGG) directly
- Support zip streaming
- Support double compression
- PDF support: zoom up to 8x and sharpen option when zooming in
- Left-right order/shuffle: left -> right, right->left (Japanese style), landscape 2-page view
- Zoom in-out, magnify
- Page turn method: arrow/scroll tab/scroll drag/volume button
- Flip effect (animation): left/right scroll, up/down scroll, webtoon scroll
Webtoon scroll can smoothly scroll very long pictures.
- Quick navigation: navigation bar, dial, page input
- Add/rename/sort/lookup bookmarks
- Slideshow support: set in seconds
- Keep picture zoomed in
- Support moving gif/webp/avif
- Picture rotation support (manual rotation, JPEG/webp auto-rotation)
- Double filter(inversion, sepia, ...)
- Crop edge

4. file function

- Reading history color display: red (recent), green (partially read), blue (fully read)
- Preview: Tiled(Large, Small), Detail
- Select file extension
- Sort: Name, Size, Date
- Support delete (multiple)
- Support rename, copy, move
- Search: name, content, picture
- Uncompress file manually
- Support read/write of USB storage(FAT32,NTFS,exFAT)

5. other

- Theme/Color
- Support language selection (Korean, Chinese, Japanese, English)
- Support Auto Sync. of reading history
- Support SFTP (secure file transport protocol)
- Support FTP (file transport protocol)
- Support SMB (Windows Shared Folder, Samba)
- Support WebDAV
- Support Google Drive
- Support Dropbox
- Support MS OneDrive
- Password lock
- Support S-pen of Note 9 and above: page flip, slideshow pause
- Headset button support: Pause slideshow
- Media button (Bluetooth earphone, etc.) support: Pause reading
- Backup/restore settings (Maru, Ara compatible)
- Shortcut management (e.g. add/delete NAVER NDrive app shortcut)

Permission information
- Storage space (required): Read content or modify files