Challenger Viewer Donation

The Challenger

About this app

Challenger Viewer Donation is an advanced comics, manga, books and PDF viewer.
There is a FREE version available on Google Play Store.
The Donation version is exactly the same (no extra features) and donation will help me to improve the app.

It's really simple to use. You just have to scroll ! Pages are automatically loaded and displayed (no need to click to go to next page).
This version works perfectly on phones AND tablets.

Supported image file formats are JPG, PNG, GIF, WebP (Android 4.0+) and BMP.
Supported book file formats are PDF, CBZ/ZIP, CBR/RAR, CBT/TAR, CB7/7Z, DjVu, and ePUB.

Main features are :
• Automatic page loading
• Zoom using multi-touch
• Vertical/Horizontal scrolling
• 2 display modes (Simple View which displays pages one by one and Multiple Image View which displays all pages one after the other)
• Scale filters: Bilinear, Bicubic, Lanczos4
• Library with covers displayed to quickly open comics (multiple kind of views available)
• Automatically switch to next issue when last page of the comic is displayed
• Border cropping
• Read from left to right or right to left
• Actions can be customized
• Single page and "2 page" display mode
• Filter to improve displayed image quality
• Manual scrolling by moving finger on screen
• Autoscrolling by long pressing on screen
• Tap to go to Next/Previous pages
• Fit to Width/Height/Screen display
• Multiple Image preview type
• Option to direct access to page
• History management
• Support multi-language (for now, english and french)
• Border can be display over Bitmap to easily identify each pages
• Contrast/Brightness/Saturation management
• Screen brightness management
• Application can be moved to SD Card
• Cached data can be stored in internal memory or SD Card
• Supports Samsung "Multi-Window" mode
• Color themes

Files can be accessed on the device or network.
Supported network protocols are :
• Google Drive
• OneDrive/SkyDrive
• Mega
• Ubooquity (http://vaemendis.net/ubooquity)
• DLNA/Upnp (Need Android >= 4.0.3)
• OPDS (beta)
• Windows/SAMBA/CIFS
• DropBox
• Webdav/Cloud (like box.com, 4shared.com, alwaysdata.com, ...)
• FTP
• SFTP

The application needs a phone/tablet with lots of memory and a powerful processor, so don't be disappointed if your phone is quite old and performance is not good.
For instance, it works perfectly on Nexus 4, Nexus 7, Nexus 10, Galaxy S2, Galaxy S3, Galaxy S4, Galaxy S5, Galaxy S6, Galaxy S7, Galaxy Tab, ...

Documentation is available at : http://challengerviewer.wordpress.com/challenger-comics-viewer-documentation/
An FAQ is available at : http://challengerviewer.wordpress.com/challenger-comics-viewer-faq/
The English forum : http://forum.xda-developers.com/showthread.php?t=1389440

Please add comments if you like this app or if you have some new features idea.
To report bugs, don't hesitate to send me e-mail.
Thanks !

Ratings and reviews

Donated because it's worth every cent and more. Been using this for years and it's always kept the consistency. Takes time to tweak exactly to your preferences but once you've done so, it's bang on. So dev; I do have a bit of trouble accessing Google drive though. 'Unable to access drive: null'. If you get the chance, advice on getting around that would be much appreciated. Love what you've done here.

Best comic reader ever. I use it for cbr and cbz (rar and zip) and works like a charm. Customizable view, gestures and hard key functions. It's laudable how is free and add free even if you don't pay. I made a donation, Android may told me it wasn't optimized for the last Android version, but still works smoothly (I think they solved that in the last update anyway). Only thing missing is a way to remove pages from the books, and the files themselves.

Excellent if it works for you. Sadly after upgrading to OP7tPro on Android 10, it no longer works for me. This was always my favourite reader, thanks to the vertical continuous scroll reading option. Actually it now appears to be abandoned, having last been updated in 2017.

What's new

• Compatible with Android 14