Orion Viewer - Pdf & Djvu - File viewer & navigation

This application serves as a viewer for various formats including PDF, DJVU, XPS, comic book (CBZ, CBR, CBT), and TIFF files. Users can scroll through pages using touch gestures (refer to Menu/Settings/Tap Zones for more information).

Key features of the application include:

* Navigation through an outline

* Support for bookmarks

* Ability to navigate pages via screen taps, Tap Zones, and key bindings

* Option for text selection

* Double tap functionality for selecting single words, with the possibility of translating through an external dictionary

* Customizable zoom levels

* Manual and automatic border cropping options

* Orientation choices for portrait or landscape viewing

* Various navigation patterns within pages (left to right, right to left) supported

* Integration with external dictionaries

* A built-in file manager that displays recently opened files

The Orion Viewer is an open-source project available for free under the GPL license.

If you wish to support this project, contributions can be made by purchasing donation packages of $1, $3, or $5 from the market.

Title: A Versatile and Intuitive Document Reader That Exceeds Expectations

Having used Orion Viewer extensively for both academic and leisure reading, I can confidently say it stands out as one of the most capable and thoughtfully designed document viewers available. The app's remarkable versatility in handling diverse formats—from academic PDFs and DJVU files to comic book archives—has made it my go-to solution for all digital reading needs. 

What truly impressed me was the seamless navigation system; the customizable Tap Zones and gesture controls feel intuitive from the first use, eliminating the frustration often associated with zooming and scrolling through complex documents. The text selection feature, particularly the double-tap word translation integration with external dictionaries, has been invaluable for my research work, transforming how I interact with foreign language texts. 

I frequently utilize the automatic border cropping for scanned documents and the flexible page orientation options, which adapt perfectly whether I'm reading on a phone or tablet. The built-in file manager keeps my recent documents organized, while the open-source nature of the project provides transparency and reliability that proprietary alternatives often lack. Orion Viewer strikes the perfect balance between powerful functionality and minimalist design, delivering a reading experience that genuinely enhances productivity without unnecessary complexity.

Frequently Asked Questions (FAQ):

•   What file formats does Orion Viewer support? The app supports a wide range of formats including PDF, DJVU, XPS, comic book files (CBZ, CBR, CBT), and TIFF images, making it suitable for both document reading and comic book enjoyment.

•   Is the app completely free to use? Yes, Orion Viewer is open-source and free under the GPL license. The donation packages are optional for users who wish to support development but aren't required for full functionality.

•   Can I use the app without an internet connection? Absolutely. Once installed, all viewing features work entirely offline, making it perfect for reading documents anywhere without connectivity requirements.

•   How does the dictionary integration work? When you double-tap to select a word, Orion Viewer can interface with external dictionary apps installed on your device to provide instant translations or definitions.

•   What makes Orion Viewer different from other PDF readers? Its combination of format versatility, customizable navigation controls, open-source transparency, and lightweight design sets it apart from more bloated commercial alternatives.