Orion Viewer is pdf, djvu, xps, tiff and comic books (cbr, cbz, cbt) file viewer
About this app
Orion Viewer is pdf, djvu, xps, cbz and tiff file viewer for Android devices based on mupdf and DjVuLibre libraries.
Application features:
• Outline navigation
• Bookmarks support
• Page navigation by screen taps + Tap Zones + Key binding
• Text selection
• Single word selection by double tap with translation in external dictionary
• Custom zoom
• Custom manual and auto border crop
• Portrait/landscape orientation
• Support different navigation patterns inside page (left to right, right to left)
• External Dictionaries support
• Built-in file manager with recently opened file view
Licensed under GPL-3.0-or-later, by Michael Bogdanov.
What's New in v0.96.1
Imported from the F-Droid repository index.
Version history
Jan 16, 2026 · 10.2 MB · Android API 16–35 · code 2454
Imported from the F-Droid repository index.
SHA-256 5ed0a9af6d59699537ba15c33978c237321ed520ae77f318a88a3170bc177799
Jan 16, 2026 · 10.6 MB · Android API 16–35 · code 2453
Imported from the F-Droid repository index.
SHA-256 8028721840b11c6289a848499b6222d381f7e07cd35afcdd08b104d3da9b2728
Jan 16, 2026 · 10.6 MB · Android API 16–35 · code 2452
Imported from the F-Droid repository index.
SHA-256 f7399c752e83160dfe8999156e01fec614811948b0a0e66c66714fc91a2f0340
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be universe.constellation.orion.viewer is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 0.96.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Orion Viewer - Pdf & Djvu first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Orion Viewer - Pdf & Djvu, and a listing is removed when the evidence for it stops holding up.
Get Orion Viewer - Pdf & Djvu
Every source we list for universe.constellation.orion.viewer is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
5ed0a9af6d59699537ba15c33978c237321ed520ae77f318a88a3170bc177799
Signing certificate
754b558ac1e70918dac52e11126aa80547161faf47d1a179961cd026b18c0890
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.