Javelin PDF Reader vs Okular

Javelin PDF Reader is a free app for viewing standard PDFs and files secured with Drumlin DRM. Readers are available for Windows 8/10/11, macOS 10.13 or later, Android 7 or later, and iOS or iPadOS 9 or later. Reading tools include hyperlinks, navigation trees, different page layouts, text search, annotation, and markup; offline reading also supports zoom and Read-Aloud text-to-speech. DRM-protected files can prevent copying and onward distribution, and publishers can set hard expiry dates or expiry periods that begin at first viewing. Printing is limited to desktop and laptop devices and depends on publisher permission, with controls for copies and page counts. Dynamic watermarks can show device or user details, a filename, authorization code, and date and time. Screen-capture protection varies by platform: it is optional on Windows and macOS, always set on Android, and offers a subset of facilities on iOS. Authorization records may include device details and IP address and are retained for three years. Corporate networks may require proxy configuration or web authorization.

Okular has no write-up on Specifiction yet; its figures are above.