KDAN PDF vs StarForce Reader

KDAN PDF is a PDF app for Android, iOS, Mac and Windows, with tools for viewing, annotation, editing and conversion. The free plan includes viewing, notes and annotations, handwriting, signatures and form filling, but not text editing, form creation, OCR or PDF conversion. Document 365 costs USD 59.99 per year and adds text editing, merging and splitting, Office file conversion, OCR for scanned PDFs and password protection. Document 365 AI+ costs USD 99.99 per year and includes those features plus AI services such as auto-redaction, summarization, document review and paragraph translation. Both subscriptions offer a seven-day free trial. A lifetime license costs USD 119.99 per device and covers one desktop device, with offline work that does not require cloud uploads. Paid plans provide read-aloud text-to-speech. Refunds may be requested within 14 days after purchase, subject to store exclusions. KDAN PDF is powered by KDAN Mobile Software Ltd., founded in 2009 and based in Tainan City, Taiwan.

StarForce Reader is a free application for viewing PDF, EPUB, SFPDF and PCDOC files; on mobile devices it can also play protected videos. Its reading tools include tabs, searches for text and titles, and a saved last reading position, along with activation and deactivation controls for protected documents. Downloads are listed for Windows, Linux, RED OS, macOS, Android and iOS. On Windows, the first opening of a protected document activates it and ties it to that computer’s software and hardware setup. Whether printing is possible depends on the publisher’s settings, and moving an activation to another computer may be disabled. On Android, removing the app also removes the protected-document license, so another activation is needed after reinstalling to view that document. The maker describes installation as free of promoted third-party utilities. For support, StarForce provides a feedback form and recommends SF Helper to help diagnose problems with protected applications. Its maker, Protection Technology, LLC, says it has developed software solutions since 2000.