Let Gaaiho PDF Reader handle your mobile PDF needs.

Gaaiho PDF Reader is a free PDF app with unique UI in terms of original layout. It takes mobile PDF reading to a whole new level. With over 20 years of PDF development history, ZEON’s Gaaiho PDF Reader ensures you a high-quality mobile PDF reading experience with a rich array of functions.


PDF Viewing
-Industry-leading document open speed
-View PDF package, comment, attachment and encrypted document
-Free to choose single page view or continuous view.
-Switch Day/Night modes easily to protect your eyes
-Click page number, enter a number and go to the corresponding page
-Fast add and edit bookmark
-Search the content of the document
-Support text reflow, and keep the original font format for excellent display effects

Note and Comments
-Use highlight, cross-out and underline to add comment on document with customizable color and opacity
-Note lets you to add text comment anywhere in PDF
-Use Draw Tools to mark up PDF content with customizable color, thickness and opacity. Move and undo are also supported
-A rich array of draw tools, such as line, arrow, rectangle and oval
-Batch remove comments

Document Management
-Rename document
-Select one or multiple documents to share
-Select and delete multiple documents

Online Document Sharing
-Get documents in and out of Dropbox
-Add WebDAV servers to upload/download documents easily
-Access documents in Gaaiho PDF Reader or upload documents from web (permissions adjustable), breaking the barrier between computer and your mobile