Readdle releases PDF Expert 4, a new version of the leading iPad application for reading, annotating and signing PDF documents, as well as filling in PDF forms. PDF Expert 4 comes with stunning PDF rendering and hi-resolution graphics that look great on the Retina display. At the same time, PDF Expert 4 is the first application for the iPad that reads interactive PDF documents with embedded audio and video content.

Students, researchers, academics or anyone who needs to review multiple PDF documents on a regular basis will benefit greatly from using PDF Expert 4 on their new iPads. Text, images, annotations and notes - everything looks sharp and perfectly detailed. The Retina screen makes it possible to read and annotate dozens of documents with ease.

Many PDF documents such as presentations and textbooks have video or audio files inside. Now laptops can be effectively replaced with iPads when making interactive presentations to customers and colleagues or simply while studying at home.

Business users are the main customers of PDF Expert, with the help of which thousands of documents are being read every day. Now this number will be even higher, thanks to the support of PDF Portfolios and PDF documents with attachments. These types of PDFs are frequently used in a corporate document workflow and PDF Expert 4 makes it possible to view and annotate them right on the iPad.

PDF Expert is famous for its great user interface and experience. The new version makes it even better and much more friendly for the new users. Now PDF Expert displays thumbnails, which are large document previews instead of the icons in the file list. This allows people to navigate quickly inside their PDF library and rearrange documents using simple drag and drop.

"PDF Expert 4 is a very important step forward for the iPad. It is a perfect document reader in any business, government or educational environment. Now almost every type of PDF documents can be read, annotated or signed on the iPad. With PDF Expert 4 Readdle brings the concept of a mobile paperless office to reality," says Igor Zhadanov, Readdle CEO.